US20040060741A1 - Hole-opener for enlarging pilot hole - Google Patents
Hole-opener for enlarging pilot hole Download PDFInfo
- Publication number
- US20040060741A1 US20040060741A1 US10/255,633 US25563302A US2004060741A1 US 20040060741 A1 US20040060741 A1 US 20040060741A1 US 25563302 A US25563302 A US 25563302A US 2004060741 A1 US2004060741 A1 US 2004060741A1
- Authority
- US
- United States
- Prior art keywords
- sleeve
- drive sub
- sub
- hole
- opener
- 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.)
- Abandoned
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000003381 stabilizer Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- E21B10/00—Drill bits
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
- E21B10/28—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with non-expansible roller cutters
Definitions
- the present invention relates to a hole-opener for enlarging the diameter of an underground pilot hole. More particularly it relates to a hole-opener that can easily be disassembled to replace the rotary cutting elements.
- a relatively small diameter pilot hole is drilled by a rig. This is done using a string of drill pipe having, at the drilling end, a fluid-driven motor rotating a drill bit. Once the pilot hole is formed, the bit is replaced with a tool referred to as a hole-opener The drill string is then rotated and pulled to draw the hole-opener back along the pilot hole to enlarge its diameter. This procedure may be repeated more than once with progressively larger hole-openers, to gradually increase the pilot tube diameter to achieve a borehole of the desired size.
- FIG. 1 A typical prior art hole-opener is shown in FIG. 1. It comprises:
- ‘arms’ or bars are welded or bolted to the exterior surface of the body—they extend longitudinally thereof in parallel, circumferentially spaced apart relationship;
- each arm has at its front end a rotary cutting element, such as a toothed cone mounted on a support pin extending between the arm and the body;
- jet ports are provided, extending through the side wall of the body at the cones, for jetting drilling fluid into the annulus formed between the tool and drill string and the pilot hole wall to clean the cones and remove drill cuttings;
- a threaded plug is provided for closing the through bore at the body's rear end.
- a hole-opener which incorporates a removable sleeve mounted on a tubular body (referred to as a drive sub). Arms and cutting elements are affixed to the sleeve. Means are provided for locking the drive sub and sleeve together so that they rotate as a unit. Means are also provided for locking the sleeve axially in a pre-determined position on the drive sub. And finally, means are provided for transmitting the pulling force of the drill string and attached drive sub to the sleeve and its cutting elements.
- the hole-opener has front and rear ends and comprises:
- a tubular drive sub having a longitudinal bore and threaded connections at each end, more preferably a box at the front end and a pin at the second end;
- a tubular sleeve which slides onto the rear end of the drive sub.
- the sleeve has a plurality of radially protruding arms attached to its front end surface at spaced positions about its circumference.
- a cutting element preferably a toothed cone, is rotatably mounted to the front end of each arm;
- means for engaging the drive sub and sleeve so that they rotate together More preferably such means comprise outwardly protruding, circumferentially spaced apart stabilizer bars affixed to the external surface of the drive sub and extending longitudinally thereof. These stabilizer bars engage corresponding slots formed in the front end of the sleeve.
- the bars and slot walls combine to transfer rotational force from the drive sub to the sleeve.
- the bars also function as a stop, to limit the axial travel of the sleeve along the drive sub and lock the latter's front end at a pre-determined position; and
- a retainer sub which has a threaded connection at its front end for engaging the rear connection of the drive sub.
- the retainer sub also has a radial shoulder which abuts the rear end face of the sleeve and locks the sleeve at its rear in the pre-determined position.
- the retainer sub also functions to transmit the axial pull force from the drill string and drive sub to the sleeve and its cutting elements;
- the drive sub forming ports extending through its side wall which, when the tool has been assembled, are positioned adjacent the cutting elements and serve to jet drilling fluid so as to clean the cones and remove cuttings through the annulus.
- the invention is concerned with a hole-opener for enlarging the diameter of a pilot hole, the hole-opener having front and rear ends and comprising: a tubular drive sub having an external surface, a longitudinal bore and threaded connections at its front and rear ends; a tubular sleeve for sliding axially over the rear end of the drive sub; means for locking the sleeve and drive sub together for rotation as a unit; means, carried by the drive sub, for engaging the front end of the sleeve to stop its axial movement along the drive sub at a pre-determined position; a retainer sub for threadably engaging the rear end connection of the drive sub and bearing against the rear end of the sleeve to lock the sleeve in the pre-determined position; the sleeve carrying at least one rotary cutting element assembly at its front end; the drive sub forming ports for jetting drilling fluid contiguous to the cutting elements when the sleeve is locked in the pre-determined position.
- FIG. 1 is a perspective sectional side view of a hole-opener in accordance with the prior art
- FIG. 2 is a partly sectional side view of an assembled hole-opener in accordance with the present invention.
- FIG. 3 is a sectional side view of the drive sub
- FIG. 4 is a sectional side view of the retainer sub
- FIG. 5 is a sectional side view of the sleeve showing a slot, the arms and rotary cones.
- the tool or hole-opener 1 comprises a drive sub 2 , a sleeve 3 and a retainer sub 4 .
- Subs are used because they are heavy steel tubulars equipped with threaded pins and boxes adapted to connect with the connections of drill pipe commonly used in this service.
- the subs are adapted to be ‘made up’ and ‘broken’ by the rig equipment.
- the subs have been modified in certain respects, as described below, to prepare them for use in this tool.
- the drive sub 2 has a box connection 5 at its front end 6 and a pin connection 7 at its rear end 8 .
- Stabilizer bars 9 are welded to the drive sub's external surface 10 . These stabilizer bars 9 extend longitudinally of the drive sub 2 at spaced positions around its circumference. The stabilizer bars 9 are designed to centralize the tool in the pilot hole (not shown). They also function to act as stops limiting axial advance of the sleeve 3 along the drive sub 2 and as part of the rotary drive connection between the drive sub 2 and sleeve 3 .
- the drive sub side wall 11 also forms ports 12 , between the stabilizer bars 9 , for jetting drilling fluid into the annulus formed between the tool and the borehole wall.
- the sleeve 3 is formed with slots 13 in its forward end 14 , for receiving the stabilizer bars 9 .
- the side walls 15 of the slots 13 and the bars 9 combine to lock the sleeve 3 and drive sub 2 together for rotation as a unit.
- the sleeve 3 also carries a plurality of outwardly protruding arms 16 affixed to the front end of the sleeve's outer surface 17 .
- the arms 16 extend longitudinally of the sleeve 3 in spaced apart arrangement.
- Each arm 16 carries a rotatably mounted, toothed cone 18 at its front end 19 .
- the cones 18 are positioned adjacent the jet ports 12 .
- the retainer sub 4 has a box connection 20 at its front end, sized to be slidably received in the rear end of the bore 21 of the sleeve 3 .
- the box connection 20 is connected with the pin connection 7 of the drive sub 2 .
- the retainer sub 4 also has a radial shoulder 22 which abuts the rear end face 23 of the sleeve 2 when the tool is assembled.
- the retainer sub 4 being threadably engaged with the drive sub 2 , therefore functions to transmit axial pull from the drill string 24 to the sleeve 3 and its rotary cones 18 .
- the retainer sub shoulder 22 combines with the stabilizer bars 9 to lock the sleeve 3 in a pre-determined position with the cones 18 positioned opposite the jet ports 12 .
- a plug sub 25 is threaded onto the rear pin connection 26 of the retainer sub 4 , to close off its bore 27 .
- the resultant tool can be disassembled by backing off and removing the retainer sub 4 and removing and replacing the sleeve 3 . This is done when the cones 18 are worn or are to be replaced to cut a larger diameter borehole.
- variants of the described tool can be implemented by those skilled in the art without changing the substance of the tool.
- splines can be used to lock the drive sub and sleeve for rotation together.
- the tubular retainer sub can be replaced with a plug—the term ‘retainer sub’ is intended to be interpreted to include a plug.
Abstract
The hole-opener is designed so that it can be disassembled in the field to replace worn cones or to enlarge the effective diameter of the tool. It comprises: a tubular drive sub, which connects at its front end with a rotating drill string which is being pulled along a pilot hole; a sleeve which slides over the rear portion of the drive sub; and a retainer sub which is connected with the rear end of the drive sub. The drive sub has external protruding bars which engage slots formed in the forward end of the sleeve, for limiting forward movement of the sleeve and locking the drive sub and sleeve together so that they rotate as a unit. The retainer sub has a radial shoulder which abuts the rear end of the sleeve to lock it in place. The retainer sub also transmits axial pull from the drive sub to the sleeve. The sleeve carries rotary cutting elements which are pulled and rotated to cut formation and enlarge the pilot hole.
Description
- The present invention relates to a hole-opener for enlarging the diameter of an underground pilot hole. More particularly it relates to a hole-opener that can easily be disassembled to replace the rotary cutting elements.
- In connection with laying cables or installing a flowline it is periodically necessary to bore a generally horizontal, underground borehole extending between one surface location and another. This might be done, for example, to provide a borehole at a crossing beneath a river.
- In such an operation, a relatively small diameter pilot hole is drilled by a rig. This is done using a string of drill pipe having, at the drilling end, a fluid-driven motor rotating a drill bit. Once the pilot hole is formed, the bit is replaced with a tool referred to as a hole-opener The drill string is then rotated and pulled to draw the hole-opener back along the pilot hole to enlarge its diameter. This procedure may be repeated more than once with progressively larger hole-openers, to gradually increase the pilot tube diameter to achieve a borehole of the desired size.
- A typical prior art hole-opener is shown in FIG. 1. It comprises:
- a one-piece tubular body forming a through bore and having threaded connections at the front and rear ends of the tool;
- ‘arms’ or bars are welded or bolted to the exterior surface of the body—they extend longitudinally thereof in parallel, circumferentially spaced apart relationship;
- each arm has at its front end a rotary cutting element, such as a toothed cone mounted on a support pin extending between the arm and the body;
- jet ports are provided, extending through the side wall of the body at the cones, for jetting drilling fluid into the annulus formed between the tool and drill string and the pilot hole wall to clean the cones and remove drill cuttings; and
- a threaded plug is provided for closing the through bore at the body's rear end.
- There are shortcomings associated with these commonly used tools. These shortcomings appear to have simply been tolerated for many years without a useful remedy, as far as I am aware.
- More particularly, the cones wear out in use and need to be removed and replaced. However, it is not practical to make this change-out in the field with the prior art solid tools.
- In addition, it is therefore necessary to maintain at the site an inventory of complete tools having progressively larger diameters, if the pilot hole is to be enlarged in stages.
- It is the objective of the present invention to provide a tool or hole-opener which is improved with respect to these shortcomings.
- In accordance with the invention, a hole-opener is provided which incorporates a removable sleeve mounted on a tubular body (referred to as a drive sub). Arms and cutting elements are affixed to the sleeve. Means are provided for locking the drive sub and sleeve together so that they rotate as a unit. Means are also provided for locking the sleeve axially in a pre-determined position on the drive sub. And finally, means are provided for transmitting the pulling force of the drill string and attached drive sub to the sleeve and its cutting elements.
- In one preferred embodiment, the hole-opener has front and rear ends and comprises:
- a tubular drive sub having a longitudinal bore and threaded connections at each end, more preferably a box at the front end and a pin at the second end;
- a tubular sleeve which slides onto the rear end of the drive sub. The sleeve has a plurality of radially protruding arms attached to its front end surface at spaced positions about its circumference. A cutting element, preferably a toothed cone, is rotatably mounted to the front end of each arm;
- means for engaging the drive sub and sleeve so that they rotate together. More preferably such means comprise outwardly protruding, circumferentially spaced apart stabilizer bars affixed to the external surface of the drive sub and extending longitudinally thereof. These stabilizer bars engage corresponding slots formed in the front end of the sleeve. The bars and slot walls combine to transfer rotational force from the drive sub to the sleeve. The bars also function as a stop, to limit the axial travel of the sleeve along the drive sub and lock the latter's front end at a pre-determined position; and
- a retainer sub, which has a threaded connection at its front end for engaging the rear connection of the drive sub. The retainer sub also has a radial shoulder which abuts the rear end face of the sleeve and locks the sleeve at its rear in the pre-determined position. The retainer sub also functions to transmit the axial pull force from the drill string and drive sub to the sleeve and its cutting elements;
- the drive sub forming ports extending through its side wall which, when the tool has been assembled, are positioned adjacent the cutting elements and serve to jet drilling fluid so as to clean the cones and remove cuttings through the annulus.
- Broadly stated, the invention is concerned with a hole-opener for enlarging the diameter of a pilot hole, the hole-opener having front and rear ends and comprising: a tubular drive sub having an external surface, a longitudinal bore and threaded connections at its front and rear ends; a tubular sleeve for sliding axially over the rear end of the drive sub; means for locking the sleeve and drive sub together for rotation as a unit; means, carried by the drive sub, for engaging the front end of the sleeve to stop its axial movement along the drive sub at a pre-determined position; a retainer sub for threadably engaging the rear end connection of the drive sub and bearing against the rear end of the sleeve to lock the sleeve in the pre-determined position; the sleeve carrying at least one rotary cutting element assembly at its front end; the drive sub forming ports for jetting drilling fluid contiguous to the cutting elements when the sleeve is locked in the pre-determined position.
- FIG. 1 is a perspective sectional side view of a hole-opener in accordance with the prior art;
- FIG. 2 is a partly sectional side view of an assembled hole-opener in accordance with the present invention;
- FIG. 3 is a sectional side view of the drive sub;
- FIG. 4 is a sectional side view of the retainer sub; and
- FIG. 5 is a sectional side view of the sleeve showing a slot, the arms and rotary cones.
- The tool or hole-opener1 comprises a
drive sub 2, asleeve 3 and a retainer sub 4. - ‘Subs’ are used because they are heavy steel tubulars equipped with threaded pins and boxes adapted to connect with the connections of drill pipe commonly used in this service. The subs are adapted to be ‘made up’ and ‘broken’ by the rig equipment. However the subs have been modified in certain respects, as described below, to prepare them for use in this tool.
- More particularly, the
drive sub 2 has abox connection 5 at itsfront end 6 and apin connection 7 at itsrear end 8.Stabilizer bars 9 are welded to the drive sub's external surface 10. Thesestabilizer bars 9 extend longitudinally of thedrive sub 2 at spaced positions around its circumference. Thestabilizer bars 9 are designed to centralize the tool in the pilot hole (not shown). They also function to act as stops limiting axial advance of thesleeve 3 along thedrive sub 2 and as part of the rotary drive connection between thedrive sub 2 andsleeve 3. The drivesub side wall 11 also formsports 12, between thestabilizer bars 9, for jetting drilling fluid into the annulus formed between the tool and the borehole wall. - The
sleeve 3 is formed withslots 13 in itsforward end 14, for receiving thestabilizer bars 9. Theside walls 15 of theslots 13 and thebars 9 combine to lock thesleeve 3 and drivesub 2 together for rotation as a unit. Thesleeve 3 also carries a plurality of outwardly protrudingarms 16 affixed to the front end of the sleeve'souter surface 17. Thearms 16 extend longitudinally of thesleeve 3 in spaced apart arrangement. Eacharm 16 carries a rotatably mounted,toothed cone 18 at itsfront end 19. Thecones 18 are positioned adjacent thejet ports 12. - The retainer sub4 has a
box connection 20 at its front end, sized to be slidably received in the rear end of thebore 21 of thesleeve 3. Thebox connection 20 is connected with thepin connection 7 of thedrive sub 2. The retainer sub 4 also has aradial shoulder 22 which abuts the rear end face 23 of thesleeve 2 when the tool is assembled. The retainer sub 4, being threadably engaged with thedrive sub 2, therefore functions to transmit axial pull from thedrill string 24 to thesleeve 3 and itsrotary cones 18. In addition, theretainer sub shoulder 22 combines with the stabilizer bars 9 to lock thesleeve 3 in a pre-determined position with thecones 18 positioned opposite thejet ports 12. - A
plug sub 25 is threaded onto therear pin connection 26 of the retainer sub 4, to close off itsbore 27. - The resultant tool can be disassembled by backing off and removing the retainer sub4 and removing and replacing the
sleeve 3. This is done when thecones 18 are worn or are to be replaced to cut a larger diameter borehole. - It is contemplated that variants of the described tool can be implemented by those skilled in the art without changing the substance of the tool. For example, splines can be used to lock the drive sub and sleeve for rotation together. In addition, the tubular retainer sub can be replaced with a plug—the term ‘retainer sub’ is intended to be interpreted to include a plug.
Claims (4)
1. A hole-opener for enlarging the diameter of a pilot hole, the hole-opener having front and rear ends and comprising:
a tubular drive sub having an external surface, a longitudinal bore and threaded connections at its front and rear ends;
a tubular sleeve for sliding axially over the rear end of the drive sub;
means for locking the sleeve and drive sub together for rotation as a unit;
means, carried by the drive sub, for engaging the front end of the sleeve to stop its axial movement along the drive sub at a pre-determined position;
a retainer sub for threadably engaging the rear end connection of the drive sub and bearing against the rear end of the sleeve to lock the sleeve in the pre-determined position;
the sleeve carrying at least one rotary cutting element assembly at its front end;
the drive sub forming ports for jetting drilling fluid contiguous to the cutting elements when the sleeve is locked in the pre-determined position.
2. The hole-opener as set forth in claim 1 wherein the drive sub has outwardly protruding, circumferentially spaced apart bars affixed to its external surface and extending longitudinally thereof and the front end of the sleeve is slotted to engage the bars to stop forward axial movement of the sleeve and to lock the sleeve and drive sub together for rotation as a unit.
3. A hole-opener for enlarging the diameter of a pilot hole, the hole-opener having front and rear ends and comprising:
a tubular drive sub having an external surface, a longitudinal bore and threaded connections at its front and rear ends;
a tubular sleeve mounted on the rear end of the drive sub;
means for locking the sleeve and drive sub together for rotation as a unit;
means, carried by the drive sub and engaging the front end of the sleeve, for stopping the sleeve at a pre-determined position;
a retainer sub threadably engaging the rear end connection of the drive sub and having a shoulder bearing against the rear end of the sleeve to lock the sleeve in the pre-determined position;
the sleeve carrying a plurality of rotary cutting element assemblies at its front end;
the drive sub forming ports for jetting drilling fluid contiguous to the cutting elements.
4. The hole-opener as set forth in claim 3 wherein the drive sub has outwardly protruding, circumferentially spaced apart bars affixed to its external surface and extending longitudinally thereof and the front end of the sleeve forms slots engaging the bars so that the bars cooperate with the retainer sub to lock the sleeve axially in the pre-determined position, the bars and sleeve interlock so that the drive sub and sleeve will rotate as a unit and the drive sub will impart pulling force to the sleeve through the retainer sub.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/255,633 US20040060741A1 (en) | 2002-09-27 | 2002-09-27 | Hole-opener for enlarging pilot hole |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/255,633 US20040060741A1 (en) | 2002-09-27 | 2002-09-27 | Hole-opener for enlarging pilot hole |
Publications (1)
Publication Number | Publication Date |
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US20040060741A1 true US20040060741A1 (en) | 2004-04-01 |
Family
ID=32029151
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US10/255,633 Abandoned US20040060741A1 (en) | 2002-09-27 | 2002-09-27 | Hole-opener for enlarging pilot hole |
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US (1) | US20040060741A1 (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100116556A1 (en) * | 2008-11-11 | 2010-05-13 | Baker Hughes Incorporated | Pilot reamer with composite framework |
US8191635B2 (en) | 2009-10-06 | 2012-06-05 | Baker Hughes Incorporated | Hole opener with hybrid reaming section |
US8448724B2 (en) | 2009-10-06 | 2013-05-28 | Baker Hughes Incorporated | Hole opener with hybrid reaming section |
US9714544B2 (en) | 2013-05-20 | 2017-07-25 | The Charles Machine Works, Inc. | Reamer with replaceable rolling cutters |
US10316619B2 (en) | 2017-03-16 | 2019-06-11 | Saudi Arabian Oil Company | Systems and methods for stage cementing |
US10378339B2 (en) | 2017-11-08 | 2019-08-13 | Saudi Arabian Oil Company | Method and apparatus for controlling wellbore operations |
US10378298B2 (en) | 2017-08-02 | 2019-08-13 | Saudi Arabian Oil Company | Vibration-induced installation of wellbore casing |
US10487604B2 (en) | 2017-08-02 | 2019-11-26 | Saudi Arabian Oil Company | Vibration-induced installation of wellbore casing |
US10544648B2 (en) | 2017-04-12 | 2020-01-28 | Saudi Arabian Oil Company | Systems and methods for sealing a wellbore |
US10557330B2 (en) | 2017-04-24 | 2020-02-11 | Saudi Arabian Oil Company | Interchangeable wellbore cleaning modules |
US10597962B2 (en) | 2017-09-28 | 2020-03-24 | Saudi Arabian Oil Company | Drilling with a whipstock system |
US10612362B2 (en) | 2018-05-18 | 2020-04-07 | Saudi Arabian Oil Company | Coiled tubing multifunctional quad-axial visual monitoring and recording |
US10619420B2 (en) | 2013-05-20 | 2020-04-14 | The Charles Machine Works, Inc. | Reamer with replaceable rolling cutters |
US10689913B2 (en) | 2018-03-21 | 2020-06-23 | Saudi Arabian Oil Company | Supporting a string within a wellbore with a smart stabilizer |
US10689914B2 (en) | 2018-03-21 | 2020-06-23 | Saudi Arabian Oil Company | Opening a wellbore with a smart hole-opener |
US10794170B2 (en) | 2018-04-24 | 2020-10-06 | Saudi Arabian Oil Company | Smart system for selection of wellbore drilling fluid loss circulation material |
US11299968B2 (en) | 2020-04-06 | 2022-04-12 | Saudi Arabian Oil Company | Reducing wellbore annular pressure with a release system |
US11396789B2 (en) | 2020-07-28 | 2022-07-26 | Saudi Arabian Oil Company | Isolating a wellbore with a wellbore isolation system |
US11414942B2 (en) | 2020-10-14 | 2022-08-16 | Saudi Arabian Oil Company | Packer installation systems and related methods |
US11624265B1 (en) | 2021-11-12 | 2023-04-11 | Saudi Arabian Oil Company | Cutting pipes in wellbores using downhole autonomous jet cutting tools |
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Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
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US7992658B2 (en) | 2008-11-11 | 2011-08-09 | Baker Hughes Incorporated | Pilot reamer with composite framework |
US20100116556A1 (en) * | 2008-11-11 | 2010-05-13 | Baker Hughes Incorporated | Pilot reamer with composite framework |
US8191635B2 (en) | 2009-10-06 | 2012-06-05 | Baker Hughes Incorporated | Hole opener with hybrid reaming section |
US8347989B2 (en) | 2009-10-06 | 2013-01-08 | Baker Hughes Incorporated | Hole opener with hybrid reaming section and method of making |
US8448724B2 (en) | 2009-10-06 | 2013-05-28 | Baker Hughes Incorporated | Hole opener with hybrid reaming section |
US9714544B2 (en) | 2013-05-20 | 2017-07-25 | The Charles Machine Works, Inc. | Reamer with replaceable rolling cutters |
US10619420B2 (en) | 2013-05-20 | 2020-04-14 | The Charles Machine Works, Inc. | Reamer with replaceable rolling cutters |
US10316619B2 (en) | 2017-03-16 | 2019-06-11 | Saudi Arabian Oil Company | Systems and methods for stage cementing |
US10544648B2 (en) | 2017-04-12 | 2020-01-28 | Saudi Arabian Oil Company | Systems and methods for sealing a wellbore |
US10557330B2 (en) | 2017-04-24 | 2020-02-11 | Saudi Arabian Oil Company | Interchangeable wellbore cleaning modules |
US10920517B2 (en) | 2017-08-02 | 2021-02-16 | Saudi Arabian Oil Company | Vibration-induced installation of wellbore casing |
US10487604B2 (en) | 2017-08-02 | 2019-11-26 | Saudi Arabian Oil Company | Vibration-induced installation of wellbore casing |
US10378298B2 (en) | 2017-08-02 | 2019-08-13 | Saudi Arabian Oil Company | Vibration-induced installation of wellbore casing |
US10597962B2 (en) | 2017-09-28 | 2020-03-24 | Saudi Arabian Oil Company | Drilling with a whipstock system |
US10378339B2 (en) | 2017-11-08 | 2019-08-13 | Saudi Arabian Oil Company | Method and apparatus for controlling wellbore operations |
US10689913B2 (en) | 2018-03-21 | 2020-06-23 | Saudi Arabian Oil Company | Supporting a string within a wellbore with a smart stabilizer |
US10689914B2 (en) | 2018-03-21 | 2020-06-23 | Saudi Arabian Oil Company | Opening a wellbore with a smart hole-opener |
US10794170B2 (en) | 2018-04-24 | 2020-10-06 | Saudi Arabian Oil Company | Smart system for selection of wellbore drilling fluid loss circulation material |
US11268369B2 (en) | 2018-04-24 | 2022-03-08 | Saudi Arabian Oil Company | Smart system for selection of wellbore drilling fluid loss circulation material |
US10612362B2 (en) | 2018-05-18 | 2020-04-07 | Saudi Arabian Oil Company | Coiled tubing multifunctional quad-axial visual monitoring and recording |
US11299968B2 (en) | 2020-04-06 | 2022-04-12 | Saudi Arabian Oil Company | Reducing wellbore annular pressure with a release system |
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