CA2453768C - Drilling with concentric strings of casing - Google Patents
Drilling with concentric strings of casing Download PDFInfo
- Publication number
- CA2453768C CA2453768C CA002453768A CA2453768A CA2453768C CA 2453768 C CA2453768 C CA 2453768C CA 002453768 A CA002453768 A CA 002453768A CA 2453768 A CA2453768 A CA 2453768A CA 2453768 C CA2453768 C CA 2453768C
- Authority
- CA
- Canada
- Prior art keywords
- casing
- string
- strings
- wellbore
- drilling system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
Abstract
The present invention provides a method and apparatus for setting concentric casing strings within a wellbore in one run-in of a casing working string. In one aspect of the invention, the apparatus comprises a drilling system comprising concentric casing strings, with each casing string having a drill bit piece disposed at the lower end thereof. The drill bit pieces of adjacent casing strings are releasably connected to one another. In another aspect of the invention, a method is provided for setting concentric casing strings within a wellbore with the drilling system. In another aspect of the invention, the releasably connected drill bit pieces comprise a drill bit assembly.
Description
DRILLING 111TH C~NGENTRIC STRINGS ~F Ce4SiNG
BACKGR~UND ~F THE INlfENTI~N
Fiefs! of the invention The present invention relates to methods and apparatus for forming a wellbore in a well. More specifically, the invention relates to methods and apparatus for forming a wellbore by drilling with casing. More specifically still, the invention relates to drilling a well with drill bit pieces connected t~c concentric casing strings.
Description of the Relates! art In well completion operations, a wellbore is formed to access hydrocarbon bearing formations by the use of drilling. ~riliing is accomplished by utilizing a drill bit that is mounted on the end of a drill support member, commonly known as a drill string. To drill within the wellbore to a predetermined depth, the drill string is often rotated by a top drive or rotary table on a surface platform or rig, or by a downhole motor mounted towards the lower end of the drill string. After drilling to a predetermined depth, the drill string and drill bit are removed and a section of casing is lowered into the wellbore. An annular area is thus formed befinreen the string of casing and the formation. The casing string is temporarily hung from the surface of the well. A cementing operation is then conducted in order to fill the annular area with cement. Using apparatus known in the art, the casing string is cemented into the weilbore by circulating cement into the annular area defined between the outer wall of the casing and the borehole. The combina~lion of cement and casing strengthens the wellbore and facilitates the isolation of certain areas of the formation behind the casing for the production of hydrocarbons.
In some drilling operations, such as deepwater well completion operations, a conductor pipe is initially placed info the v~lellbore as a first string of casing. A
conductor pipe is the largest diameter pipe that will be placed into the wellbore. The top layer of deepwater wells primarily consists of mud; i;herefore, the conductor pipe often may merely be pushed downward into the wellbore rather than drilled into the wellbore. To prevent the mud from filling the interior of the conductor pipe, it is necessary to jet the pipe into the ground by forcing pressurized fluid through the inner diameter of the conductor pipe concurrent with pushing the conductor pipe into the wellbore. The fluid and the mud are thus forced to flow upward outside the conductor pipe, so that the conductor pipe remains essentially hollow to receive casing strings of decreasing diameter, as described below.
It is common to employ more than one string ~~f casing in a wellbore. In this respect, the wail is drilled to a first designated depth with a drill bit on a drill string.
The drill string is removed. ~ first string of casing or conductor pipe is then run into the wellbore and set in the drilled out portion of the wellbore, and cement is circulated into the annulus behind the casing string. l~ext, the well is drilled to a second designated depth, and a second string of casing, or liner, is run into the drilled out portion of the wellbore. The second string is set at a depth such that the upper portion of the second string of casing overlaps the lower portion of the first string of casing. The second liner string is then fixed, or "hung" off of the existing casing by the use of slips which utilize slip members and cones to wedgingly fix the new string of liner in the wellbore. The second casing string is then cemented. This process is typically repeated with additional casing sts-ings until the well has been drilled to total depth. In this manner, wells are typically formed with two or more strings of casing of an ever-decreasing diameter.
As more casing strings are set in the wellbore, the casing strings become progressively smaller in diameter in order to fit within the previous casing string. In a drilling operation, the drill bit for drilling to the next predetermined depth must thus become progressively smaller as the diameter of each casing string decreases in order to fit within the previous casing string. Therefore, multiple drill bits of different sizes are ordinarily necessary for drilling in well completion operations.
lNell completion operations are typically accomplished using one of two methods. The first method involves first running the drill string with the drill bit attached thereto into the wellbore t~ concentrically drill a hole in which to set the casing string. The drill string must then be removed, f~ext, the casing string is run into the wellbore on a working string and set within tl~e hole within the welibore.
These two steps are repeated as desired with progressively smaller drill bits and casing strings until the desired depth is reached. For this method, two run-ins into the weilbore are required per casing string that is set into the wellbore.
BACKGR~UND ~F THE INlfENTI~N
Fiefs! of the invention The present invention relates to methods and apparatus for forming a wellbore in a well. More specifically, the invention relates to methods and apparatus for forming a wellbore by drilling with casing. More specifically still, the invention relates to drilling a well with drill bit pieces connected t~c concentric casing strings.
Description of the Relates! art In well completion operations, a wellbore is formed to access hydrocarbon bearing formations by the use of drilling. ~riliing is accomplished by utilizing a drill bit that is mounted on the end of a drill support member, commonly known as a drill string. To drill within the wellbore to a predetermined depth, the drill string is often rotated by a top drive or rotary table on a surface platform or rig, or by a downhole motor mounted towards the lower end of the drill string. After drilling to a predetermined depth, the drill string and drill bit are removed and a section of casing is lowered into the wellbore. An annular area is thus formed befinreen the string of casing and the formation. The casing string is temporarily hung from the surface of the well. A cementing operation is then conducted in order to fill the annular area with cement. Using apparatus known in the art, the casing string is cemented into the weilbore by circulating cement into the annular area defined between the outer wall of the casing and the borehole. The combina~lion of cement and casing strengthens the wellbore and facilitates the isolation of certain areas of the formation behind the casing for the production of hydrocarbons.
In some drilling operations, such as deepwater well completion operations, a conductor pipe is initially placed info the v~lellbore as a first string of casing. A
conductor pipe is the largest diameter pipe that will be placed into the wellbore. The top layer of deepwater wells primarily consists of mud; i;herefore, the conductor pipe often may merely be pushed downward into the wellbore rather than drilled into the wellbore. To prevent the mud from filling the interior of the conductor pipe, it is necessary to jet the pipe into the ground by forcing pressurized fluid through the inner diameter of the conductor pipe concurrent with pushing the conductor pipe into the wellbore. The fluid and the mud are thus forced to flow upward outside the conductor pipe, so that the conductor pipe remains essentially hollow to receive casing strings of decreasing diameter, as described below.
It is common to employ more than one string ~~f casing in a wellbore. In this respect, the wail is drilled to a first designated depth with a drill bit on a drill string.
The drill string is removed. ~ first string of casing or conductor pipe is then run into the wellbore and set in the drilled out portion of the wellbore, and cement is circulated into the annulus behind the casing string. l~ext, the well is drilled to a second designated depth, and a second string of casing, or liner, is run into the drilled out portion of the wellbore. The second string is set at a depth such that the upper portion of the second string of casing overlaps the lower portion of the first string of casing. The second liner string is then fixed, or "hung" off of the existing casing by the use of slips which utilize slip members and cones to wedgingly fix the new string of liner in the wellbore. The second casing string is then cemented. This process is typically repeated with additional casing sts-ings until the well has been drilled to total depth. In this manner, wells are typically formed with two or more strings of casing of an ever-decreasing diameter.
As more casing strings are set in the wellbore, the casing strings become progressively smaller in diameter in order to fit within the previous casing string. In a drilling operation, the drill bit for drilling to the next predetermined depth must thus become progressively smaller as the diameter of each casing string decreases in order to fit within the previous casing string. Therefore, multiple drill bits of different sizes are ordinarily necessary for drilling in well completion operations.
lNell completion operations are typically accomplished using one of two methods. The first method involves first running the drill string with the drill bit attached thereto into the wellbore t~ concentrically drill a hole in which to set the casing string. The drill string must then be removed, f~ext, the casing string is run into the wellbore on a working string and set within tl~e hole within the welibore.
These two steps are repeated as desired with progressively smaller drill bits and casing strings until the desired depth is reached. For this method, two run-ins into the weilbore are required per casing string that is set into the wellbore.
2 The second method of performing well completion operations involves drilling with casing, as opposed to the first method of drilling and then setting the casing. In this method, the casing string is run into the wellbore along with a drill bit for drilling the subsequent, smaller diameter hole located in the interior of the casing string. In a deepwater drilling operation, the conductor pipe includes a drill bit upon run-in of the first casing string which only operates after placement of the conductor pipe by the above described means. The drill bit is operated by concentric rotation of the drill string from the surface of the wellbore. After the conductor pipe is set into the wellbore, the first drill bit is then actuated to drill a subsequent, smaller diameter hole. The first drill bit is then retrieved from the welfbore. The second working string comprises a smaller casing string with a second drill bit in the interior of the casing string. The second drill bit is smaller than the first drill bit so that it fits within the second, smaller casing string. The second casing string is set in the hole that was drilled by the first drill bit on the previous rur~-in of the first casing string. 'the second, smaller drill bit then drills a smaller hole for the placement of the third casing upon the next run-in of the casing string. Again the drill bit is retrieved, and subsequent assemblies comprising casing strings with drill bits in the interior of the casing strings are operated until the well is completed to a desired depth. This method requires at least one run-in into the wellbore per casing string that is set into the wellbore.
Both prior art methods of well completion require. several run-ins of the casing working string and/or drill string to place subsequent casing strings into the wellbore.
Each run-in of the strings to set subsequent casing within the wellbore is more expensive, as labor costs and equipment costs increase upon each run-in.
Accordingly, it is desirable to minimize the number of run-ins of casing working strings andlor drill strings required to set the necessary casing strings within the wellbore to the desired depth.
Furthermore, each run-in of the drill string ar'dlor casing string requires attachment of a different size drill bit to the drill string and/or casing string. Again, this increases labor and equipment costs, as numerous drill bits must be purchased 3t~ and transported and labor must be utilized to attach the drill bits of decreasing size.
Therefore, a need exists for a drilling system that can set multiple casing strings within the wellbore upon one run-in of the casing working string.
~rilling with
Both prior art methods of well completion require. several run-ins of the casing working string and/or drill string to place subsequent casing strings into the wellbore.
Each run-in of the strings to set subsequent casing within the wellbore is more expensive, as labor costs and equipment costs increase upon each run-in.
Accordingly, it is desirable to minimize the number of run-ins of casing working strings andlor drill strings required to set the necessary casing strings within the wellbore to the desired depth.
Furthermore, each run-in of the drill string ar'dlor casing string requires attachment of a different size drill bit to the drill string and/or casing string. Again, this increases labor and equipment costs, as numerous drill bits must be purchased 3t~ and transported and labor must be utilized to attach the drill bits of decreasing size.
Therefore, a need exists for a drilling system that can set multiple casing strings within the wellbore upon one run-in of the casing working string.
~rilling with
3 multiple casing strings temporarily attached concentrically to each other increases the amount of casing that can be set in one run-in of the casing string.
I!/Voreover, a need exists for a drill bit assembly which permits drilling with one drill bit for subsequent strings of casing of decreasing diameter. Cane embodiment of the drilling system of the present invention employs a drilling assembly with one drill bit comprising drill bit pieces releasably connected. Thus, one drill bit is used to drill holes of decreasing diameter within the wellbore for setting casing strings of decreasing diameter. In consequence, operating costs incurred in a well completion operation are correspondingly decreased.
SUMIUIARY ~F °THE IN11~NT~~N
The present invention discloses a drilling system comprising concentric strings of casing having drill bit pieces connected to the casing, and a method for using the drilling system. In one embodiment, the concentric strings of casing are temporarily connected to one another. In another embodiment, the drill bit pieces are temporarily connected to one another form a drill bit assembly.
In one aspect of the present invention, the drilling system comprises concentric strings of casing with decreasing diameters located within each other. A
conductor pipe or outermost string of casing comprises the outer casing string of the system. Casing strings of ever-decreasing diameter are located in the hollow interior of the conductor pipe. The drilling system further comprises drill bit pisses connected to the bottom of each casing string. The drift bit pieces are releasably connected to one another so that they form a drill bit assembly and connect the casing strings to one another.
Located on the outermost casing string on the uppermost portion of the casing string of the drilling system are hangers connected atop the outermost casing string or conductor pipe which jut radially outward to anchor the drilling assembly to the top of the wellbore. These hangers prevent vertical movement of the outermost casing string and secure the drilling system upon run-in of the casing string. The drilling assembly is made up of drill bit pieces with cutting structures, where the drill bit pieces are releasably connected to each other. The oufiermost, first drill bit piece is connected to the conductor pipe and juts radiaily outward and downward into the
I!/Voreover, a need exists for a drill bit assembly which permits drilling with one drill bit for subsequent strings of casing of decreasing diameter. Cane embodiment of the drilling system of the present invention employs a drilling assembly with one drill bit comprising drill bit pieces releasably connected. Thus, one drill bit is used to drill holes of decreasing diameter within the wellbore for setting casing strings of decreasing diameter. In consequence, operating costs incurred in a well completion operation are correspondingly decreased.
SUMIUIARY ~F °THE IN11~NT~~N
The present invention discloses a drilling system comprising concentric strings of casing having drill bit pieces connected to the casing, and a method for using the drilling system. In one embodiment, the concentric strings of casing are temporarily connected to one another. In another embodiment, the drill bit pieces are temporarily connected to one another form a drill bit assembly.
In one aspect of the present invention, the drilling system comprises concentric strings of casing with decreasing diameters located within each other. A
conductor pipe or outermost string of casing comprises the outer casing string of the system. Casing strings of ever-decreasing diameter are located in the hollow interior of the conductor pipe. The drilling system further comprises drill bit pisses connected to the bottom of each casing string. The drift bit pieces are releasably connected to one another so that they form a drill bit assembly and connect the casing strings to one another.
Located on the outermost casing string on the uppermost portion of the casing string of the drilling system are hangers connected atop the outermost casing string or conductor pipe which jut radially outward to anchor the drilling assembly to the top of the wellbore. These hangers prevent vertical movement of the outermost casing string and secure the drilling system upon run-in of the casing string. The drilling assembly is made up of drill bit pieces with cutting structures, where the drill bit pieces are releasably connected to each other. The oufiermost, first drill bit piece is connected to the conductor pipe and juts radiaily outward and downward into the
4 wellbore from the conductor pipe. A smaller, first casing string then contains a similar second drill bit piece which is smaller than the first drill bit piece. As many drill bits pieces and casing strings as are necessay to complete the well may be placed on the run-in string. T he innermost casing string contains a drill bit piece that juts outward and downward from the casing string and also essentially fills the inner diameter of the innermost casing string. The drill bit piece disposed at the lower end of the innermost casing string contains perforations within it which allow some fluid flow downward through the innermost casing string. The drill bit pieces are releasabiy connected to each other by progressively stronger force as the casing string diameters become smaller. !n other words, the outer connections between drill bit pieces are weaker than the inner connections between drill bit pieces. A
working casing string is temporarily connected to the inner diameter of the innermost casing string of the drilling system by a threadable connection or tong assembly.
Fluid andlor mud may be pumped into the working casing string during the drilling operation. The working casing string permits rotational force as well as axial force to be applied to the drilling system from the surface during the drilling operation.
In another aspect of the invention, the drilling system comprises concentric strings of casing. The concentric strings of casing comprise a conductor pipe or outermost string of casing and casing strings of ever-decreasing diameter within the hollow interior of the conductor pipe. The drilling system further comprises at least one drill bit piece disposed at the dower end of the outermost string of casing. The concentric strings of casing are releasably connected to one another.
In operation, the drilling system is lowered into the wellbore on the working easing string. In some cases the drilling system is rotated by applying rotational force to the working casing string from the surface of the well. However, as described above, in some deepwater drilling operations, drilling into the well by rotation of the working string is not necessary because the formation is soft enough that the drilling system may merely be pushed downward into the formation to the desired depth when setting the conductor pipe. Pressurized fluid is introduced into the w~rking casing string while the drilling system is lowered into the wellbore.
When the drilling system is lowered to the desired depth, the downward movement and/or rotational movement stops. A cementing operation is then conducted to fill
working casing string is temporarily connected to the inner diameter of the innermost casing string of the drilling system by a threadable connection or tong assembly.
Fluid andlor mud may be pumped into the working casing string during the drilling operation. The working casing string permits rotational force as well as axial force to be applied to the drilling system from the surface during the drilling operation.
In another aspect of the invention, the drilling system comprises concentric strings of casing. The concentric strings of casing comprise a conductor pipe or outermost string of casing and casing strings of ever-decreasing diameter within the hollow interior of the conductor pipe. The drilling system further comprises at least one drill bit piece disposed at the dower end of the outermost string of casing. The concentric strings of casing are releasably connected to one another.
In operation, the drilling system is lowered into the wellbore on the working easing string. In some cases the drilling system is rotated by applying rotational force to the working casing string from the surface of the well. However, as described above, in some deepwater drilling operations, drilling into the well by rotation of the working string is not necessary because the formation is soft enough that the drilling system may merely be pushed downward into the formation to the desired depth when setting the conductor pipe. Pressurized fluid is introduced into the w~rking casing string while the drilling system is lowered into the wellbore.
When the drilling system is lowered to the desired depth, the downward movement and/or rotational movement stops. A cementing operation is then conducted to fill
5 the annular space between the wellbore and the conductor pipe. Next, a downward force is asserted on the working casing string from the surface of the weilbore. The downward force is calculated to break the connection between the drill bit piece of the conductor pipe and the drill bit piece of the first casing string. In the alternative embodiment, the force breaks the connection between the conductor pipe and the first string of casing. The conductor pipe remains cemented in the previously drilled hole with its drill bit piece attached to it, while the rest of the drilling system falls downward due to the pressure placed on the assembly. In the alternative embodiment, the conductor pipe remains cemented in the previously drilled hole while the entire drill bit piece falls downward with the remainder of the drilling system. This process is repeated until enough casing strings are placed in the wellbore to reach the desired depth. The innermost casing string retains the final remaining portion of the drill bit assembly. in the alternative embodiment, the entire drill bit piece is retained on the innermost casing string.
~ 5 The drilling system of the present invention and the method for using the drilling system allow multiple strings of casing to be set within the wellbore with only one run-in of the casing working string. The drill bit assembly of the present invention permits drilling of multiple holes of decreasing diameter within the wellbore with only one run-in of the drilling system. Furthermore, the drilling system of the present invention uses one drill bit assembly rather than requiring running in of a drill string or casing working string for each drill bit piece of decreasing diameter to drill holes in which to piece casing strings of decreasing diameter. Therefore, operating and equipment costs in a well completion operation using the drilling system with the drilling assembly are decreased.
BRIEF DESCRIPTI~N OF THE DRa4~fINC'S
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefily summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
~ 5 The drilling system of the present invention and the method for using the drilling system allow multiple strings of casing to be set within the wellbore with only one run-in of the casing working string. The drill bit assembly of the present invention permits drilling of multiple holes of decreasing diameter within the wellbore with only one run-in of the drilling system. Furthermore, the drilling system of the present invention uses one drill bit assembly rather than requiring running in of a drill string or casing working string for each drill bit piece of decreasing diameter to drill holes in which to piece casing strings of decreasing diameter. Therefore, operating and equipment costs in a well completion operation using the drilling system with the drilling assembly are decreased.
BRIEF DESCRIPTI~N OF THE DRa4~fINC'S
So that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefily summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.
6 Figure 1 is a cross-sectional view of one embodiment of the drilling system of the present invention iri the run-in configuration.
Figure 2 is a cross-sectional view of the drilling system of Figure 1 disposed in a wellbore after the drilling system is run into a desired depth within the wellbore, with a conductor pipe set within the wellbore.
Figure 3 is a cross-sectional view of the driliing system cf Figure 1 disposed in a welfbore, with the conductor pipe and a first casing string set within the wellbore.
Figure 4 is a cross-sectional view of the drilling system of Figure 1 disposed in a wellbore, with the conductor pipe, the first casing airing, and the second casing string set within the welibore Figure 5 is a top section view of the concentric casing strings of the present invention, taken along line 5-5 of Figure 1.
Figure 6 is a top section view of the drilling system of the present invention, taken along line 6-6 of Figure 1.
Figure 7 is a cross-sectional view of an alternative embodiment of the drilling system of the present invention in the run-in configuration.
~ETAILE~ ~ESCRIPTI~N ~F TFiE PREFERRED EIVIP~~IIIAENT
Figure 1 is a cross-sectional view of one ernbodiment of the drilling system 9 of the present invention in the run-in configuration. The drilling system 9 comprises three concentric strings of casing, including a conductor pipe ~ 2, a first casing string 15, and a second casing string 15. The conductor pipe 12 has a larger diameter than the first casing string 15, and the first casing string 15 has a larger diameter than the second casing string 1 ~. Thus, the second casing string 18 is located within the first casing string 15, which is located within the conductor pipe 12.
Although the drilling system 9 depicted in Figure 1 comprises three casing strings, any number of concentric strings of casing stay be used in the drilling system 9 of the present invention. Optionally, the drilling system 9 comprises wipers knot shown disposed in the annular space between the conductor pipe 12 and 'che first casing string and/or disposed in the annular space between t~,e first casing string 15 and the second casing string 18. The wipers prevent unwanted solids from migrating into the annular spaces between casing strings and debilitating the operation of the drill bit assembly, which is discussed below. Figure 5, which is taken along line 5-5 of Figure 1, shows the upper portion of the concentric strings of casing in a top section view.
A first drill bit piece 13 is disposed at the lower end of the conductor pipe 12.
In like manner, a second drill bit piece 16 is disposed at the Power end of the first casing string 15, and a third drill bit piece 1 g i.s disposed at the lower end of the second casing string 18. Although the drilling system 9 in Figure 1 shows three .casing strings with three drill bit pieces attached thereto, any number of drill bit pieces may be attached to any number of concentric strings of casing in the drilling system 9 of the present invention. The first drill bit piece 13 and second drill bit piece 16 jut outward and doo~,nward from the conductor pipe 12 and the first casing string 15, respectively. The drill bit pieces 13, 16, and 19 possess cutting structures 22, which are used to form a path for the casing through a formation 3f during the drilling operation. The cutting structures 22 are disposed on drill bit pieces 13, 16, and 19 on the lower end and the outside portion of each drill bit piece. The innermost casing string, in this case the second casing string 18, comprises a third drill bit piece 19 which juts outward and downward from the second casing string 18 and which also essentially fills the inner diameter of the second casing string 18.
Perforations 21 are formed within the third drill bit piece 19 through which fluid may flow during the well completion operation. Figure 6, which is taken along line 6-6 of Figure 1, represents a top section view of the drilling system 9, which shows the perforations 21.
Figure 6 represents a top section view of the drilling system 9 of the present invention, which comprises concentric casing strings 12, 15, and 18 with a drill bit assembly attached thereupon. The drill bit assembly is described in reference to Figure 1 as well as Figure 6. The drill bit assembly comprises a first drill bit piece 13 releasably connected to a second drill bit piece 16 by a first connector 14.
The assembly further comprises a third drill bit piece 19 releasably connected to the second drill bit piece 16 by a second connector 17. The releasable connections are preferably shearable connections, wherein the first connector 14 holds the first drill bit piece 13 to the second drill bit piece 16 with Vess force than the second connector 17 holds the second drill bit piece 16 to the third drill bit piece 19. The first drill bit piece 13, the second drill bit piece 1 C, and the third drill bit piece 19 are located on the lower ends of concentric casing strings 12, 18, and 18, respectively.
The first, second and third drill bit pieces, 13, 16, and 1~J respectively, possess cutting structures 22 on their outer and bottom surfaces. As described below, after the first drill bit piece 13 is released from the drill bit assembly, the cutting structures 22 on the outer surface of the second drily bit piece 16 are employed to drill through the formation 36 to a depth to set the first casing string 15.
Similarly, after the second drill bit piece 16 is released from the drill bit assembly, the cutting structures 22 on the outer surface of the third drill bit piece 19 are employed to drill through the formation 36 to a depth to set the second casing string 18.
As illustrated in Figure 1, the drilling system 9 also comprises hangers 23, which are located on the upper end of the conductor pipe 12. The hangers 23 maintain the drilling system 9 in place by engaging the surface 31 of the wellbore 30, preventing the drilling system 9 from experiencing further downward movement through the formation 36. Any member suitable for supporting the weight of the drilling system 9 may be used as a hanger 23.
A casing working string 10 is connected to the inner diameter of the second casing string 18. Any type of connection which produces a stronger force than the force produced by the connectors 14 and 17 may be used with the present invention.
Figure 1 shows a type of connection suitable for use v~rith the present invention. A
threadable connection 11 is shown between the casing working string '1O and the second casing string 18 which is unthreaded after the drilling operation is completed so that the casing working string '10 may be retrieved. Alternatively, the casing working string 10 may be shearabiy connected to the second casing string 18 by a tong assembly (not shown. The force produced by the shearable connection of the tong assembly must be greater than the force produced by the connectors 14 and 17. The tong assembly is connected to the lower end of the easing working string 10 and extends radially through the annular space between the casing working string 10 and the inner diameter of the second casing string 18. lJpon completion of the drilling operation, the shearable connection is broken by a longitudinal force so that the casing working string 10 may be retrieved from the welibore 30.
In the drilling system 9, the first drill bit piece 1 ~ is releasably connected to the second drill bit piece 16 by the first connector 14. Similarly, the second drill bit piece 16 is releasably connected to the third drill bit piece 10 by the second connector 17.
The releasable connection is preferably a shearable connection. The first connector 14 and the second connector 17 are any connectors capable of temporarily connecting the two drill bit pieces, including weight sheared pins or locking mechanisms. In the embodiment described above, the longitudinal force required to break the connection between the tong assembly and the second casing string 18 is more than the longitudinal force required to break the second connector 17. In the same way, the longitudinal force req~sired to break the second connector 17 is more than t6~e longitudinal force required to break the first connector 14.
Accordingly, the connection between the tong assembly and the second casing string 1 ~ is stronger than the second connector, and the connection produced by the second connector 17 is stronger than the connection produced by the first connector 14.
The annular space between casing wrings 12 and 15, as well as the annular space between casing strings 15 and 18, may comprise sealing members (not shown) to prevent migration of unwanted fluid and solids into the annular spaces until the designated point in the dr°illing operation. The sealing members prevent fluid flow into the annular spaces, thus forcing setting fluid to flow into the desired area outside of the casing string being set. The seating members are released along with their respective connectors 14 and 17 at the designated step in the operation.
Figure 7 shows an alternative embodiment of the drilling system 9 of the present invention in the run-in configuration. In this embodiment, the drilling system 9 is identical to the drilling system of Figure 1 except for the connectors of the drilling system 9 and the drill bit pieces. The numbers used to identify parts of Figure 1 correspond to the numbers used to identify the same parts of Figure 7. In the embodiment of Figure 7, one drill bit piece 40 is disposed at the lower end of the innermost casing string, which is the second casing string 1~. Again, any number of concentric casing strings may be employed in the present invention. The drill bit piece 40 comprises perforations 21 which run therethroogh and allow fluid flow through the casing working string 10 and into the forrrsation 35. A first connector 41 releasably connects the conductor pipe 12 to the first string of casing 15.
~imilarfy, a second connector 42 releasably connects the first string of easing 15 to the second string of casing 18. The releasable connection is preferably a shearable connection created by either weight sheared pins or locking mechanisms. The force required to release the second connector 42 is greater than the force required to release the first connector 41. Likewise, the force created by the threadable connection 11 or tong assembly (not shown) is greater than the force required to release the second connector 42.
1n a further alternative embodiment, the drilling system 9 may employ a torque key system (not shown). ~ torque key system comprises keys (not shown) located on the inner casing string of the concentric strings of casing which engage slots (not shown) formed in the outer casing string of the concentric strings of casing.
The drill bit pieces 13, 16, and 19 of Figure 1 and 40 of Figure ~ comprise a cutting structure (not shown) located above an inverted portion (not shown) of the casing strings 12 and 15. The 'First torque key system (not shown) comprises keys (not shown) disposed on the first casing string 15 and slots (not shown) disposed on the conductor pipe 12. When the drilling system 9 is used to drill to the desired depth within the f~rmation 36 to set the conductor pipe 12, the keys disposed on the first casing string 15 remain engaged within the slots disposed in the conductor pipe 12, thus restricting rotational movement of the first casing string 15 relative to the conductor pipe 12 so that the first casing string 15 and the conductor pipe 12 translate together. After the drilling system 9 has drilled to the desired depth within the wellbore 30, the key on the first casing string 15 is released from the slot in the conductor pipe 12, thereby allowing rotational as well as longitudinal movement of the first casing string 15 relative to the conductor pipe 12. Next, the inverted portion of the conductor pipe 12 is milled off by the cutting structure located above the inverted portion of the conductor pipe 12 s~ that the drill bit piecel6 may operate to drill to the second designated depth within the wellbore 30 while the second torque key system of the first casing string 15 and the second casing string 18 remains engaged. The second torque key system operates in the same way as 'the first torque key system.
In a further embodiment, a spline connection (not shown) may be utilized in place of the torque key system to restrict rotational movement of the conductor pipe 12 relative to the first casing string 15. In this embodiment, the conductor pipe 12 and the first casing string 15 possess a spline connection (not shown). The spline connection comprises grooves (not shown) formed ora an inner surface of the conductor pipe 12 which mate with splines (not shown) formed on an outer surface of the first casing string 15. The spline, when engaged, allows the first casing string and the conductor pipe 12 to translate rotationally together when the drilling system 9 is drilled to the desired depth, while at the same time allowing the first 10 casing string 15 and the conductor pipe 12 to rriove axially relative to one another.
Then the releasable connection between the first casing string 15 and the conductor pipe 12 is released, the two casing strings '12 and 15 are permitted to rotate relative to one another. A second spline connection (not shown) may also be disposed on the first casing string 15 and the second casing string 13.
15 Figures 2, 3, and 4 depict the first embodiment of the drilling system 9 of Figure 1 in operation. Figure 2 is a cross-sectional view of the drilling system 9 of the present invention disposed in a wellbore 30, with the conductor pipe 12 set within the wellbore 30. Figure 3 is a cross-sectional view of the drilling system 9 of the present invention disposed in a wellbore 30, with the conductor pipe 12 and the first casing string 15 set within the wellbore 30. Figure 4 is a cross-sectional view of the drilling system 9 of the present invention disposed in a wellbore 30, with the conductor pipe 12, the first casing string 15, and the second casing string 18 set within the wellbore 30.
In operation, the drilling system 9 is connected to the casing working string running therethrough. As shown in Figures 1 and 7, the casing working string with the drilling system 9 connected is run into a weflbore 30 within the formation 36.
tNhile running the casing working string 10 into the wellbore 30, a longitudinal force arid a rotational force are applied from the surface 31 upon the casing working string 10. Alternatively, if the formation 36 is sufficiently soft such as in deepwater drilling operations, only a longitudinal force is necessary to run the drilling system 9 into the desired depth within the wellbore 30 to set the conductor pipe 12.
~'ressurized fluid is introduced into the bore 33 of the casing working string 10 concurrently with running the casing working string 10 into the wellbore 30 so that the fluid and mud that would ordinarily flow upward through the inner diameter of the casing working string 10 are forced to flow upward through the annular space between the conductor pipe 12 and the wellbore 30.
As shown in Figure 2, when the entire length of the conductor pipe 12 is run into the wellbore 30 so that the hangers 23 apply pressure upon the surface 31, the longitudinal force andlor rotational force exerted on the casing working string 10 is halted. A cementing operation is then conducted in order to fill an annular area between the wellbore 30 and the conductor pipe 12 with cement 34.
Alternatively, if the friction of the welibore 30 is sufficient to hold the conductor pipe 12 in place, a cementing operation is not necessary. Figure 2 shows the conductor pipe 12 set within the wellbore 30.
Subsequently, a first longitudinal force is applied to the casing working string 10 from the surface 31. The first longitudinal force breaks the releasable connection between the first drill bit piece 13 and the second drill bit piece 16 that is formed by the first connector 14. Rotational force and longitudinal force are again applied to the casing working string 10 from the surface 31. The remainder of the drilling system g exerts rotational and longitudinal force on the formation 36 so that a deeper hole is formed within the wellbore 30 for setting the first casing string 15.
This hole is necessarily smaller in diameter than the first hole formed because the drill bit assembly is missing the first drill bit piece 13 and is therefore of decreased diameter.
Pressurized fluid is introduced into the bore 33 of the casing working string concurrently with running the drilling system 9 further downward into the weilbore 30 so that the fluid and mud that would ordinarily flow upward through the inner diameter of the casing working string i 0 are forced to flow upward in the annular space between the outer diameter of the first casing string 1 ~ and the inner diameter of the conductor pipe 12.
As shown in Figure 3, when the first casing strinr~ 15 is drilled to the desired depth within the wellbore 30, the longitudinal and rotational forces applied on the casing working string 10 are again halted. A cementing operation is then conducted in order to fill an annular area between the conductor pipe 12 and the first casing string 15 with cement 34. Figure 3 shows the first casing string 15 along with the conductor pipe 12 set within the wellbore 30.
In the next step of the drilling operation, a second longitudinal force is applied to the casing working string 10 from the surface 31. This second longitudinal force is greater than the first longitudinal force, as the second longitudinal force must apply enough pressure to the casing working string 10 to break the releasable connection between the second drill bit piece 16 and the third drill bit piece 19 formed by the second connector 17. Longitudinal and rotational forces are again applied to the remaining portion of the drilling system 9 so that the formation 36 is drilled to the desired depth by the remaining portion of the drill bit assembly. Again, pressurized fluid is run into the bore 33 in the casing working string 10 from the surface concurrent with the rotational and longitudinal force to prevent mud and fluid from traveling upward through the casing working string 10. ~~'he mud and fluid introduced into the casing working string 10 exit the system by flowing upward to the surface 31
Figure 2 is a cross-sectional view of the drilling system of Figure 1 disposed in a wellbore after the drilling system is run into a desired depth within the wellbore, with a conductor pipe set within the wellbore.
Figure 3 is a cross-sectional view of the driliing system cf Figure 1 disposed in a welfbore, with the conductor pipe and a first casing string set within the wellbore.
Figure 4 is a cross-sectional view of the drilling system of Figure 1 disposed in a wellbore, with the conductor pipe, the first casing airing, and the second casing string set within the welibore Figure 5 is a top section view of the concentric casing strings of the present invention, taken along line 5-5 of Figure 1.
Figure 6 is a top section view of the drilling system of the present invention, taken along line 6-6 of Figure 1.
Figure 7 is a cross-sectional view of an alternative embodiment of the drilling system of the present invention in the run-in configuration.
~ETAILE~ ~ESCRIPTI~N ~F TFiE PREFERRED EIVIP~~IIIAENT
Figure 1 is a cross-sectional view of one ernbodiment of the drilling system 9 of the present invention in the run-in configuration. The drilling system 9 comprises three concentric strings of casing, including a conductor pipe ~ 2, a first casing string 15, and a second casing string 15. The conductor pipe 12 has a larger diameter than the first casing string 15, and the first casing string 15 has a larger diameter than the second casing string 1 ~. Thus, the second casing string 18 is located within the first casing string 15, which is located within the conductor pipe 12.
Although the drilling system 9 depicted in Figure 1 comprises three casing strings, any number of concentric strings of casing stay be used in the drilling system 9 of the present invention. Optionally, the drilling system 9 comprises wipers knot shown disposed in the annular space between the conductor pipe 12 and 'che first casing string and/or disposed in the annular space between t~,e first casing string 15 and the second casing string 18. The wipers prevent unwanted solids from migrating into the annular spaces between casing strings and debilitating the operation of the drill bit assembly, which is discussed below. Figure 5, which is taken along line 5-5 of Figure 1, shows the upper portion of the concentric strings of casing in a top section view.
A first drill bit piece 13 is disposed at the lower end of the conductor pipe 12.
In like manner, a second drill bit piece 16 is disposed at the Power end of the first casing string 15, and a third drill bit piece 1 g i.s disposed at the lower end of the second casing string 18. Although the drilling system 9 in Figure 1 shows three .casing strings with three drill bit pieces attached thereto, any number of drill bit pieces may be attached to any number of concentric strings of casing in the drilling system 9 of the present invention. The first drill bit piece 13 and second drill bit piece 16 jut outward and doo~,nward from the conductor pipe 12 and the first casing string 15, respectively. The drill bit pieces 13, 16, and 19 possess cutting structures 22, which are used to form a path for the casing through a formation 3f during the drilling operation. The cutting structures 22 are disposed on drill bit pieces 13, 16, and 19 on the lower end and the outside portion of each drill bit piece. The innermost casing string, in this case the second casing string 18, comprises a third drill bit piece 19 which juts outward and downward from the second casing string 18 and which also essentially fills the inner diameter of the second casing string 18.
Perforations 21 are formed within the third drill bit piece 19 through which fluid may flow during the well completion operation. Figure 6, which is taken along line 6-6 of Figure 1, represents a top section view of the drilling system 9, which shows the perforations 21.
Figure 6 represents a top section view of the drilling system 9 of the present invention, which comprises concentric casing strings 12, 15, and 18 with a drill bit assembly attached thereupon. The drill bit assembly is described in reference to Figure 1 as well as Figure 6. The drill bit assembly comprises a first drill bit piece 13 releasably connected to a second drill bit piece 16 by a first connector 14.
The assembly further comprises a third drill bit piece 19 releasably connected to the second drill bit piece 16 by a second connector 17. The releasable connections are preferably shearable connections, wherein the first connector 14 holds the first drill bit piece 13 to the second drill bit piece 16 with Vess force than the second connector 17 holds the second drill bit piece 16 to the third drill bit piece 19. The first drill bit piece 13, the second drill bit piece 1 C, and the third drill bit piece 19 are located on the lower ends of concentric casing strings 12, 18, and 18, respectively.
The first, second and third drill bit pieces, 13, 16, and 1~J respectively, possess cutting structures 22 on their outer and bottom surfaces. As described below, after the first drill bit piece 13 is released from the drill bit assembly, the cutting structures 22 on the outer surface of the second drily bit piece 16 are employed to drill through the formation 36 to a depth to set the first casing string 15.
Similarly, after the second drill bit piece 16 is released from the drill bit assembly, the cutting structures 22 on the outer surface of the third drill bit piece 19 are employed to drill through the formation 36 to a depth to set the second casing string 18.
As illustrated in Figure 1, the drilling system 9 also comprises hangers 23, which are located on the upper end of the conductor pipe 12. The hangers 23 maintain the drilling system 9 in place by engaging the surface 31 of the wellbore 30, preventing the drilling system 9 from experiencing further downward movement through the formation 36. Any member suitable for supporting the weight of the drilling system 9 may be used as a hanger 23.
A casing working string 10 is connected to the inner diameter of the second casing string 18. Any type of connection which produces a stronger force than the force produced by the connectors 14 and 17 may be used with the present invention.
Figure 1 shows a type of connection suitable for use v~rith the present invention. A
threadable connection 11 is shown between the casing working string '1O and the second casing string 18 which is unthreaded after the drilling operation is completed so that the casing working string '10 may be retrieved. Alternatively, the casing working string 10 may be shearabiy connected to the second casing string 18 by a tong assembly (not shown. The force produced by the shearable connection of the tong assembly must be greater than the force produced by the connectors 14 and 17. The tong assembly is connected to the lower end of the easing working string 10 and extends radially through the annular space between the casing working string 10 and the inner diameter of the second casing string 18. lJpon completion of the drilling operation, the shearable connection is broken by a longitudinal force so that the casing working string 10 may be retrieved from the welibore 30.
In the drilling system 9, the first drill bit piece 1 ~ is releasably connected to the second drill bit piece 16 by the first connector 14. Similarly, the second drill bit piece 16 is releasably connected to the third drill bit piece 10 by the second connector 17.
The releasable connection is preferably a shearable connection. The first connector 14 and the second connector 17 are any connectors capable of temporarily connecting the two drill bit pieces, including weight sheared pins or locking mechanisms. In the embodiment described above, the longitudinal force required to break the connection between the tong assembly and the second casing string 18 is more than the longitudinal force required to break the second connector 17. In the same way, the longitudinal force req~sired to break the second connector 17 is more than t6~e longitudinal force required to break the first connector 14.
Accordingly, the connection between the tong assembly and the second casing string 1 ~ is stronger than the second connector, and the connection produced by the second connector 17 is stronger than the connection produced by the first connector 14.
The annular space between casing wrings 12 and 15, as well as the annular space between casing strings 15 and 18, may comprise sealing members (not shown) to prevent migration of unwanted fluid and solids into the annular spaces until the designated point in the dr°illing operation. The sealing members prevent fluid flow into the annular spaces, thus forcing setting fluid to flow into the desired area outside of the casing string being set. The seating members are released along with their respective connectors 14 and 17 at the designated step in the operation.
Figure 7 shows an alternative embodiment of the drilling system 9 of the present invention in the run-in configuration. In this embodiment, the drilling system 9 is identical to the drilling system of Figure 1 except for the connectors of the drilling system 9 and the drill bit pieces. The numbers used to identify parts of Figure 1 correspond to the numbers used to identify the same parts of Figure 7. In the embodiment of Figure 7, one drill bit piece 40 is disposed at the lower end of the innermost casing string, which is the second casing string 1~. Again, any number of concentric casing strings may be employed in the present invention. The drill bit piece 40 comprises perforations 21 which run therethroogh and allow fluid flow through the casing working string 10 and into the forrrsation 35. A first connector 41 releasably connects the conductor pipe 12 to the first string of casing 15.
~imilarfy, a second connector 42 releasably connects the first string of easing 15 to the second string of casing 18. The releasable connection is preferably a shearable connection created by either weight sheared pins or locking mechanisms. The force required to release the second connector 42 is greater than the force required to release the first connector 41. Likewise, the force created by the threadable connection 11 or tong assembly (not shown) is greater than the force required to release the second connector 42.
1n a further alternative embodiment, the drilling system 9 may employ a torque key system (not shown). ~ torque key system comprises keys (not shown) located on the inner casing string of the concentric strings of casing which engage slots (not shown) formed in the outer casing string of the concentric strings of casing.
The drill bit pieces 13, 16, and 19 of Figure 1 and 40 of Figure ~ comprise a cutting structure (not shown) located above an inverted portion (not shown) of the casing strings 12 and 15. The 'First torque key system (not shown) comprises keys (not shown) disposed on the first casing string 15 and slots (not shown) disposed on the conductor pipe 12. When the drilling system 9 is used to drill to the desired depth within the f~rmation 36 to set the conductor pipe 12, the keys disposed on the first casing string 15 remain engaged within the slots disposed in the conductor pipe 12, thus restricting rotational movement of the first casing string 15 relative to the conductor pipe 12 so that the first casing string 15 and the conductor pipe 12 translate together. After the drilling system 9 has drilled to the desired depth within the wellbore 30, the key on the first casing string 15 is released from the slot in the conductor pipe 12, thereby allowing rotational as well as longitudinal movement of the first casing string 15 relative to the conductor pipe 12. Next, the inverted portion of the conductor pipe 12 is milled off by the cutting structure located above the inverted portion of the conductor pipe 12 s~ that the drill bit piecel6 may operate to drill to the second designated depth within the wellbore 30 while the second torque key system of the first casing string 15 and the second casing string 18 remains engaged. The second torque key system operates in the same way as 'the first torque key system.
In a further embodiment, a spline connection (not shown) may be utilized in place of the torque key system to restrict rotational movement of the conductor pipe 12 relative to the first casing string 15. In this embodiment, the conductor pipe 12 and the first casing string 15 possess a spline connection (not shown). The spline connection comprises grooves (not shown) formed ora an inner surface of the conductor pipe 12 which mate with splines (not shown) formed on an outer surface of the first casing string 15. The spline, when engaged, allows the first casing string and the conductor pipe 12 to translate rotationally together when the drilling system 9 is drilled to the desired depth, while at the same time allowing the first 10 casing string 15 and the conductor pipe 12 to rriove axially relative to one another.
Then the releasable connection between the first casing string 15 and the conductor pipe 12 is released, the two casing strings '12 and 15 are permitted to rotate relative to one another. A second spline connection (not shown) may also be disposed on the first casing string 15 and the second casing string 13.
15 Figures 2, 3, and 4 depict the first embodiment of the drilling system 9 of Figure 1 in operation. Figure 2 is a cross-sectional view of the drilling system 9 of the present invention disposed in a wellbore 30, with the conductor pipe 12 set within the wellbore 30. Figure 3 is a cross-sectional view of the drilling system 9 of the present invention disposed in a wellbore 30, with the conductor pipe 12 and the first casing string 15 set within the wellbore 30. Figure 4 is a cross-sectional view of the drilling system 9 of the present invention disposed in a wellbore 30, with the conductor pipe 12, the first casing string 15, and the second casing string 18 set within the wellbore 30.
In operation, the drilling system 9 is connected to the casing working string running therethrough. As shown in Figures 1 and 7, the casing working string with the drilling system 9 connected is run into a weflbore 30 within the formation 36.
tNhile running the casing working string 10 into the wellbore 30, a longitudinal force arid a rotational force are applied from the surface 31 upon the casing working string 10. Alternatively, if the formation 36 is sufficiently soft such as in deepwater drilling operations, only a longitudinal force is necessary to run the drilling system 9 into the desired depth within the wellbore 30 to set the conductor pipe 12.
~'ressurized fluid is introduced into the bore 33 of the casing working string 10 concurrently with running the casing working string 10 into the wellbore 30 so that the fluid and mud that would ordinarily flow upward through the inner diameter of the casing working string 10 are forced to flow upward through the annular space between the conductor pipe 12 and the wellbore 30.
As shown in Figure 2, when the entire length of the conductor pipe 12 is run into the wellbore 30 so that the hangers 23 apply pressure upon the surface 31, the longitudinal force andlor rotational force exerted on the casing working string 10 is halted. A cementing operation is then conducted in order to fill an annular area between the wellbore 30 and the conductor pipe 12 with cement 34.
Alternatively, if the friction of the welibore 30 is sufficient to hold the conductor pipe 12 in place, a cementing operation is not necessary. Figure 2 shows the conductor pipe 12 set within the wellbore 30.
Subsequently, a first longitudinal force is applied to the casing working string 10 from the surface 31. The first longitudinal force breaks the releasable connection between the first drill bit piece 13 and the second drill bit piece 16 that is formed by the first connector 14. Rotational force and longitudinal force are again applied to the casing working string 10 from the surface 31. The remainder of the drilling system g exerts rotational and longitudinal force on the formation 36 so that a deeper hole is formed within the wellbore 30 for setting the first casing string 15.
This hole is necessarily smaller in diameter than the first hole formed because the drill bit assembly is missing the first drill bit piece 13 and is therefore of decreased diameter.
Pressurized fluid is introduced into the bore 33 of the casing working string concurrently with running the drilling system 9 further downward into the weilbore 30 so that the fluid and mud that would ordinarily flow upward through the inner diameter of the casing working string i 0 are forced to flow upward in the annular space between the outer diameter of the first casing string 1 ~ and the inner diameter of the conductor pipe 12.
As shown in Figure 3, when the first casing strinr~ 15 is drilled to the desired depth within the wellbore 30, the longitudinal and rotational forces applied on the casing working string 10 are again halted. A cementing operation is then conducted in order to fill an annular area between the conductor pipe 12 and the first casing string 15 with cement 34. Figure 3 shows the first casing string 15 along with the conductor pipe 12 set within the wellbore 30.
In the next step of the drilling operation, a second longitudinal force is applied to the casing working string 10 from the surface 31. This second longitudinal force is greater than the first longitudinal force, as the second longitudinal force must apply enough pressure to the casing working string 10 to break the releasable connection between the second drill bit piece 16 and the third drill bit piece 19 formed by the second connector 17. Longitudinal and rotational forces are again applied to the remaining portion of the drilling system 9 so that the formation 36 is drilled to the desired depth by the remaining portion of the drill bit assembly. Again, pressurized fluid is run into the bore 33 in the casing working string 10 from the surface concurrent with the rotational and longitudinal force to prevent mud and fluid from traveling upward through the casing working string 10. ~~'he mud and fluid introduced into the casing working string 10 exit the system by flowing upward to the surface 31
7 5 through the annular space between the first casing string 15 and the second casing string 18. T he hole that is formed by the remaining portion of the drilling system 9 is even smaller than the previous hole drilled by the drilling system 9 to set the first casing string 15 because the second drill bit piece 16 has released from the drill bit assembly, thus further decreasing the diameter of the drill bit assembly.
As shown in I=igure 4, when the drilling system 9 has been drilled into the formation 36 to the desired depth to set the second casing string 18, the longitudinal and rotational forces are again halted. A cementing operation is then conducted in order to fill an annular area between the first casing string 15 and the second casing string 18 with cement 34, thus setting the second casing string 18. The completed operation is shown in Figure 4.
At the end of the drilling operation, the remainder of the drilling system 9, which comprises the third drill bit piece 19 and the second casing string 18, permanently resides in the wellbore 30. The threadable connection 11 is disconnected from the inner diameter of the second casing string 18, and the casing working string 10 and the threadabfe connection 11 are removed from the wellbore 30.
The second embodiment depicted in Figure 7 ~nrorks ire much the same way as the first embodiment of the present invention, with minor differences. Instead of using longitudinal force to release the connectors 14 and 17 between the drill bit pieces, the force is used to release the connectors 41 and 42 between the concentric strings of casing 12, 15, and 18. A first longitudinal force is used to break the first connector 41 between the conductor pipe 12 and the first casing string 15. A
second, greater longitudinal force is used to break the second connector 42 between the first string of casing 15 and the second string of casing 18. Finally, the threadable connection 11 is unthreaded after the drilling operation is completed so that the casing working string 10 may be retrieved. Alternatively, a third, even greater longitudinal force may used to break the shearable connection between the tong assembly (not shown) and the second casing string 18. because drill bit pieces are not disposed at the lower end of casing strings 12 and 15, drill bit pieces are not left within the welibore during the course of the operation, but remain attached to the drilling system 9 until the final stage. The drill bit piece 40 is carried with the second casing string 18 during the entire operation and remains attached to the second string of casing 18 within the wellbore upon completion of the drilling operation. In any of the embodiments described above, the connectors 14 and 17 or the connectors 41 and 42 may alternatively comprise an assembly which is removable from the surface using wireline, tubing, or drill pipe at the end of drilling operation.
Furthermore, the connectors 14 and 17 and the connectors 41 and 42 may comprise an assembly that may be demactivated from the surface 31 of the wellbore 30 by pressure within the casing strings 12, 15, and 18.
An alternate method (not shown) of setting the casing strings 12, 15, and 18 within the wellbore 30 involves using any of the above methods to drill the casing strings 12, 15, and 18 to the desired depth within the we~llbore 30. However, instead of conducting a cementing operation at each stage in the operation after eactl casing string has reached its desired depth within the wellbore 30, each of tile casing strings 12, 15, and 18 are lowered to the final depth of the entire drilling system 9 (as shown in Figure 4). Figure 4 is used for illustrative purposes in the description below, although other embodiments of tile drilling system 9 described above may be used to accomplish this alternative method. -I-he drilling system 9 is lowered to the desired depth for setting the conductor pipe 12 by rotational and longitudinal forces.
Then, the rotational force is halted and the longitudinal force is utilized to release the first connector 14.. The conductor pipe 12 is fixed longitudinally and rotationally within the welibore 30 by the portion 45 of the formation 36 which extends beyond the remaining portion of the drilling system 9. The remaining portion of the drilling system 9 which comprises the first string of casing 15 and the second oaring string 18 is drilled to the second desired depth within the wellbore 30, and the process is repeated until the entire drilling system g has telescoped to the desired depth within the wellbore 30. Then, a cementing operation is conducted to set all of the casing strings 12, 15, and 18 within the wellbore 30 at the same time.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
As shown in I=igure 4, when the drilling system 9 has been drilled into the formation 36 to the desired depth to set the second casing string 18, the longitudinal and rotational forces are again halted. A cementing operation is then conducted in order to fill an annular area between the first casing string 15 and the second casing string 18 with cement 34, thus setting the second casing string 18. The completed operation is shown in Figure 4.
At the end of the drilling operation, the remainder of the drilling system 9, which comprises the third drill bit piece 19 and the second casing string 18, permanently resides in the wellbore 30. The threadable connection 11 is disconnected from the inner diameter of the second casing string 18, and the casing working string 10 and the threadabfe connection 11 are removed from the wellbore 30.
The second embodiment depicted in Figure 7 ~nrorks ire much the same way as the first embodiment of the present invention, with minor differences. Instead of using longitudinal force to release the connectors 14 and 17 between the drill bit pieces, the force is used to release the connectors 41 and 42 between the concentric strings of casing 12, 15, and 18. A first longitudinal force is used to break the first connector 41 between the conductor pipe 12 and the first casing string 15. A
second, greater longitudinal force is used to break the second connector 42 between the first string of casing 15 and the second string of casing 18. Finally, the threadable connection 11 is unthreaded after the drilling operation is completed so that the casing working string 10 may be retrieved. Alternatively, a third, even greater longitudinal force may used to break the shearable connection between the tong assembly (not shown) and the second casing string 18. because drill bit pieces are not disposed at the lower end of casing strings 12 and 15, drill bit pieces are not left within the welibore during the course of the operation, but remain attached to the drilling system 9 until the final stage. The drill bit piece 40 is carried with the second casing string 18 during the entire operation and remains attached to the second string of casing 18 within the wellbore upon completion of the drilling operation. In any of the embodiments described above, the connectors 14 and 17 or the connectors 41 and 42 may alternatively comprise an assembly which is removable from the surface using wireline, tubing, or drill pipe at the end of drilling operation.
Furthermore, the connectors 14 and 17 and the connectors 41 and 42 may comprise an assembly that may be demactivated from the surface 31 of the wellbore 30 by pressure within the casing strings 12, 15, and 18.
An alternate method (not shown) of setting the casing strings 12, 15, and 18 within the wellbore 30 involves using any of the above methods to drill the casing strings 12, 15, and 18 to the desired depth within the we~llbore 30. However, instead of conducting a cementing operation at each stage in the operation after eactl casing string has reached its desired depth within the wellbore 30, each of tile casing strings 12, 15, and 18 are lowered to the final depth of the entire drilling system 9 (as shown in Figure 4). Figure 4 is used for illustrative purposes in the description below, although other embodiments of tile drilling system 9 described above may be used to accomplish this alternative method. -I-he drilling system 9 is lowered to the desired depth for setting the conductor pipe 12 by rotational and longitudinal forces.
Then, the rotational force is halted and the longitudinal force is utilized to release the first connector 14.. The conductor pipe 12 is fixed longitudinally and rotationally within the welibore 30 by the portion 45 of the formation 36 which extends beyond the remaining portion of the drilling system 9. The remaining portion of the drilling system 9 which comprises the first string of casing 15 and the second oaring string 18 is drilled to the second desired depth within the wellbore 30, and the process is repeated until the entire drilling system g has telescoped to the desired depth within the wellbore 30. Then, a cementing operation is conducted to set all of the casing strings 12, 15, and 18 within the wellbore 30 at the same time.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (36)
1. A method for setting at least two strings of casing within a wellbore, the at least two strings of casing comprising a second string of casing disposed within a first string of casing, comprising:
running a casing working string into the wellbore, the casing working string releasably connected to:
the at least two strings of casing releasably connected to one another; and a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
setting the first string of casing within the wellbore;
releasing the releasable connection between the first string of casing and the second string of casing;
running the casing working string into the wellbore to a second depth while applying rotational force to the drill bit piece; and setting the second string of casing within the wellbore.
running a casing working string into the wellbore, the casing working string releasably connected to:
the at least two strings of casing releasably connected to one another; and a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
setting the first string of casing within the wellbore;
releasing the releasable connection between the first string of casing and the second string of casing;
running the casing working string into the wellbore to a second depth while applying rotational force to the drill bit piece; and setting the second string of casing within the wellbore.
2. The method of claim 1, further comprising disconnecting the casing working string from the strings of casing and retrieving the casing working string from the wellbore.
3. The method of claim 1, further comprising introducing pressurized fluid into the casing working string while running the casing working string into the wellbore to a first depth and while running the casing working string into the wellbore to the second depth.
4. The method of claim 1, wherein setting the strings of casing comprises introducing setting fluid into an annular area between the wellbore and the string of casing which is being set.
5. The method of claim 1, wherein a setting fluid is introduced into an annular area between the wellbore and the strings of casing only after the casing working string is run into the wellbore to the second depth.
6. The method of claim 1, wherein the rotational force is discontinued before setting the strings of casing within the wellbore.
7. The method of claim 1, wherein the rotational force is supplied by a top drive motor or a rotary table at a surface of the wellbore.
8. A method for setting at least three strings of casing within a wellbore, the at least three strings of casing comprising a second string of casing disposed within a first string of casing and a third string of casing disposed within the second string of casing, comprising:
running a casing working string into the wellbore while applying rotational force to the casing working string, the casing working string releasably connected to:
the at least three strings of casing; and drill bit pieces disposed at the lower end of each string of casing, the drill bit pieces releasably connected to each other;
setting the first string of casing within the wellbore;
applying a first force to break a releasable connection between the first string of casing and the second string of casing;
running the casing working string into the wellbore to a second depth while applying rotational force to the casing working string;
setting the second string of casing within the wellbore;
applying a second force to break a releasable connection between the second string of casing and the third string of casing;
running the casing working string into the wellbore to a third depth while applying rotational force to the casing working string; and setting the third string of casing within the wellbore.
running a casing working string into the wellbore while applying rotational force to the casing working string, the casing working string releasably connected to:
the at least three strings of casing; and drill bit pieces disposed at the lower end of each string of casing, the drill bit pieces releasably connected to each other;
setting the first string of casing within the wellbore;
applying a first force to break a releasable connection between the first string of casing and the second string of casing;
running the casing working string into the wellbore to a second depth while applying rotational force to the casing working string;
setting the second string of casing within the wellbore;
applying a second force to break a releasable connection between the second string of casing and the third string of casing;
running the casing working string into the wellbore to a third depth while applying rotational force to the casing working string; and setting the third string of casing within the wellbore.
9. The method of claim 8, further comprising disconnecting the casing working string from the at least three strings of casing and retrieving the casing working string from the wellbore.
10. The method of claim 8, further comprising introducing pressurized fluid into the casing working string while running the casing working string into the wellbore to a first depth, while running the casing working string to a second depth, and while running the casing working string into the wellbore to a third depth.
11. The method of claim 8, wherein setting the at least three strings of casing comprises introducing setting fluid into an annular area between the wellbore and the string of casing which is being set.
12. The method of claim 8, wherein a setting fluid is introduced into an annular area between the wellbore and the at least three strings of casing only after the casing working string is run into the wellbore to the third depth.
13. The method of claim 8, wherein the rotational force is discontinued before setting the at least three strings of casing within the wellbore.
14. The method of claim 8, wherein the rotational force is supplied by a top drive motor or a rotary table at a surface of the wellbore.
15. The method of claim 8, wherein the second force is greater than the first force.
16. A method of drilling with casing comprising:
forming a first section of wellbore with a first casing string, the first casing string having a bore forming member at a lower end thereof; and forming a second section of wellbore with a second casing string, the second casing string selectively extending telescopically from the lower end of the first casing string, wherein the first section of wellbore has a larger diameter than the second section of wellbore.
forming a first section of wellbore with a first casing string, the first casing string having a bore forming member at a lower end thereof; and forming a second section of wellbore with a second casing string, the second casing string selectively extending telescopically from the lower end of the first casing string, wherein the first section of wellbore has a larger diameter than the second section of wellbore.
17. A drilling system for setting concentric casing strings within a wellbore, comprising:
at least three strings of casing concentrically disposed;
a connector releasably connecting each adjacent strings of casing; and a drill bit piece disposed at the lower end of at least one of the at least three strings of casing, wherein the force required to release the connectors increases as the diameter of the strings of casing decreases.
at least three strings of casing concentrically disposed;
a connector releasably connecting each adjacent strings of casing; and a drill bit piece disposed at the lower end of at least one of the at least three strings of casing, wherein the force required to release the connectors increases as the diameter of the strings of casing decreases.
18. A drilling system for setting concentric casing strings within a wellbore, comprising:
at least three strings of casing concentrically disposed;
a connector releasably connecting each adjacent strings of casing; and a drill bit piece disposed at the lower end of at least one of the at least three strings of casing, wherein the connectors comprises an assembly that can be deactivated from the surface of the wellbore by establishing sufficient pressure within the casing strings.
at least three strings of casing concentrically disposed;
a connector releasably connecting each adjacent strings of casing; and a drill bit piece disposed at the lower end of at least one of the at least three strings of casing, wherein the connectors comprises an assembly that can be deactivated from the surface of the wellbore by establishing sufficient pressure within the casing strings.
19. A drilling system for setting concentric casing strings within a wellbore, comprising:
at least two strings of casing, wherein the outer diameter of the inner string of casing is smaller than the inner diameter of the outer string of casing;
a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
a connector which releasably connects adjacent casing strings; and a wiper disposed between the at least two strings of casing.
at least two strings of casing, wherein the outer diameter of the inner string of casing is smaller than the inner diameter of the outer string of casing;
a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
a connector which releasably connects adjacent casing strings; and a wiper disposed between the at least two strings of casing.
20. A drilling system for setting concentric casing strings within a wellbore, comprising:
at least two strings of casing, wherein the outer diameter of the inner string of casing is smaller than the inner diameter of the outer string of casing;
a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
a connector which releasably connects adjacent casing strings; and a torque key system, wherein the torque key system prevents rotational translation of the at least two strings of casing relative to one another.
at least two strings of casing, wherein the outer diameter of the inner string of casing is smaller than the inner diameter of the outer string of casing;
a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
a connector which releasably connects adjacent casing strings; and a torque key system, wherein the torque key system prevents rotational translation of the at least two strings of casing relative to one another.
21. A drilling system for setting concentric casing strings within a wellbore, comprising:
at least two strings of casing, wherein the outer diameter of the inner string of casing is smaller than the inner diameter of the outer string of casing;
a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
a connector which releasably connects adjacent casing strings; and a spline assembly, wherein the spline assembly prevents rotational translation of the at least two strings of casing relative to one another.
at least two strings of casing, wherein the outer diameter of the inner string of casing is smaller than the inner diameter of the outer string of casing;
a drill bit piece disposed at the lower end of at least one of the at least two strings of casing;
a connector which releasably connects adjacent casing strings; and a spline assembly, wherein the spline assembly prevents rotational translation of the at least two strings of casing relative to one another.
22. A drilling system for setting concentric casing strings within a wellbore, comprising:
an inner string of casing concentrically disposed within an outer string of casing;
a connector for releasably connecting the inner string to the outer string;
a first drilling member connected to the inner string; and a circumferential drilling member connected to the outer string, wherein the drilling members are separable when the inner string is released from the outer string.
an inner string of casing concentrically disposed within an outer string of casing;
a connector for releasably connecting the inner string to the outer string;
a first drilling member connected to the inner string; and a circumferential drilling member connected to the outer string, wherein the drilling members are separable when the inner string is released from the outer string.
23. The drilling system of claim 22, further comprising a third string of casing concentrically disposed adjacent to at least one of the inner string or outer string of casings.
24. The drilling system of claim 23, wherein the third string of casing comprises a second circumferential drilling member.
25. The drilling system of claim 23, further comprising a second releasable connector for connecting the third string of casing to the drilling assembly.
26. The drilling system of claim 25, wherein a force required to release the connectors increases as the diameter of the strings of casing decreases.
27. The drilling system of claim 25, wherein the connectors comprise an assembly removable from the wellbore.
28. The drilling system of claim 23, wherein the connectors comprise an assembly that can be deactivated from the surface of the wellbore by establishing sufficient pressure within the casing strings.
29. The drilling system of claim 22, wherein at least one of the drilling members comprise perforations for fluid flow therethrough.
30. The drilling system of claim 22, further comprising a hanger disposed on the upper end of the outer string of casing, wherein the hanger supports the weight of the drilling system from a surface of the wellbore.
31. The drilling system of claim 22, further comprising a conveying member releasably connected to an inner diameter of the inner string of casing.
32. The drilling system of claim 22, wherein the connector comprises a weight sheared pin or locking mechanism.
33. The drilling system of claim 22, further comprising a sealing member disposed between the inner string of casing and the outer string of casing.
34. The drilling system of claim 22, further comprising a wiper disposed between the inner string and outer string of casing.
35. The drilling system of claim 22, further comprising a torque key system, wherein the torque key system prevents rotational translation of the two strings of casing relative to one another.
36. The drilling system of claim 22, further comprising a spline assembly, wherein the spline assembly prevents rotational translation of the two strings of casing relative to one another.
Priority Applications (1)
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CA2585476A CA2585476C (en) | 2002-12-30 | 2003-12-22 | Drilling with concentric strings of casing |
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US10/331,964 US6857487B2 (en) | 2002-12-30 | 2002-12-30 | Drilling with concentric strings of casing |
US10/331,964 | 2002-12-30 |
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CA2585476A Division CA2585476C (en) | 2002-12-30 | 2003-12-22 | Drilling with concentric strings of casing |
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Families Citing this family (91)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7013997B2 (en) * | 1994-10-14 | 2006-03-21 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7108084B2 (en) * | 1994-10-14 | 2006-09-19 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7228901B2 (en) * | 1994-10-14 | 2007-06-12 | Weatherford/Lamb, Inc. | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US6868906B1 (en) * | 1994-10-14 | 2005-03-22 | Weatherford/Lamb, Inc. | Closed-loop conveyance systems for well servicing |
US7100710B2 (en) * | 1994-10-14 | 2006-09-05 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7040420B2 (en) * | 1994-10-14 | 2006-05-09 | Weatherford/Lamb, Inc. | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
US7509722B2 (en) * | 1997-09-02 | 2009-03-31 | Weatherford/Lamb, Inc. | Positioning and spinning device |
US6742596B2 (en) * | 2001-05-17 | 2004-06-01 | Weatherford/Lamb, Inc. | Apparatus and methods for tubular makeup interlock |
US7140445B2 (en) * | 1997-09-02 | 2006-11-28 | Weatherford/Lamb, Inc. | Method and apparatus for drilling with casing |
US6536520B1 (en) * | 2000-04-17 | 2003-03-25 | Weatherford/Lamb, Inc. | Top drive casing system |
GB9815809D0 (en) * | 1998-07-22 | 1998-09-16 | Appleton Robert P | Casing running tool |
GB2340857A (en) * | 1998-08-24 | 2000-03-01 | Weatherford Lamb | An apparatus for facilitating the connection of tubulars and alignment with a top drive |
DE69926802D1 (en) * | 1998-12-22 | 2005-09-22 | Weatherford Lamb | METHOD AND DEVICE FOR PROFILING AND CONNECTING PIPES |
GB2347441B (en) * | 1998-12-24 | 2003-03-05 | Weatherford Lamb | Apparatus and method for facilitating the connection of tubulars using a top drive |
US6896075B2 (en) * | 2002-10-11 | 2005-05-24 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling with casing |
US7311148B2 (en) * | 1999-02-25 | 2007-12-25 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
EP1242711B1 (en) * | 1999-12-22 | 2006-08-16 | Weatherford/Lamb, Inc. | Drilling bit for drilling while running casing |
US20060124306A1 (en) * | 2000-01-19 | 2006-06-15 | Vail William B Iii | Installation of one-way valve after removal of retrievable drill bit to complete oil and gas wells |
US7334650B2 (en) | 2000-04-13 | 2008-02-26 | Weatherford/Lamb, Inc. | Apparatus and methods for drilling a wellbore using casing |
US7306042B2 (en) * | 2002-01-08 | 2007-12-11 | Weatherford/Lamb, Inc. | Method for completing a well using increased fluid temperature |
NO316183B1 (en) * | 2002-03-08 | 2003-12-22 | Sigbjoern Sangesland | Method and apparatus for feeding tubes |
GB0206227D0 (en) * | 2002-03-16 | 2002-05-01 | Weatherford Lamb | Bore-lining and drilling |
US6994176B2 (en) * | 2002-07-29 | 2006-02-07 | Weatherford/Lamb, Inc. | Adjustable rotating guides for spider or elevator |
US6899186B2 (en) * | 2002-12-13 | 2005-05-31 | Weatherford/Lamb, Inc. | Apparatus and method of drilling with casing |
US7730965B2 (en) | 2002-12-13 | 2010-06-08 | Weatherford/Lamb, Inc. | Retractable joint and cementing shoe for use in completing a wellbore |
US7303022B2 (en) * | 2002-10-11 | 2007-12-04 | Weatherford/Lamb, Inc. | Wired casing |
USRE42877E1 (en) | 2003-02-07 | 2011-11-01 | Weatherford/Lamb, Inc. | Methods and apparatus for wellbore construction and completion |
CA2677247C (en) * | 2003-03-05 | 2012-09-25 | Weatherford/Lamb, Inc. | Casing running and drilling system |
CA2517978C (en) * | 2003-03-05 | 2009-07-14 | Weatherford/Lamb, Inc. | Drilling with casing latch |
US7503397B2 (en) * | 2004-07-30 | 2009-03-17 | Weatherford/Lamb, Inc. | Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
WO2004079150A2 (en) * | 2003-03-05 | 2004-09-16 | Weatherford/Lamb, Inc. | Full bore lined wellbores |
GB2414759B (en) * | 2003-04-04 | 2007-11-07 | Weatherford Lamb | Method and apparatus for handling wellbore tubulars |
US7650944B1 (en) | 2003-07-11 | 2010-01-26 | Weatherford/Lamb, Inc. | Vessel for well intervention |
US7264067B2 (en) * | 2003-10-03 | 2007-09-04 | Weatherford/Lamb, Inc. | Method of drilling and completing multiple wellbores inside a single caisson |
US7757784B2 (en) * | 2003-11-17 | 2010-07-20 | Baker Hughes Incorporated | Drilling methods utilizing independently deployable multiple tubular strings |
US7395882B2 (en) | 2004-02-19 | 2008-07-08 | Baker Hughes Incorporated | Casing and liner drilling bits |
US20050126826A1 (en) * | 2003-12-12 | 2005-06-16 | Moriarty Keith A. | Directional casing and liner drilling with mud motor |
CA2496199C (en) * | 2004-02-17 | 2013-10-01 | Tesco Corporation | Retrievable center bit |
US7954570B2 (en) * | 2004-02-19 | 2011-06-07 | Baker Hughes Incorporated | Cutting elements configured for casing component drillout and earth boring drill bits including same |
US8146683B2 (en) * | 2004-02-19 | 2012-04-03 | Baker Hughes Incorporated | Drilling out casing bits with other casing bits |
US7624818B2 (en) | 2004-02-19 | 2009-12-01 | Baker Hughes Incorporated | Earth boring drill bits with casing component drill out capability and methods of use |
NO320467B1 (en) * | 2004-04-13 | 2005-12-12 | Harald Strand | Telescopic conductor for a well installation and method for driving the same underground. |
US7284617B2 (en) * | 2004-05-20 | 2007-10-23 | Weatherford/Lamb, Inc. | Casing running head |
BRPI0512626B1 (en) * | 2004-06-24 | 2015-12-08 | Baker Hughes Inc | drilling systems and methods using multiple independently employable tubular columns |
GB2424432B (en) * | 2005-02-28 | 2010-03-17 | Weatherford Lamb | Deep water drilling with casing |
US20070044957A1 (en) * | 2005-05-27 | 2007-03-01 | Oil Sands Underground Mining, Inc. | Method for underground recovery of hydrocarbons |
US8287050B2 (en) * | 2005-07-18 | 2012-10-16 | Osum Oil Sands Corp. | Method of increasing reservoir permeability |
US7647990B2 (en) * | 2005-10-05 | 2010-01-19 | Tesco Corporation | Method for drilling with a wellbore liner |
CA2649850A1 (en) * | 2006-04-21 | 2007-11-01 | Osum Oil Sands Corp. | Method of drilling from a shaft for underground recovery of hydrocarbons |
WO2007134255A2 (en) * | 2006-05-12 | 2007-11-22 | Weatherford/Lamb, Inc. | Stage cementing methods used in casing while drilling |
US7621351B2 (en) | 2006-05-15 | 2009-11-24 | Baker Hughes Incorporated | Reaming tool suitable for running on casing or liner |
US8276689B2 (en) * | 2006-05-22 | 2012-10-02 | Weatherford/Lamb, Inc. | Methods and apparatus for drilling with casing |
US20080078552A1 (en) * | 2006-09-29 | 2008-04-03 | Osum Oil Sands Corp. | Method of heating hydrocarbons |
US7644769B2 (en) * | 2006-10-16 | 2010-01-12 | Osum Oil Sands Corp. | Method of collecting hydrocarbons using a barrier tunnel |
CA2668774A1 (en) | 2006-11-22 | 2008-05-29 | Osum Oil Sands Corp. | Recovery of bitumen by hydraulic excavation |
US7975771B2 (en) * | 2006-12-06 | 2011-07-12 | Vetco Gray Inc. | Method for running casing while drilling system |
US20090084707A1 (en) * | 2007-09-28 | 2009-04-02 | Osum Oil Sands Corp. | Method of upgrading bitumen and heavy oil |
US7954571B2 (en) | 2007-10-02 | 2011-06-07 | Baker Hughes Incorporated | Cutting structures for casing component drillout and earth-boring drill bits including same |
US8245797B2 (en) | 2007-10-02 | 2012-08-21 | Baker Hughes Incorporated | Cutting structures for casing component drillout and earth-boring drill bits including same |
US7926590B2 (en) * | 2007-10-03 | 2011-04-19 | Tesco Corporation | Method of liner drilling and cementing utilizing a concentric inner string |
US7784552B2 (en) * | 2007-10-03 | 2010-08-31 | Tesco Corporation | Liner drilling method |
US7926578B2 (en) * | 2007-10-03 | 2011-04-19 | Tesco Corporation | Liner drilling system and method of liner drilling with retrievable bottom hole assembly |
US8167960B2 (en) * | 2007-10-22 | 2012-05-01 | Osum Oil Sands Corp. | Method of removing carbon dioxide emissions from in-situ recovery of bitumen and heavy oil |
CA2701164A1 (en) * | 2007-12-03 | 2009-06-11 | Osum Oil Sands Corp. | Method of recovering bitumen from a tunnel or shaft with heating elements and recovery wells |
US8176982B2 (en) * | 2008-02-06 | 2012-05-15 | Osum Oil Sands Corp. | Method of controlling a recovery and upgrading operation in a reservoir |
CA2718885C (en) | 2008-05-20 | 2014-05-06 | Osum Oil Sands Corp. | Method of managing carbon reduction for hydrocarbon producers |
EP2366055B1 (en) * | 2008-11-17 | 2017-08-23 | Weatherford Technology Holdings, LLC | Subsea drilling with casing |
US20100193250A1 (en) * | 2009-01-30 | 2010-08-05 | Tesco Corporation | Cutting Structure for Casing Drilling Underreamer |
WO2010127454A1 (en) | 2009-05-08 | 2010-11-11 | Tesco Corporation | Pump in reverse outliner drilling system |
US8281878B2 (en) | 2009-09-04 | 2012-10-09 | Tesco Corporation | Method of drilling and running casing in large diameter wellbore |
US8186457B2 (en) | 2009-09-17 | 2012-05-29 | Tesco Corporation | Offshore casing drilling method |
US20120199399A1 (en) * | 2009-10-12 | 2012-08-09 | John Andrew Henley | Casing rotary steerable system for drilling |
GB2491999B (en) * | 2010-02-23 | 2016-05-11 | Schlumberger Holdings | Apparatus and method for cementing liner |
US20110214919A1 (en) * | 2010-03-05 | 2011-09-08 | Mcclung Iii Guy L | Dual top drive systems and methods |
US8985227B2 (en) | 2011-01-10 | 2015-03-24 | Schlumberger Technology Corporation | Dampered drop plug |
US8678083B2 (en) * | 2011-04-18 | 2014-03-25 | Baker Hughes Incorporated | Expandable liner hanger with helically shaped slips |
US9010410B2 (en) | 2011-11-08 | 2015-04-21 | Max Jerald Story | Top drive systems and methods |
WO2013126822A2 (en) | 2012-02-22 | 2013-08-29 | Weatherford/Lamb, Inc. | Subsea casing drilling system |
US8739902B2 (en) | 2012-08-07 | 2014-06-03 | Dura Drilling, Inc. | High-speed triple string drilling system |
US9500045B2 (en) | 2012-10-31 | 2016-11-22 | Canrig Drilling Technology Ltd. | Reciprocating and rotating section and methods in a drilling system |
CN103114812B (en) * | 2013-03-05 | 2014-06-18 | 山东托普森金刚石钻头有限公司 | Diamond compact annular concentric simultaneous casing drilling bit and working method thereof |
US9631446B2 (en) | 2013-06-26 | 2017-04-25 | Impact Selector International, Llc | Impact sensing during jarring operations |
US10246954B2 (en) * | 2015-01-13 | 2019-04-02 | Saudi Arabian Oil Company | Drilling apparatus and methods for reducing circulation loss |
US9951602B2 (en) | 2015-03-05 | 2018-04-24 | Impact Selector International, Llc | Impact sensing during jarring operations |
US10711527B2 (en) * | 2015-07-27 | 2020-07-14 | Halliburton Energy Services, Inc. | Drill bit and method for casing while drilling |
US10392864B2 (en) | 2016-01-21 | 2019-08-27 | Baker Hughes, A Ge Company, Llc | Additive manufacturing controlled failure structure and method of making same |
BE1023843B1 (en) * | 2016-06-22 | 2017-08-09 | GeoSea N.V. | DEVICE AND METHOD FOR DRILLING A SHAFT IN A SUBSTRATE |
US10767432B1 (en) | 2016-12-07 | 2020-09-08 | Tressie L. Hewitt | Drill alignment device |
USD837272S1 (en) | 2016-12-07 | 2019-01-01 | Tressie L. Hewitt | Holder for a drill alignment device |
US10927629B2 (en) * | 2016-12-27 | 2021-02-23 | Halliburton Energy Services, Inc. | Downhole machining tool |
US10260295B2 (en) | 2017-05-26 | 2019-04-16 | Saudi Arabian Oil Company | Mitigating drilling circulation loss |
Family Cites Families (215)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3006415A (en) | 1961-10-31 | Cementing apparatus | ||
US3124023A (en) | 1964-03-10 | Dies for pipe and tubing tongs | ||
US122514A (en) * | 1872-01-09 | Improvement in rock-drills | ||
US3123160A (en) | 1964-03-03 | Retrievable subsurface well bore apparatus | ||
US1077772A (en) * | 1913-01-25 | 1913-11-04 | Fred Richard Weathersby | Drill. |
US1185582A (en) | 1914-07-13 | 1916-05-30 | Edward Bignell | Pile. |
US1301285A (en) | 1916-09-01 | 1919-04-22 | Frank W A Finley | Expansible well-casing. |
US1342424A (en) * | 1918-09-06 | 1920-06-08 | Shepard M Cotten | Method and apparatus for constructing concrete piles |
US1471526A (en) * | 1920-07-19 | 1923-10-23 | Rowland O Pickin | Rotary orill bit |
US1418766A (en) | 1920-08-02 | 1922-06-06 | Guiberson Corp | Well-casing spear |
US1585069A (en) | 1924-12-18 | 1926-05-18 | William E Youle | Casing spear |
US1728136A (en) | 1926-10-21 | 1929-09-10 | Lewis E Stephens | Casing spear |
US1830625A (en) * | 1927-02-16 | 1931-11-03 | George W Schrock | Drill for oil and gas wells |
US1777592A (en) | 1929-07-08 | 1930-10-07 | Thomas Idris | Casing spear |
US1998833A (en) | 1930-03-17 | 1935-04-23 | Baker Oil Tools Inc | Cementing guide |
US1825026A (en) | 1930-07-07 | 1931-09-29 | Thomas Idris | Casing spear |
US1842638A (en) | 1930-09-29 | 1932-01-26 | Wilson B Wigle | Elevating apparatus |
US1880218A (en) | 1930-10-01 | 1932-10-04 | Richard P Simmons | Method of lining oil wells and means therefor |
US1917135A (en) | 1932-02-17 | 1933-07-04 | Littell James | Well apparatus |
US2105885A (en) | 1932-03-30 | 1938-01-18 | Frank J Hinderliter | Hollow trip casing spear |
US2049450A (en) | 1933-08-23 | 1936-08-04 | Macclatchie Mfg Company | Expansible cutter tool |
US2017451A (en) | 1933-11-21 | 1935-10-15 | Baash Ross Tool Co | Packing casing bowl |
US1981525A (en) | 1933-12-05 | 1934-11-20 | Bailey E Price | Method of and apparatus for drilling oil wells |
US2060352A (en) | 1936-06-20 | 1936-11-10 | Reed Roller Bit Co | Expansible bit |
US2102555A (en) | 1936-07-02 | 1937-12-14 | Continental Oil Co | Method of drilling wells |
US2167338A (en) | 1937-07-26 | 1939-07-25 | U C Murcell Inc | Welding and setting well casing |
US2203747A (en) * | 1937-09-20 | 1940-06-11 | Harvey D Sandstone | Laminated disk drill bit |
US2216895A (en) | 1939-04-06 | 1940-10-08 | Reed Roller Bit Co | Rotary underreamer |
US2228503A (en) | 1939-04-25 | 1941-01-14 | Boyd | Liner hanger |
US2214429A (en) | 1939-10-24 | 1940-09-10 | William J Miller | Mud box |
US2324679A (en) | 1940-04-26 | 1943-07-20 | Cox Nellie Louise | Rock boring and like tool |
US2305062A (en) | 1940-05-09 | 1942-12-15 | C M P Fishing Tool Corp | Cementing plug |
US2295803A (en) | 1940-07-29 | 1942-09-15 | Charles M O'leary | Cement shoe |
US2370832A (en) | 1941-08-19 | 1945-03-06 | Baker Oil Tools Inc | Removable well packer |
US2379800A (en) | 1941-09-11 | 1945-07-03 | Texas Co | Signal transmission system |
US2414719A (en) | 1942-04-25 | 1947-01-21 | Stanolind Oil & Gas Co | Transmission system |
US2522444A (en) | 1946-07-20 | 1950-09-12 | Donovan B Grable | Well fluid control |
US2641444A (en) | 1946-09-03 | 1953-06-09 | Signal Oil & Gas Co | Method and apparatus for drilling boreholes |
US2499630A (en) | 1946-12-05 | 1950-03-07 | Paul B Clark | Casing expander |
US2668689A (en) | 1947-11-07 | 1954-02-09 | C & C Tool Corp | Automatic power tongs |
US2621742A (en) | 1948-08-26 | 1952-12-16 | Cicero C Brown | Apparatus for cementing well liners |
US2536458A (en) | 1948-11-29 | 1951-01-02 | Theodor R Munsinger | Pipe rotating device for oil wells |
US2720267A (en) | 1949-12-12 | 1955-10-11 | Cicero C Brown | Sealing assemblies for well packers |
US2610690A (en) | 1950-08-10 | 1952-09-16 | Guy M Beatty | Mud box |
US2627891A (en) | 1950-11-28 | 1953-02-10 | Paul B Clark | Well pipe expander |
US2743495A (en) | 1951-05-07 | 1956-05-01 | Nat Supply Co | Method of making a composite cutter |
US2805043A (en) | 1952-02-09 | 1957-09-03 | Jr Edward B Williams | Jetting device for rotary drilling apparatus |
US2765146A (en) | 1952-02-09 | 1956-10-02 | Jr Edward B Williams | Jetting device for rotary drilling apparatus |
US2650314A (en) | 1952-02-12 | 1953-08-25 | George W Hennigh | Special purpose electric motor |
US2764329A (en) | 1952-03-10 | 1956-09-25 | Lucian W Hampton | Load carrying attachment for bicycles, motorcycles, and the like |
US2663073A (en) | 1952-03-19 | 1953-12-22 | Acrometal Products Inc | Method of forming spools |
US2743087A (en) | 1952-10-13 | 1956-04-24 | Layne | Under-reaming tool |
US2738011A (en) | 1953-02-17 | 1956-03-13 | Thomas S Mabry | Means for cementing well liners |
US2741907A (en) | 1953-04-27 | 1956-04-17 | Genender Louis | Locksmithing tool |
US2692059A (en) | 1953-07-15 | 1954-10-19 | Standard Oil Dev Co | Device for positioning pipe in a drilling derrick |
US2723836A (en) * | 1954-09-24 | 1955-11-15 | Bit Guides Inc | Core bit protector |
US2978047A (en) | 1957-12-03 | 1961-04-04 | Vaan Walter H De | Collapsible drill bit assembly and method of drilling |
US3054100A (en) | 1958-06-04 | 1962-09-11 | Gen Precision Inc | Signalling system |
US3159219A (en) | 1958-05-13 | 1964-12-01 | Byron Jackson Inc | Cementing plugs and float equipment |
US3087546A (en) | 1958-08-11 | 1963-04-30 | Brown J Woolley | Methods and apparatus for removing defective casing or pipe from well bores |
US2953406A (en) | 1958-11-24 | 1960-09-20 | A D Timmons | Casing spear |
US3041901A (en) | 1959-05-20 | 1962-07-03 | Dowty Rotol Ltd | Make-up and break-out mechanism for drill pipe joints |
US3090031A (en) | 1959-09-29 | 1963-05-14 | Texaco Inc | Signal transmission system |
US3117636A (en) | 1960-06-08 | 1964-01-14 | John L Wilcox | Casing bit with a removable center |
US3111179A (en) | 1960-07-26 | 1963-11-19 | A And B Metal Mfg Company Inc | Jet nozzle |
US3102599A (en) | 1961-09-18 | 1963-09-03 | Continental Oil Co | Subterranean drilling process |
US3191680A (en) | 1962-03-14 | 1965-06-29 | Pan American Petroleum Corp | Method of setting metallic liners in wells |
US3131769A (en) | 1962-04-09 | 1964-05-05 | Baker Oil Tools Inc | Hydraulic anchors for tubular strings |
US3122811A (en) | 1962-06-29 | 1964-03-03 | Lafayette E Gilreath | Hydraulic slip setting apparatus |
US3169592A (en) | 1962-10-22 | 1965-02-16 | Lamphere Jean K | Retrievable drill bit |
US3193116A (en) | 1962-11-23 | 1965-07-06 | Exxon Production Research Co | System for removing from or placing pipe in a well bore |
US3191677A (en) | 1963-04-29 | 1965-06-29 | Myron M Kinley | Method and apparatus for setting liners in tubing |
NL6411125A (en) | 1963-09-25 | 1965-03-26 | ||
US3353599A (en) | 1964-08-04 | 1967-11-21 | Gulf Oil Corp | Method and apparatus for stabilizing formations |
DE1216822B (en) | 1965-03-27 | 1966-05-18 | Beteiligungs & Patentverw Gmbh | Tunneling machine |
US3380528A (en) | 1965-09-24 | 1968-04-30 | Tri State Oil Tools Inc | Method and apparatus of removing well pipe from a well bore |
US3419079A (en) | 1965-10-23 | 1968-12-31 | Schlumberger Technology Corp | Well tool with expansible anchor |
US3392609A (en) | 1966-06-24 | 1968-07-16 | Abegg & Reinhold Co | Well pipe spinning unit |
US3477527A (en) | 1967-06-05 | 1969-11-11 | Global Marine Inc | Kelly and drill pipe spinner-stabber |
US3635105A (en) | 1967-10-17 | 1972-01-18 | Byron Jackson Inc | Power tong head and assembly |
US3518903A (en) | 1967-12-26 | 1970-07-07 | Byron Jackson Inc | Combined power tong and backup tong assembly |
US3489220A (en) | 1968-08-02 | 1970-01-13 | J C Kinley | Method and apparatus for repairing pipe in wells |
US3548936A (en) | 1968-11-15 | 1970-12-22 | Dresser Ind | Well tools and gripping members therefor |
US3552507A (en) | 1968-11-25 | 1971-01-05 | Cicero C Brown | System for rotary drilling of wells using casing as the drill string |
US3747675A (en) | 1968-11-25 | 1973-07-24 | C Brown | Rotary drive connection for casing drilling string |
FR1604950A (en) * | 1968-12-31 | 1971-05-15 | ||
US3575245A (en) | 1969-02-05 | 1971-04-20 | Servco Co | Apparatus for expanding holes |
US3552508A (en) | 1969-03-03 | 1971-01-05 | Cicero C Brown | Apparatus for rotary drilling of wells using casing as the drill pipe |
US3606664A (en) | 1969-04-04 | 1971-09-21 | Exxon Production Research Co | Leak-proof threaded connections |
US3570598A (en) | 1969-05-05 | 1971-03-16 | Glenn D Johnson | Constant strain jar |
US3550684A (en) | 1969-06-03 | 1970-12-29 | Schlumberger Technology Corp | Methods and apparatus for facilitating the descent of well tools through deviated well bores |
US3566505A (en) | 1969-06-09 | 1971-03-02 | Hydrotech Services | Apparatus for aligning two sections of pipe |
US3559739A (en) | 1969-06-20 | 1971-02-02 | Chevron Res | Method and apparatus for providing continuous foam circulation in wells |
US3552509A (en) | 1969-09-11 | 1971-01-05 | Cicero C Brown | Apparatus for rotary drilling of wells using casing as drill pipe |
US3603413A (en) | 1969-10-03 | 1971-09-07 | Christensen Diamond Prod Co | Retractable drill bits |
US3552510A (en) | 1969-10-08 | 1971-01-05 | Cicero C Brown | Apparatus for rotary drilling of wells using casing as the drill pipe |
US3624760A (en) * | 1969-11-03 | 1971-11-30 | Albert G Bodine | Sonic apparatus for installing a pile jacket, casing member or the like in an earthen formation |
US3602302A (en) | 1969-11-10 | 1971-08-31 | Westinghouse Electric Corp | Oil production system |
BE757087A (en) | 1969-12-03 | 1971-04-06 | Gardner Denver Co | REMOTELY CONTROLLED DRILL ROD UNSCREWING MECHANISM |
US3691624A (en) | 1970-01-16 | 1972-09-19 | John C Kinley | Method of expanding a liner |
US3603411A (en) | 1970-01-19 | 1971-09-07 | Christensen Diamond Prod Co | Retractable drill bits |
US3603412A (en) | 1970-02-02 | 1971-09-07 | Baker Oil Tools Inc | Method and apparatus for drilling in casing from the top of a borehole |
US3662842A (en) | 1970-04-14 | 1972-05-16 | Automatic Drilling Mach | Automatic coupling system |
US3696332A (en) | 1970-05-25 | 1972-10-03 | Shell Oil Co | Telemetering drill string with self-cleaning connectors |
US3808916A (en) | 1970-09-24 | 1974-05-07 | Robbins & Ass J | Earth drilling machine |
US3656564A (en) | 1970-12-03 | 1972-04-18 | Cicero C Brown | Apparatus for rotary drilling of wells using casing as the drill pipe |
US3669190A (en) | 1970-12-21 | 1972-06-13 | Otis Eng Corp | Methods of completing a well |
US3692126A (en) | 1971-01-29 | 1972-09-19 | Frank C Rushing | Retractable drill bit apparatus |
US3785193A (en) | 1971-04-10 | 1974-01-15 | Kinley J | Liner expanding apparatus |
US3838613A (en) | 1971-04-16 | 1974-10-01 | Byron Jackson Inc | Motion compensation system for power tong apparatus |
US3729057A (en) | 1971-11-30 | 1973-04-24 | Werner Ind Inc | Travelling drill bit |
US3691825A (en) | 1971-12-03 | 1972-09-19 | Norman D Dyer | Rotary torque indicator for well drilling apparatus |
FR2209038B1 (en) * | 1972-12-06 | 1977-07-22 | Petroles Cie Francaise | |
US3881375A (en) | 1972-12-12 | 1975-05-06 | Borg Warner | Pipe tong positioning system |
US4054426A (en) | 1972-12-20 | 1977-10-18 | White Gerald W | Thin film treated drilling bit cones |
US3840128A (en) | 1973-07-09 | 1974-10-08 | N Swoboda | Racking arm for pipe sections, drill collars, riser pipe, and the like used in well drilling operations |
US3870114A (en) | 1973-07-23 | 1975-03-11 | Stabilator Ab | Drilling apparatus especially for ground drilling |
US3934660A (en) | 1974-07-02 | 1976-01-27 | Nelson Daniel E | Flexpower deep well drill |
US3964556A (en) | 1974-07-10 | 1976-06-22 | Gearhart-Owen Industries, Inc. | Downhole signaling system |
US4077525A (en) | 1974-11-14 | 1978-03-07 | Lamb Industries, Inc. | Derrick mounted apparatus for the manipulation of pipe |
US3945444A (en) * | 1975-04-01 | 1976-03-23 | The Anaconda Company | Split bit casing drill |
US3980143A (en) | 1975-09-30 | 1976-09-14 | Driltech, Inc. | Holding wrench for drill strings |
DE2604063A1 (en) | 1976-02-03 | 1977-08-04 | Miguel Kling | SELF-PROPELLING AND SELF-LOCKING DEVICE FOR DRIVING ON CANALS AND FORMED BY LONG DISTANCES |
US4049066A (en) | 1976-04-19 | 1977-09-20 | Richey Vernon T | Apparatus for reducing annular back pressure near the drill bit |
GB1516491A (en) | 1976-05-06 | 1978-07-05 | A Z Int Tool Co | Well drilling method and apparatus therefor |
US4100968A (en) | 1976-08-30 | 1978-07-18 | Charles George Delano | Technique for running casing |
US4257442A (en) | 1976-09-27 | 1981-03-24 | Claycomb Jack R | Choke for controlling the flow of drilling mud |
US4189185A (en) | 1976-09-27 | 1980-02-19 | Tri-State Oil Tool Industries, Inc. | Method for producing chambered blast holes |
US4064939A (en) | 1976-11-01 | 1977-12-27 | Dresser Industries, Inc. | Method and apparatus for running and retrieving logging instruments in highly deviated well bores |
US4082144A (en) | 1976-11-01 | 1978-04-04 | Dresser Industries, Inc. | Method and apparatus for running and retrieving logging instruments in highly deviated well bores |
US4186628A (en) | 1976-11-30 | 1980-02-05 | General Electric Company | Rotary drill bit and method for making same |
US4100981A (en) * | 1977-02-04 | 1978-07-18 | Chaffin John D | Earth boring apparatus for geological drilling and coring |
US4142739A (en) | 1977-04-18 | 1979-03-06 | Compagnie Maritime d'Expertise, S.A. | Pipe connector apparatus having gripping and sealing means |
SE411139B (en) | 1977-04-29 | 1979-12-03 | Sandvik Ab | DRILLING DEVICE |
US4133396A (en) | 1977-11-04 | 1979-01-09 | Smith International, Inc. | Drilling and casing landing apparatus and method |
US4173457A (en) | 1978-03-23 | 1979-11-06 | Alloys, Incorporated | Hardfacing composition of nickel-bonded sintered chromium carbide particles and tools hardfaced thereof |
US4274777A (en) | 1978-08-04 | 1981-06-23 | Scaggs Orville C | Subterranean well pipe guiding apparatus |
US4175619A (en) | 1978-09-11 | 1979-11-27 | Davis Carl A | Well collar or shoe and cementing/drilling process |
US4221269A (en) | 1978-12-08 | 1980-09-09 | Hudson Ray E | Pipe spinner |
US4281722A (en) | 1979-05-15 | 1981-08-04 | Long Year Company | Retractable bit system |
US4274778A (en) | 1979-06-05 | 1981-06-23 | Putnam Paul S | Mechanized stand handling apparatus for drilling rigs |
US4262693A (en) | 1979-07-02 | 1981-04-21 | Bernhardt & Frederick Co., Inc. | Kelly valve |
US4287949A (en) | 1980-01-07 | 1981-09-08 | Mwl Tool And Supply Company | Setting tools and liner hanger assembly |
MX153352A (en) | 1980-03-11 | 1986-10-01 | Carlor Ramirez Jauregui | IMPROVEMENTS IN CONTRACTIL DRILL FOR DRILLING WELLS |
US4320915A (en) | 1980-03-24 | 1982-03-23 | Varco International, Inc. | Internal elevator |
US4336415A (en) | 1980-05-16 | 1982-06-22 | Walling John B | Flexible production tubing |
US4315553A (en) | 1980-08-25 | 1982-02-16 | Stallings Jimmie L | Continuous circulation apparatus for air drilling well bore operations |
US4396076A (en) | 1981-04-27 | 1983-08-02 | Hachiro Inoue | Under-reaming pile bore excavator |
US4396077A (en) | 1981-09-21 | 1983-08-02 | Strata Bit Corporation | Drill bit with carbide coated cutting face |
US4440220A (en) | 1982-06-04 | 1984-04-03 | Mcarthur James R | System for stabbing well casing |
US4413682A (en) | 1982-06-07 | 1983-11-08 | Baker Oil Tools, Inc. | Method and apparatus for installing a cementing float shoe on the bottom of a well casing |
US4652195A (en) * | 1984-01-26 | 1987-03-24 | Mcarthur James R | Casing stabbing and positioning apparatus |
US4651837A (en) * | 1984-05-31 | 1987-03-24 | Mayfield Walter G | Downhole retrievable drill bit |
FR2568935B1 (en) * | 1984-08-08 | 1986-09-05 | Petroles Cie Francaise | DRILL PIPE CONNECTION, PARTICULARLY FOR CROSSING A LOSS OF TRAFFIC AREA |
HU195559B (en) * | 1984-09-04 | 1988-05-30 | Janos Fenyvesi | Drilling rig of continuous operation |
US4580631A (en) * | 1985-02-13 | 1986-04-08 | Joe R. Brown | Liner hanger with lost motion coupling |
US4655286A (en) * | 1985-02-19 | 1987-04-07 | Ctc Corporation | Method for cementing casing or liners in an oil well |
FR2605657A1 (en) * | 1986-10-22 | 1988-04-29 | Soletanche | METHOD FOR PRODUCING A PIEU IN SOIL, DRILLING MACHINE AND DEVICE FOR IMPLEMENTING SAID METHOD |
US4725179A (en) * | 1986-11-03 | 1988-02-16 | Lee C. Moore Corporation | Automated pipe racking apparatus |
US5717334A (en) * | 1986-11-04 | 1998-02-10 | Paramagnetic Logging, Inc. | Methods and apparatus to produce stick-slip motion of logging tool attached to a wireline drawn upward by a continuously rotating wireline drum |
US4813495A (en) * | 1987-05-05 | 1989-03-21 | Conoco Inc. | Method and apparatus for deepwater drilling |
US4836299A (en) * | 1987-10-19 | 1989-06-06 | Bodine Albert G | Sonic method and apparatus for installing monitor wells for the surveillance and control of earth contamination |
IE903114A1 (en) * | 1989-08-31 | 1991-03-13 | Union Oil Co | Well casing flotation device and method |
US5096465A (en) * | 1989-12-13 | 1992-03-17 | Norton Company | Diamond metal composite cutter and method for making same |
US5191939A (en) * | 1990-01-03 | 1993-03-09 | Tam International | Casing circulator and method |
US4997042A (en) * | 1990-01-03 | 1991-03-05 | Jordan Ronald A | Casing circulator and method |
US5082069A (en) * | 1990-03-01 | 1992-01-21 | Atlantic Richfield Company | Combination drivepipe/casing and installation method for offshore well |
US5097870A (en) * | 1990-03-15 | 1992-03-24 | Conoco Inc. | Composite tubular member with multiple cells |
US5152554A (en) * | 1990-12-18 | 1992-10-06 | Lafleur Petroleum Services, Inc. | Coupling apparatus |
FR2679957B1 (en) * | 1991-08-02 | 1998-12-04 | Inst Francais Du Petrole | METHOD AND DEVICE FOR PERFORMING MEASUREMENTS AND / OR INTERVENTIONS IN A WELL BORE OR DURING DRILLING. |
US5197553A (en) * | 1991-08-14 | 1993-03-30 | Atlantic Richfield Company | Drilling with casing and retrievable drill bit |
US5186265A (en) * | 1991-08-22 | 1993-02-16 | Atlantic Richfield Company | Retrievable bit and eccentric reamer assembly |
US5294228A (en) * | 1991-08-28 | 1994-03-15 | W-N Apache Corporation | Automatic sequencing system for earth drilling machine |
US5291956A (en) * | 1992-04-15 | 1994-03-08 | Union Oil Company Of California | Coiled tubing drilling apparatus and method |
US5285204A (en) * | 1992-07-23 | 1994-02-08 | Conoco Inc. | Coil tubing string and downhole generator |
US5297833A (en) * | 1992-11-12 | 1994-03-29 | W-N Apache Corporation | Apparatus for gripping a down hole tubular for support and rotation |
US5379835A (en) * | 1993-04-26 | 1995-01-10 | Halliburton Company | Casing cementing equipment |
US5386746A (en) * | 1993-05-26 | 1995-02-07 | Hawk Industries, Inc. | Apparatus for making and breaking joints in drill pipe strings |
US5887668A (en) * | 1993-09-10 | 1999-03-30 | Weatherford/Lamb, Inc. | Wellbore milling-- drilling |
US5887655A (en) * | 1993-09-10 | 1999-03-30 | Weatherford/Lamb, Inc | Wellbore milling and drilling |
US5402856A (en) * | 1993-12-21 | 1995-04-04 | Amoco Corporation | Anti-whirl underreamer |
US5472057A (en) * | 1994-04-11 | 1995-12-05 | Atlantic Richfield Company | Drilling with casing and retrievable bit-motor assembly |
US5615747A (en) * | 1994-09-07 | 1997-04-01 | Vail, Iii; William B. | Monolithic self sharpening rotary drill bit having tungsten carbide rods cast in steel alloys |
US6857486B2 (en) * | 2001-08-19 | 2005-02-22 | Smart Drilling And Completion, Inc. | High power umbilicals for subterranean electric drilling machines and remotely operated vehicles |
US5497840A (en) * | 1994-11-15 | 1996-03-12 | Bestline Liner Systems | Process for completing a well |
US5732776A (en) * | 1995-02-09 | 1998-03-31 | Baker Hughes Incorporated | Downhole production well control system and method |
GB9503830D0 (en) * | 1995-02-25 | 1995-04-19 | Camco Drilling Group Ltd | "Improvements in or relating to steerable rotary drilling systems" |
AUPN357995A0 (en) * | 1995-06-15 | 1995-07-06 | Rear, Ian Graeme | Down hole hammer assembly |
US5711382A (en) * | 1995-07-26 | 1998-01-27 | Hansen; James | Automated oil rig servicing system |
US5791417A (en) * | 1995-09-22 | 1998-08-11 | Weatherford/Lamb, Inc. | Tubular window formation |
US5921285A (en) * | 1995-09-28 | 1999-07-13 | Fiberspar Spoolable Products, Inc. | Composite spoolable tube |
DE59508569D1 (en) * | 1995-10-09 | 2000-08-17 | Baker Hughes Inc | Method and drill for drilling holes in underground formations |
US6196336B1 (en) * | 1995-10-09 | 2001-03-06 | Baker Hughes Incorporated | Method and apparatus for drilling boreholes in earth formations (drilling liner systems) |
US5720356A (en) * | 1996-02-01 | 1998-02-24 | Gardes; Robert | Method and system for drilling underbalanced radial wells utilizing a dual string technique in a live well |
US6035952A (en) * | 1996-05-03 | 2000-03-14 | Baker Hughes Incorporated | Closed loop fluid-handling system for use during drilling of wellbores |
US5947213A (en) * | 1996-12-02 | 1999-09-07 | Intelligent Inspection Corporation | Downhole tools using artificial intelligence based control |
US5839519A (en) * | 1996-11-08 | 1998-11-24 | Sandvik Ab | Methods and apparatus for attaching a casing to a drill bit in overburden drilling equipment |
FR2757426B1 (en) * | 1996-12-19 | 1999-01-29 | Inst Francais Du Petrole | WATER-BASED FOAMING COMPOSITION - MANUFACTURING METHOD |
US5860474A (en) * | 1997-06-26 | 1999-01-19 | Atlantic Richfield Company | Through-tubing rotary drilling |
US6536520B1 (en) * | 2000-04-17 | 2003-03-25 | Weatherford/Lamb, Inc. | Top drive casing system |
US7509722B2 (en) * | 1997-09-02 | 2009-03-31 | Weatherford/Lamb, Inc. | Positioning and spinning device |
US5921332A (en) * | 1997-12-29 | 1999-07-13 | Sandvik Ab | Apparatus for facilitating removal of a casing of an overburden drilling equipment from a bore |
DK1071863T3 (en) * | 1998-04-14 | 2004-01-26 | Welltec Aps | Connection to drill pipe |
US6142246A (en) * | 1998-05-15 | 2000-11-07 | Petrolphysics Partners Lp | Multiple lateral hydraulic drilling apparatus and method |
GB2364728B (en) * | 1998-05-16 | 2002-12-04 | Duncan Cuthill | Method of and apparatus for installing a pile underwater to create a mooring anchorage |
US6135208A (en) * | 1998-05-28 | 2000-10-24 | Halliburton Energy Services, Inc. | Expandable wellbore junction |
CA2240559C (en) * | 1998-06-12 | 2003-12-23 | Sandvik Ab | Embankment hammer |
US6170573B1 (en) * | 1998-07-15 | 2001-01-09 | Charles G. Brunet | Freely moving oil field assembly for data gathering and or producing an oil well |
GB2340859A (en) * | 1998-08-24 | 2000-03-01 | Weatherford Lamb | Method and apparatus for facilitating the connection of tubulars using a top drive |
US6186233B1 (en) * | 1998-11-30 | 2001-02-13 | Weatherford Lamb, Inc. | Down hole assembly and method for forming a down hole window and at least one keyway in communication with the down hole window for use in multilateral wells |
US6538576B1 (en) * | 1999-04-23 | 2003-03-25 | Halliburton Energy Services, Inc. | Self-contained downhole sensor and method of placing and interrogating same |
US6189621B1 (en) * | 1999-08-16 | 2001-02-20 | Smart Drilling And Completion, Inc. | Smart shuttles to complete oil and gas wells |
US6343649B1 (en) * | 1999-09-07 | 2002-02-05 | Halliburton Energy Services, Inc. | Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
US6419033B1 (en) * | 1999-12-10 | 2002-07-16 | Baker Hughes Incorporated | Apparatus and method for simultaneous drilling and casing wellbores |
US6702040B1 (en) * | 2001-04-26 | 2004-03-09 | Floyd R. Sensenig | Telescopic drilling method |
-
2002
- 2002-12-30 US US10/331,964 patent/US6857487B2/en not_active Expired - Lifetime
-
2003
- 2003-12-22 CA CA002453768A patent/CA2453768C/en not_active Expired - Fee Related
- 2003-12-23 NO NO20035809A patent/NO325166B1/en not_active IP Right Cessation
- 2003-12-23 GB GB0329889A patent/GB2396870B/en not_active Expired - Fee Related
- 2003-12-29 BR BRPI0306091-8A patent/BR0306091B1/en not_active IP Right Cessation
-
2005
- 2005-02-22 US US11/063,459 patent/US7131505B2/en not_active Expired - Fee Related
-
2008
- 2008-01-17 NO NO20080309A patent/NO336084B1/en not_active IP Right Cessation
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US6857487B2 (en) | 2005-02-22 |
BR0306091A (en) | 2004-12-07 |
GB2396870B (en) | 2006-08-23 |
NO336084B1 (en) | 2015-05-04 |
GB0329889D0 (en) | 2004-01-28 |
US20040124010A1 (en) | 2004-07-01 |
NO20080309L (en) | 2004-07-01 |
GB2396870A (en) | 2004-07-07 |
CA2453768A1 (en) | 2004-06-30 |
US20050133274A1 (en) | 2005-06-23 |
BR0306091B1 (en) | 2015-03-10 |
NO20035809L (en) | 2004-07-01 |
NO325166B1 (en) | 2008-02-11 |
US7131505B2 (en) | 2006-11-07 |
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EEER | Examination request | ||
MKLA | Lapsed |
Effective date: 20191223 |