US20040173362A1 - Electric downhole safety valve - Google Patents
Electric downhole safety valve Download PDFInfo
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- US20040173362A1 US20040173362A1 US10/748,515 US74851503A US2004173362A1 US 20040173362 A1 US20040173362 A1 US 20040173362A1 US 74851503 A US74851503 A US 74851503A US 2004173362 A1 US2004173362 A1 US 2004173362A1
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- flow tube
- closure element
- bore
- valve according
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
Definitions
- the present invention relates generally to downhole safety valves and more particularly to a downhole safety valve that is electrically operated.
- the invention relates to a surface controlled subsurface safety valve (SCSSV) for a sub-terranean well and, more particularly, to a safety valve utilizing an electrical actuation mechanism controlled from the surface or by a downhole intelligent controller.
- SCSSV surface controlled subsurface safety valve
- Oil and gas wells typically employ at least one safety valve that can be actuated to stop or control the flow of fluid through a pipe. These valves are normally positioned downhole to close the bore of the tubing string extending from one or more production zones to the well surface.
- Safety valves of this type include a spring that biases the valve to a fail-safe mode, such that an interruption in the force acting to keep the valve open will cause the valve to close.
- the present invention provides an electrically operated downhole safety valve that can operate effectively and reliably using available power downhole.
- the present system fits into a casing no larger than would be required for a comparable hydraulic unit.
- FIG. 1 is a schematic cross-section of a device constructed in accordance with a preferred embodiment of the present invention, showing the valve in a closed position;
- FIG. 2 is a schematic cross-section of the device of FIG. 1, showing the valve in a open position
- FIG. 3 is a cross-section taken along lines 3 - 3 of FIG. 2;
- FIGS. 4 and 5 are cross-sections taken along lines 4 - 4 and 5 - 5 of FIG. 2, showing the restraining mechanism in its de-energized and energized states, respectively.
- a device constructed in accordance with a preferred embodiment of the present invention comprises a generally cylindrical body 10 having a central bore 12 therethrough and a concentric flow tube 50 slidably mounted in bore 12 .
- Body 10 includes a first end 13 and a second end 14 , and preferably includes female threads 15 at each end.
- bore 12 includes a valve receptacle 16 , a spring receptacle 26 , an eccentric gearbox receptacle 36 , and a guide groove 46 , all described in detail below.
- Flow tube 50 comprises a cylindrical tube having a first end 53 and a second end 54 .
- the outer surface of flow tube 50 includes a first, annular extension 56 spaced a first distance from first end 53 and a second, non-annular extension 58 spaced a further distance from first end 53 .
- the outer surface of flow tube 50 includes an outwardly extending follower pin 59 between annular extension 56 and non-annular extension 58 .
- closure element 20 In its closed position, closure element 20 preferably substantially obstructs the flow of fluid through bore 12 and in its open position it does not. It will be understood that the closed and open positions need not be completely closed or completely open. In other words, the closed and open positions may be merely relative; namely, the closed position being one in which less fluid is allowed to pass than is allowed in the open position.
- Spring 22 is preferably mounted between closure element 20 and body 10 such that it bears on closure element and urges it into its closed position. Sprint 22 is shown as a coil spring, but it will be understood that spring 22 can comprise any suitable biasing member.
- Spring receptacle 26 comprises a second increased diameter portion in bore 12 spaced farther from end 13 than valve receptacle 16 .
- Spring receptacle 26 is bounded by a lower annular shoulder 27 and an upper annular shoulder 28 .
- the inner diameter of spring receptacle 26 is greater than the outer diameter of flow tube 50 , creating an annular chamber 29 therebetween.
- a coil spring 30 is preferably disposed in chamber 29 between lower annular shoulder 27 of spring receptacle 26 and annular extension 56 of flow tube 50 .
- Spring 30 is preferably sized such that it is compressed and urges flow tube 50 away from first end 13 even when annular extension 56 bears on upper annular shoulder 28 .
- Eccentric gearbox receptacle 36 comprises a third enlarged portion in bore 12 and is spaced farther from end 13 than spring receptacle 26 .
- Eccentric gearbox receptacle 36 comprises a lower portion 37 and an upper portion 38 .
- Lower portion 37 houses at least one and preferably a plurality of drive motors 40 , gearboxes 42 , and gears 44 .
- Upper portion 38 houses a rotating sleeve 46 .
- Rotating sleeve 46 includes a looped groove 48 , which includes a helical portion 47 , a short, transverse portion 51 , and a straight portion 49 .
- Looped groove 48 receives follower pin 59 on flow tube 50 .
- follower pin 59 is disposed at a junction between straight portion 49 and helical portion 47 .
- Drive motors 40 , gearboxes 42 , gears 44 and rotating sleeve 46 are preferably operably connected such that power supplied to drive motors 40 causes motors 40 drive gearboxes 42 , which in turn drive gears 44 , which in turn cause rotating sleeve 46 to rotate about the axis of body 10 and flow tube 50 .
- FIG. 3 is a cross-sectional view along the axis of the device with the rotating sleeve 46 removed so as to show the plurality of gearboxes 42 and gears 44 .
- FIG. 3 also illustrates the extension of follower pin 59 from the outer surface of flow tube 50 .
- Guide groove 46 extends longitudinally along a portion of bore 12 and receives non-annular extension 58 of flow tube 50 .
- guide groove 46 preferably is wide enough to include at least a pair of retaining members 68 .
- Retaining members 68 are actuable between an open position, shown in FIG. 4, and a closed position, shown in FIG. 5. In their closed position, retaining members 68 engage extension 58 so as to prevent flow tube 50 from moving relative to body 10 .
- Retaining members 68 and drive motors 40 receive electrical power from electrical leads 7 , 9 , respectively.
- Conductors 7 , 9 preferably enter body 10 through electrical penetrator 8 .
- Conductors 7 , 9 electrically connect to a local control unit 100 , which is in turn electrically connected to a remote control unit 102 .
- a plurality of seals 70 are preferably provided between body 10 and flow tube 50 so as to isolate guide groove 46 , eccentric gearbox receptacle 36 , and spring receptacle 26 and prevent the ingress of fluid thereinto.
- a preferred first step is to equalize pressure on both sides of closure element 20 .
- power is supplied to motors 40 via conductors 9 .
- Motors 40 drive gearboxes 42 , which in turn advance gears 44 , causing sleeve 46 to rotate such that follower pin 59 enters the helical portion 47 of loop 48 .
- sleeve 46 rotates, helical groove 47 bears on pin 59 , urging flow tube 50 toward first end 13 of body 10 . Because flow tube 50 is prevented from rotating by engagement of extension 58 with guide groove 46 , the rotation of sleeve 46 causes flow tube 50 to advance longitudinally through body 10 .
- annular extension 56 compresses spring 30 and first end 53 bears on closure element 20 , forcing it open. If pressure is not equalized before the opening sequence, more power may be required to open the valve.
- Rotation of sleeve 46 is then preferably continued, without further advancing flow tube 50 , as follower pin 59 traverses transverse portion 51 of loop 48 , until follower pin 59 rests at the juncture of transverse portion 51 and straight portion 49 , as shown in FIG. 2.
- the present invention is normally closed, it is a fail-safe valve. Once the device has attained the open state shown in FIG. 2, flow can continue through it until either the device is closed deliberately, the power supplied to retaining members 68 is interrupted, or retaining members 68 fail. When any of these events occurs, retaining members 68 cease to hold extension 58 and thus cease to prevent flow tube 50 from moving axially. This allows spring 30 to drive flow tube 50 away from first end 13 . As flow tube 50 advances toward second end 14 , follower pin 59 traverses straight portion 49 of loop 48 . Flow tube 50 is sized such that when annular extension 56 bears on upper annular shoulder 28 , its first end 53 clears upper annular shoulder 18 , allowing closure element 20 to fully close bore 12 .
- the device preferably includes a plurality of motors 40 , a plurality of gearboxes 42 , and a plurality of gears 44 , it is multiply redundant, ensuring that it remains operable even in the event that one or more of its components fail.
- the gear train may be fitted with multiple slip clutches that will allow the device to operate even if one or more of the redundant drive motors fail.
- Retaining members 68 can be any electrically actuable device and are shown as a pair of electrically actuated dogs.
- retaining members 68 each comprise at least one flux carrier in conjunction with at least one coil.
- the coils are connected to conductors 7 . When power is supplied to the coils, they induce flux in the flux carriers, which in turn advance toward extension 58 and ultimately engage it.
- the present device avoids the need for hydraulic systems.
- Flow tube 50 preferably includes a static sealing member at its first end 53 , which forms a seal with frustoconical shoulder 17 when the device is open. Flow tube 50 can be rotated to remove deposits that would otherwise impede travel of the tube. In some embodiments, flow tube 50 includes a toothed cutting edge to facilitate removal of deposits.
- the relative positions of the drive mechanism and spring 30 may be reversed, such that the flow tube is pulled into the open position against the spring force.
- the device it is still preferred that the device be normally closed, so that it can function as a fail-safe device. Nonetheless, it is contemplated that in other embodiments, the configuration may be modified such that the device is normally open.
- the relative positions of spring 30 and the drive mechanism may again be such that the drive mechanism either pulls or pushes the flow tube into the closed position.
- closure element 20 shown above as a single component could comprise multiple components and/or could operate in various other ways.
- closure element 20 could comprise a shutter-type closure, a ball valve, a stopcock-type closure, or any other suitable closure device.
- the spring- loaded pivoting mechanism described above could comprise any suitable biasing means such as are known in the art.
- the drive mechanism described above as formed by the combination of gears, rotating sleeve, and follower pin could be replaced with a drive mechanism comprising solely gears, with the drive motors rotating a set of gears to either directly or indirectly advance the flow tube.
- the flow tube could include gear teeth on a portion of its outer surface.
- a plurality of powered drive mechanisms can be included and can include one-way drive clutches.
- the drive mechanism(s) can be configured so as to allow nonfunctioning drive mechanisms to be mechanically decoupled.
- Coil spring 30 can be replaced with a biasing means that is better suited to operate in tension, rather than in compression, if desired.
- Flow tube 50 can be replaced with a non-tubular element, although a tubular element is preferred because it is mechanically robust and protects the various components of the device from contact with the fluid.
- retaining members 68 could be replaced with a single member, or multiple members, mounted inline with extension 58 , which when face to face with extension 58 can retain extension 58 when energized.
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- Mechanically-Actuated Valves (AREA)
Abstract
An electrically actuated fail-safe valve for controlling fluid flow in deepwater drilling operations comprises a body having a bore therethrough, a closure element mounted in the bore and actuable between a closed position and an open position, a flow tube slidably mounted in the bore, the tube being actuable between a first position in which it does not interfere with the normal bias of the closure and a second position in which it opposes the normal bias of the closure, and a drive mechanism causing the tube to advance from its first to its second position. The drive mechanism comprises a gear drive, a rotating sleeve including a helical groove, and a follower pin on the flow tube and received in the helical groove. Power supplied to the drive causes the sleeve to rotate, bearing on the follower pin and advancing the flow tube to its second position.
Description
- This application is a continuation-in-part of U.S. Provisional Application Serial No. 60/437,070, filed Dec. 30, 2002 and entitled “Electric Downhole Safety Valve,” which is incorporated herein by reference.
- Not Applicable.
- The present invention relates generally to downhole safety valves and more particularly to a downhole safety valve that is electrically operated.
- The invention relates to a surface controlled subsurface safety valve (SCSSV) for a sub-terranean well and, more particularly, to a safety valve utilizing an electrical actuation mechanism controlled from the surface or by a downhole intelligent controller.
- Oil and gas wells typically employ at least one safety valve that can be actuated to stop or control the flow of fluid through a pipe. These valves are normally positioned downhole to close the bore of the tubing string extending from one or more production zones to the well surface. Safety valves of this type include a spring that biases the valve to a fail-safe mode, such that an interruption in the force acting to keep the valve open will cause the valve to close.
- Conventional downhole safety valves are hydraulically operated. As oil and gas reserves are developed in deepwater, however, the column of fluid needed for hydraulic actuation becomes impractically long. Specifically, the hydrostatic head developed in a conventional hydraulically controlled valve results in high operating pressures and requires an unworkably large failsafe spring.
- Because of the problems with hydraulically controlled safety valves, electrically operated safety valves are an attractive alternative. In addition, intelligent completion systems are being developed that are equipped with a variety of electrically driven flow control devices. Hence, it is currently desirable to provide an all-electric control system and remove the requirement for any hydraulic supply. Electrically controlled downhole safety valves have been developed, but they generally require high power consumption and/or unfavorably large geometry, and are vulnerable to problems with electrical connections to the surface.
- Hence, it remains desirable to provide an electrically operated downhole safety valve that can operate effectively and reliably at deep setting depths, using available power downhole.
- The present invention provides an electrically operated downhole safety valve that can operate effectively and reliably using available power downhole. In a preferred embodiment, the present system fits into a casing no larger than would be required for a comparable hydraulic unit.
- The various characteristics described above, as well as other features, will be readily apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments of the invention, and by referring to the accompanying drawings.
- For a more detailed description of the preferred embodiments of the present invention, reference will now be made to the accompanying drawings, wherein:
- FIG. 1 is a schematic cross-section of a device constructed in accordance with a preferred embodiment of the present invention, showing the valve in a closed position;
- FIG. 2 is a schematic cross-section of the device of FIG. 1, showing the valve in a open position;
- FIG. 3 is a cross-section taken along lines3-3 of FIG. 2; and
- FIGS. 4 and 5 are cross-sections taken along lines4-4 and 5-5 of FIG. 2, showing the restraining mechanism in its de-energized and energized states, respectively.
- Referring initially to FIG. 1, a device constructed in accordance with a preferred embodiment of the present invention comprises a generally
cylindrical body 10 having acentral bore 12 therethrough and aconcentric flow tube 50 slidably mounted inbore 12.Body 10 includes afirst end 13 and asecond end 14, and preferably includesfemale threads 15 at each end. In addition,bore 12 includes avalve receptacle 16, aspring receptacle 26, aneccentric gearbox receptacle 36, and aguide groove 46, all described in detail below. -
Flow tube 50 comprises a cylindrical tube having a first end 53 and asecond end 54. The outer surface offlow tube 50 includes a first,annular extension 56 spaced a first distance from first end 53 and a second,non-annular extension 58 spaced a further distance from first end 53. In addition, the outer surface offlow tube 50 includes an outwardly extendingfollower pin 59 betweenannular extension 56 andnon-annular extension 58. - Referring still to FIG. 2 and in particular to bore12 in
body 10,valve receptacle 16 comprises a first increased diameter portion inbore 12.Valve receptacle 16 is bounded by a lower,frustoconical shoulder 17 and an upper,annular shoulder 18. The inside diameter ofvalve receptacle 16 is greater than the outer diameter offlow tube 50, creating achamber 19 therebetween. Aclosure element 20 is housed inchamber 19, along with aspring 22.Closure element 20 is pivotally mounted such that it can pivot about a transverse axis between a closed position, shown in FIG. 1, in which it bears onannular shoulder 18, and an open position, shown in FIG. 2. In its closed position,closure element 20 preferably substantially obstructs the flow of fluid throughbore 12 and in its open position it does not. It will be understood that the closed and open positions need not be completely closed or completely open. In other words, the closed and open positions may be merely relative; namely, the closed position being one in which less fluid is allowed to pass than is allowed in the open position.Spring 22 is preferably mounted betweenclosure element 20 andbody 10 such that it bears on closure element and urges it into its closed position.Sprint 22 is shown as a coil spring, but it will be understood thatspring 22 can comprise any suitable biasing member. -
Spring receptacle 26 comprises a second increased diameter portion inbore 12 spaced farther fromend 13 thanvalve receptacle 16.Spring receptacle 26 is bounded by a lowerannular shoulder 27 and an upperannular shoulder 28. The inner diameter ofspring receptacle 26 is greater than the outer diameter offlow tube 50, creating anannular chamber 29 therebetween. Acoil spring 30 is preferably disposed inchamber 29 between lowerannular shoulder 27 ofspring receptacle 26 andannular extension 56 offlow tube 50.Spring 30 is preferably sized such that it is compressed and urgesflow tube 50 away fromfirst end 13 even whenannular extension 56 bears on upperannular shoulder 28. -
Eccentric gearbox receptacle 36 comprises a third enlarged portion inbore 12 and is spaced farther fromend 13 thanspring receptacle 26.Eccentric gearbox receptacle 36 comprises alower portion 37 and an upper portion 38.Lower portion 37 houses at least one and preferably a plurality ofdrive motors 40,gearboxes 42, andgears 44. Upper portion 38 houses a rotatingsleeve 46.Rotating sleeve 46 includes a loopedgroove 48, which includes ahelical portion 47, a short,transverse portion 51, and astraight portion 49. Loopedgroove 48 receivesfollower pin 59 onflow tube 50. Whenclosure element 20 is in the closed position shown in FIG. 1,follower pin 59 is disposed at a junction betweenstraight portion 49 andhelical portion 47. -
Drive motors 40,gearboxes 42,gears 44 and rotatingsleeve 46 are preferably operably connected such that power supplied to drivemotors 40 causesmotors 40drive gearboxes 42, which inturn drive gears 44, which in turn cause rotatingsleeve 46 to rotate about the axis ofbody 10 andflow tube 50. FIG. 3 is a cross-sectional view along the axis of the device with therotating sleeve 46 removed so as to show the plurality ofgearboxes 42 andgears 44. FIG. 3 also illustrates the extension offollower pin 59 from the outer surface offlow tube 50. -
Guide groove 46 extends longitudinally along a portion ofbore 12 and receivesnon-annular extension 58 offlow tube 50. Referring briefly to FIGS. 4 and 5,guide groove 46 preferably is wide enough to include at least a pair of retainingmembers 68. Retainingmembers 68 are actuable between an open position, shown in FIG. 4, and a closed position, shown in FIG. 5. In their closed position, retainingmembers 68 engageextension 58 so as to preventflow tube 50 from moving relative tobody 10. - Retaining
members 68 and drivemotors 40 receive electrical power fromelectrical leads Conductors body 10 throughelectrical penetrator 8.Conductors local control unit 100, which is in turn electrically connected to aremote control unit 102. - A plurality of
seals 70 are preferably provided betweenbody 10 and flowtube 50 so as to isolateguide groove 46,eccentric gearbox receptacle 36, andspring receptacle 26 and prevent the ingress of fluid thereinto. - Operation
- When it is desired to open
bore 12 and allow fluid flow therethrough, a preferred first step is to equalize pressure on both sides ofclosure element 20. With pressure equalized, power is supplied tomotors 40 viaconductors 9.Motors 40drive gearboxes 42, which in turn advance gears 44, causingsleeve 46 to rotate such thatfollower pin 59 enters thehelical portion 47 ofloop 48. Assleeve 46 rotates,helical groove 47 bears onpin 59, urgingflow tube 50 towardfirst end 13 ofbody 10. Becauseflow tube 50 is prevented from rotating by engagement ofextension 58 withguide groove 46, the rotation ofsleeve 46 causes flowtube 50 to advance longitudinally throughbody 10. Asflow tube 50 advances relative tobody 10 in response to the force applied by rotatingsleeve 46,annular extension 56compresses spring 30 and first end 53 bears onclosure element 20, forcing it open. If pressure is not equalized before the opening sequence, more power may be required to open the valve. - When the opening process is complete, the tool is in the position shown in FIG. 2. Specifically, end53 of
flow tube 50 rests onfrustoconical shoulder 17 andclosure element 20 is contained betweenbody 10 and flowtube 50.Bore 12 is open along the length of the tool,spring 30 is compressed, andfollower pin 59 rests at the juncture ofhelical portion 47 andstraight portion 49, as shown in phantom. At this point, power is supplied to retainingmembers 68, causing them to come together and engageextension 58 offlow tube 50 so as to prevent it from moving axially withinbody 10. Rotation ofsleeve 46 is then preferably continued, without further advancingflow tube 50, asfollower pin 59 traversestransverse portion 51 ofloop 48, untilfollower pin 59 rests at the juncture oftransverse portion 51 andstraight portion 49, as shown in FIG. 2. - Because the present invention is normally closed, it is a fail-safe valve. Once the device has attained the open state shown in FIG. 2, flow can continue through it until either the device is closed deliberately, the power supplied to retaining
members 68 is interrupted, or retainingmembers 68 fail. When any of these events occurs, retainingmembers 68 cease to holdextension 58 and thus cease to preventflow tube 50 from moving axially. This allowsspring 30 to driveflow tube 50 away fromfirst end 13. Asflow tube 50 advances towardsecond end 14,follower pin 59 traversesstraight portion 49 ofloop 48.Flow tube 50 is sized such that whenannular extension 56 bears on upperannular shoulder 28, its first end 53 clears upperannular shoulder 18, allowingclosure element 20 to fullyclose bore 12. - Because the device preferably includes a plurality of
motors 40, a plurality ofgearboxes 42, and a plurality ofgears 44, it is multiply redundant, ensuring that it remains operable even in the event that one or more of its components fail. In addition, the gear train may be fitted with multiple slip clutches that will allow the device to operate even if one or more of the redundant drive motors fail. - Retaining
members 68 can be any electrically actuable device and are shown as a pair of electrically actuated dogs. In a preferred embodiment, retainingmembers 68 each comprise at least one flux carrier in conjunction with at least one coil. The coils are connected toconductors 7. When power is supplied to the coils, they induce flux in the flux carriers, which in turn advance towardextension 58 and ultimately engage it. By using electrical actuation and electrical power, the present device avoids the need for hydraulic systems. -
Flow tube 50 preferably includes a static sealing member at its first end 53, which forms a seal withfrustoconical shoulder 17 when the device is open.Flow tube 50 can be rotated to remove deposits that would otherwise impede travel of the tube. In some embodiments, flowtube 50 includes a toothed cutting edge to facilitate removal of deposits. - In still another alternative embodiment, the relative positions of the drive mechanism and
spring 30 may be reversed, such that the flow tube is pulled into the open position against the spring force. In this embodiment it is still preferred that the device be normally closed, so that it can function as a fail-safe device. Nonetheless, it is contemplated that in other embodiments, the configuration may be modified such that the device is normally open. In these embodiments, the relative positions ofspring 30 and the drive mechanism may again be such that the drive mechanism either pulls or pushes the flow tube into the closed position. - While certain preferred embodiments of the present invention has been shown and described, it will be understood that a variety of modifications could be made thereto without departing from the scope of the present invention. For example, the guiding and retaining functions performed by
extension 58 could be performed by separate elements.Closure element 20, shown above as a single component could comprise multiple components and/or could operate in various other ways. For example,closure element 20 could comprise a shutter-type closure, a ball valve, a stopcock-type closure, or any other suitable closure device. Likewise, the spring- loaded pivoting mechanism described above could comprise any suitable biasing means such as are known in the art. - The drive mechanism described above as formed by the combination of gears, rotating sleeve, and follower pin could be replaced with a drive mechanism comprising solely gears, with the drive motors rotating a set of gears to either directly or indirectly advance the flow tube. For example, the flow tube could include gear teeth on a portion of its outer surface. Similarly, a plurality of powered drive mechanisms can be included and can include one-way drive clutches. The drive mechanism(s) can be configured so as to allow nonfunctioning drive mechanisms to be mechanically decoupled.
-
Coil spring 30 can be replaced with a biasing means that is better suited to operate in tension, rather than in compression, if desired.Flow tube 50 can be replaced with a non-tubular element, although a tubular element is preferred because it is mechanically robust and protects the various components of the device from contact with the fluid. Similarly, retainingmembers 68 could be replaced with a single member, or multiple members, mounted inline withextension 58, which when face to face withextension 58 can retainextension 58 when energized. - The embodiments described herein are exemplary only and are not limiting. One skilled in the art will understand that the mechanisms described herein could each be replaced with alternative mechanisms, so long as the invention is within the scope of the claims that follow. Accordingly, the scope of protection is not limited to the embodiments described herein, but is only limited by the claims which follow, the scope of which shall include all equivalents of the subject matter of the claims. Also, in the claims that follow, the sequential recitation of steps is not intended to require that the steps be performed in the order recited, or that any given step be completed before another step is begun.
Claims (21)
1. An electrically actuated fail-safe valve for controlling fluid flow in a deepwater drilling operation, comprising:
a body having a bore therethrough;
a closure element mounted in the bore and actuable between a closed position in which said bore is relatively obstructed and an open position in which said bore is relatively open, said closure element being biased to one of said closed and open positions;
a flow tube slidably mounted in said bore, said flow tube being actuable between a first position in which said flow tube does not interfere with the normal bias of said closure element and a second position in which said flow tube opposes the normal bias of said closure element so as to maintain said closure element in the other of said closed and open positions;
an electrically powered drive mechanism mounted in said body and engaging said flow tube so as to advance said flow tube from said first position to said second position.
2. The valve according to claim 1 wherein said closure element is biased into said closed position and said drive mechanism advances said flow tube such that said flow tube actuates said closure element to said open position.
3. The valve according to claim 1 , further including a plurality of powered drive mechanisms, said drive mechanisms including one-way drive clutches and allowing nonfunctioning drive mechanisms to be mechanically decoupled.
4. The valve according to claim 1 wherein the drive mechanism comprises:
a gear drive,
a rotating sleeve mounted in said body, said rotating sleeve including a helical groove, and
a follower pin mounted on said flow tube and received in said helical groove;
such that electrical power supplied to said gear drive causes said rotating sleeve to rotate, which in turn bears on said follower pin and advances said flow tube to said second position.
5. The valve according to claim 4 wherein the helical groove includes a straight portion substantially parallel to the longitudinal axis of said bore.
6. The valve according to claim 4 wherein the helical groove includes a transverse portion substantially perpendicular to the longitudinal axis of said bore.
7. The valve according to claim 4 , further including means for preventing longitudinal rotation of said flow tube.
8. The valve according to claim 1 , further including an electrically actuable retaining mechanism mounted in said body and actuable between an engaged position in which said retaining mechanism engages said flow tube and prevents axial movement of said flow tube relative to said body and a disengaged position in which said retaining mechanism allows axial movement of said flow tube relative to said body.
8. The valve according to claim 1 , further including a biasing means urging said flow tube into said first position.
9. An electrically actuated fail-safe valve for controlling fluid flow in a deepwater drilling operation, comprising:
a body having a bore therethrough;
a closure element mounted in the bore and actuable between a closed position in which said bore is relatively obstructed and an open position in which said bore is relatively open, said closure element being biased to said closed position;
a flow tube slidably mounted in said bore, said flow tube being actuable between a first position in which said flow tube does not interfere with the normal bias of said closure element and a second position in which said flow tube opposes the normal bias of said closure element so as to maintain said closure element in the other of said closed and open positions;
an electrically powered drive mechanism mounted in said body and engaging said flow tube so as to advance said flow tube from said first position to said second position such that said flow tube actuates said closure element to said open position, said drive mechanism comprising:
a gear drive,
a rotating sleeve mounted in said body, said rotating sleeve including a helical groove, and
a follower pin mounted on said flow tube and received in said helical groove;
wherein power supplied to said gear drive causes said rotating sleeve to rotate, which in turn bears on said follower pin and advances said flow tube to said second position.
10. The valve according to claim 1 , further including a plurality of powered drive mechanisms, said drive mechanisms including one-way drive clutches and allowing nonfunctioning drive mechanisms to be mechanically decoupled.
11. The valve according to claim 9 wherein the helical groove includes a straight portion substantially parallel to the longitudinal axis of said bore.
12. The valve according to claim 9 wherein the helical groove includes a transverse portion substantially perpendicular to the longitudinal axis of said bore.
13. The valve according to claim 9 , further including means for preventing longitudinal rotation of said flow tube.
14. The valve according to claim 9 , further including an electrically actuable retaining mechanism mounted in said body and actuable between an engaged position in which said retaining mechanism engages said flow tube and prevents axial movement of said flow tube relative to said body and a disengaged position in which said retaining mechanism allows axial movement of said flow tube relative to said body.
15. The valve according to claim 9 , further including a biasing means for urging said flow tube into said first position.
16. A method for controlling fluid flow in a deepwater drilling operation, comprising:
a) providing a tool having a bore therethrough, the tool including a closure element actuable between a closed position in which the closure element closes said bore and an open position in which the closure element allows fluid flow through the bore, the closure element being biased normally closed, the tool further including a flow tube slidably mounted in said bore, the flow tube being actuable between a first position in which the flow tube does not prevent the closure element from being in its normally biased position and a second position in which the flow tube opposes the normal bias of the closure element so as to actuate the closure element to the open position;
b) selectively actuating said flow tube so as to actuate the closure element to the open position.
17. The method according to claim 16 wherein the tool further includes a rotating sleeve and a follower pin extending from the flow tube and engaging a helical groove in said rotating sleeve and wherein the actuating step comprises rotating the sleeve such that engagement of the follower pin in the helical groove advances the flow tube from the first position to the second position.
18. The method according to claim 16 wherein the tool further comprises a releasable locking mechanism and said helical groove includes a longitudinal straight portion such that when the follower pin lies in the longitudinal straight portion of the groove and the locking mechanism is released, the biasing of the closure element causes the flow tube to move to the first position.
19. The method according to claim 18 wherein the locking mechanism is electrically actuated.
20. The method according to claim 16 wherein the flow tube is actuated using electrical power.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/748,515 US20040173362A1 (en) | 2002-12-30 | 2003-12-30 | Electric downhole safety valve |
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Application Number | Priority Date | Filing Date | Title |
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US43707002P | 2002-12-30 | 2002-12-30 | |
US10/748,515 US20040173362A1 (en) | 2002-12-30 | 2003-12-30 | Electric downhole safety valve |
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US20040173362A1 true US20040173362A1 (en) | 2004-09-09 |
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US10/748,515 Abandoned US20040173362A1 (en) | 2002-12-30 | 2003-12-30 | Electric downhole safety valve |
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US (1) | US20040173362A1 (en) |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090139727A1 (en) * | 2007-11-02 | 2009-06-04 | Chevron U.S.A. Inc. | Shape Memory Alloy Actuation |
US20100025045A1 (en) * | 2008-07-29 | 2010-02-04 | Baker Hughes Incorporated | Electric Wireline Insert Safety Valve |
WO2010051402A2 (en) * | 2008-10-31 | 2010-05-06 | Chevron U.S.A. Inc. | Linear actuation system in the form of a ring |
US20100243077A1 (en) * | 2007-07-03 | 2010-09-30 | Vetco Gray Scandinavia As | Sub sea actuator |
US8512417B2 (en) | 2008-11-14 | 2013-08-20 | Dune Sciences, Inc. | Functionalized nanoparticles and methods of forming and using same |
US20140144649A1 (en) * | 2012-11-29 | 2014-05-29 | Chevron U.S.A. Inc. | Electrically- powered surface - controlled subsurface safety valves |
WO2017003632A1 (en) * | 2015-07-02 | 2017-01-05 | Baker Hughes Incorporated | Electrically actuated safety valve and method |
US20170006775A1 (en) * | 2015-07-10 | 2017-01-12 | Mark W. Wyne | Combination blade and cord weed cutter-trimmer head device |
US10920529B2 (en) | 2018-12-13 | 2021-02-16 | Tejas Research & Engineering, Llc | Surface controlled wireline retrievable safety valve |
US20220081993A1 (en) * | 2020-09-16 | 2022-03-17 | Halliburton Energy Services, Inc. | Single-Trip Deployment And Isolation Using Flapper Valve |
US11319773B2 (en) * | 2017-06-06 | 2022-05-03 | Ouro Negro Tecnologias Em Equipamentos Industriais S/A | Fully electric downhole safety tool |
US11761300B2 (en) * | 2018-06-22 | 2023-09-19 | Schlumberger Technology Corporation | Full bore electric flow control valve system |
US20230349262A1 (en) * | 2022-04-29 | 2023-11-02 | Halliburton Energy Services, Inc. | Failsafe safety valve with linear electromechanical actuation |
US11965396B1 (en) | 2022-10-14 | 2024-04-23 | Saudi Arabian Oil Company | Thrust force to operate control valve |
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Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8356792B2 (en) | 2007-07-03 | 2013-01-22 | Vetco Gray Scandinavia As | Sub sea actuator |
US20100243077A1 (en) * | 2007-07-03 | 2010-09-30 | Vetco Gray Scandinavia As | Sub sea actuator |
US7971651B2 (en) | 2007-11-02 | 2011-07-05 | Chevron U.S.A. Inc. | Shape memory alloy actuation |
US20090139727A1 (en) * | 2007-11-02 | 2009-06-04 | Chevron U.S.A. Inc. | Shape Memory Alloy Actuation |
US20100025045A1 (en) * | 2008-07-29 | 2010-02-04 | Baker Hughes Incorporated | Electric Wireline Insert Safety Valve |
WO2010014398A2 (en) * | 2008-07-29 | 2010-02-04 | Baker Hughes Incorporated | Electric wireline insert safety valve |
WO2010014398A3 (en) * | 2008-07-29 | 2010-04-29 | Baker Hughes Incorporated | Electric wireline insert safety valve |
GB2474189B (en) * | 2008-07-29 | 2012-05-02 | Baker Hughes Inc | Electric wireline insert safety valve |
GB2474189A (en) * | 2008-07-29 | 2011-04-06 | Baker Hughes Inc | Electric wireline insert safety valve |
US7967074B2 (en) | 2008-07-29 | 2011-06-28 | Baker Hughes Incorporated | Electric wireline insert safety valve |
WO2010051402A3 (en) * | 2008-10-31 | 2010-07-15 | Chevron U.S.A. Inc. | Linear actuation system in the form of a ring |
US7971652B2 (en) | 2008-10-31 | 2011-07-05 | Chevron U.S.A. Inc. | Linear actuation system in the form of a ring |
US20100108324A1 (en) * | 2008-10-31 | 2010-05-06 | Chevron U.S.A. Inc. | Linear Actuation System in the Form of a Ring |
WO2010051402A2 (en) * | 2008-10-31 | 2010-05-06 | Chevron U.S.A. Inc. | Linear actuation system in the form of a ring |
US8512417B2 (en) | 2008-11-14 | 2013-08-20 | Dune Sciences, Inc. | Functionalized nanoparticles and methods of forming and using same |
US20140144649A1 (en) * | 2012-11-29 | 2014-05-29 | Chevron U.S.A. Inc. | Electrically- powered surface - controlled subsurface safety valves |
US8857522B2 (en) * | 2012-11-29 | 2014-10-14 | Chevron U.S.A., Inc. | Electrically-powered surface-controlled subsurface safety valves |
WO2017003632A1 (en) * | 2015-07-02 | 2017-01-05 | Baker Hughes Incorporated | Electrically actuated safety valve and method |
US10670160B2 (en) | 2015-07-02 | 2020-06-02 | Baker Hughes, A Ge Company, Llc | Electrically actuated safety valve and method |
US10149433B2 (en) * | 2015-07-10 | 2018-12-11 | Combined Manufacturing Inc. | Combination blade and cord weed cutter-trimmer head device |
US20170006775A1 (en) * | 2015-07-10 | 2017-01-12 | Mark W. Wyne | Combination blade and cord weed cutter-trimmer head device |
US11319773B2 (en) * | 2017-06-06 | 2022-05-03 | Ouro Negro Tecnologias Em Equipamentos Industriais S/A | Fully electric downhole safety tool |
US11761300B2 (en) * | 2018-06-22 | 2023-09-19 | Schlumberger Technology Corporation | Full bore electric flow control valve system |
US10920529B2 (en) | 2018-12-13 | 2021-02-16 | Tejas Research & Engineering, Llc | Surface controlled wireline retrievable safety valve |
US20220081993A1 (en) * | 2020-09-16 | 2022-03-17 | Halliburton Energy Services, Inc. | Single-Trip Deployment And Isolation Using Flapper Valve |
US20230349262A1 (en) * | 2022-04-29 | 2023-11-02 | Halliburton Energy Services, Inc. | Failsafe safety valve with linear electromechanical actuation |
US11965396B1 (en) | 2022-10-14 | 2024-04-23 | Saudi Arabian Oil Company | Thrust force to operate control valve |
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Legal Events
Date | Code | Title | Description |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |