US20100300702A1 - Wellbore Shut Off Valve with Hydraulic Actuator System - Google Patents
Wellbore Shut Off Valve with Hydraulic Actuator System Download PDFInfo
- Publication number
- US20100300702A1 US20100300702A1 US12/473,118 US47311809A US2010300702A1 US 20100300702 A1 US20100300702 A1 US 20100300702A1 US 47311809 A US47311809 A US 47311809A US 2010300702 A1 US2010300702 A1 US 2010300702A1
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- US
- United States
- Prior art keywords
- valve
- shut
- valve actuator
- wellbore
- assembly
- 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
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- 239000012530 fluid Substances 0.000 claims description 57
- 238000000034 method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 26
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 125000001475 halogen functional group Chemical group 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000010008 shearing Methods 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/04—Ball valves
Abstract
A wellbore shut-off valve is operably associated with a valve actuator so that the shut-off valve can be selectively moved between open and closed conditions when desired rather than opening and closing occurring automatically as portions of the production assembly are removed or replaced in the wellbore.
Description
- 1. Field of the Invention
- The present invention generally relates to systems and methods for isolating or closing off a wellbore or a portion of a wellbore.
- 2. Description of the Related Art
- During operation of a hydrocarbon production well, it is sometimes necessary to shut off the well or a portion of the wellbore below a particular point. If the well remains live while, for example, a pump is being removed from the production tubing assembly, pressurized fluid can be forced to the surface very quickly, resulting in a dangerous situation at the wellhead and possibly reducing the ability of the well to produce further. Another example of equal importance would involve controlling fluid losses to the formation which could permanently damage the formation. To shut-off the wellbore, a shut-off valve, or barrier valve, can be included in the production tubing assembly.
- The present invention provides a wellbore shut-off valve that is incorporated within a wellbore production string in conjunction with an associated valve actuator device. In a preferred embodiment, the shut-off valve comprises a ball valve which can be moved between open and closed conditions. A currently preferred embodiment for the valve actuator is a stroker tool having a shifting sleeve that can be positively moved between first position, wherein the shut-off valve is moved to the open condition and a second position, wherein the shut-off valve is moved to the closed condition. In a further preferred embodiment, the valve actuator is hydraulically-actuated.
- The shut-off valve and actuator may be made up into a production tubing assembly that is then disposed into a wellbore. Preferably, the shut-off valve is landed in a packer. The shut-off valve can be placed above or below a lower completion packer. When it is necessary to remove a portion of the production tubing string above the shut-off valve, the valve actuator is operated to cause the shut-off valve to close. The upper portions of the production tubing string can be removed by detaching the valve actuator from the shut-off valve and then withdrawing the detached upper portions from the wellbore.
- Thereafter, the production tubing string can be reinserted into the wellbore and reattaching the valve actuator to the shut-off valve. When reattachment occurs, the shut-off valve is not automatically reopened. Because the valve remains closed, wellbore operators are able to make up the tubing hanger arrangement at the surface before opening the shut-off valve. When it is desired to reopen the flowbore of the production string, the valve actuator is actuated to move the shut-off valve back to the open position.
- In another aspect of the invention, operation of the valve actuator may be controlled by a programmable controller that is programmed to coordinate operation of the shut-off valve with another device associated with the well production system. In a preferred embodiment, the controller controls the valve actuator in response to a condition of operation for a fluid pump within the production assembly. When the pump is turned off, the controller detects this condition and commands the valve actuator to close the shut-off valve. The controller can also command the valve actuator to open the shut off valve in connection with the operation of starting or restarting the fluid pump.
- The advantages and other aspects of the invention will be readily appreciated by those of skill in the art and better understood with further reference to the accompanying drawings in which like reference characters designate like or similar elements throughout the several figures of the drawings and wherein:
-
FIG. 1 is a side, partial cross-sectional view of a wellbore having an upper production string assembly being disposed therein. -
FIG. 2 is a side, partial cross-sectional view of the wellbore shown inFIG. 1 , now with the upper production string assembly having been landed and secured to a lower production string assembly in the wellbore. -
FIG. 3 is a side, partial cross-sectional view of the wellbore shown inFIGS. 1 and 2 , now with a portion of the upper completion assembly being removed from the wellbore. -
FIG. 4 is a side, one-quarter cross-sectional view of a portion of an exemplary valve actuator in accordance with the present invention, in a first position, -
FIG. 5 is a side, one-quarter cross-sectional view of the exemplary valve actuator portion ofFIG. 4 , now in a second position. -
FIG. 6 is a cross-sectional view taken along lines 6-6 inFIG. 4 . -
FIG. 7 is a side, cross-sectional view of portions of an exemplary shut-off valve in accordance with the present invention, with the valve in a closed condition. -
FIG. 8 is a side, cross-sectional view of the portions of the exemplary shut-off valve shown inFIG. 7 , now with the valve in an open condition. -
FIG. 9 is a schematic representation of an arrangement wherein a controller controls operation of the valve actuator based upon the operating condition of an electrical submersible pump within the production assembly. - Referring first to
FIGS. 1 and 2 , there is depicted anexemplary wellbore 10 which has been drilled into theearth 12 and is lined withcasing 14 which will extend upwardly toward the surface of thewellbore 10. Thecasing 14 defines acentral flowbore 16. Thewellbore 10 contains an exemplary production string assembly which will be used to illustrate the invention. It is noted that, in this example, the section of thewellbore 10 which is depicted is representative of an upper pump-assisted completion within thewellbore 10 and that one or more additional completions may be located below the wellbore portion that is shown. As a result, a lower portion ofproduction tubing string 18 is shown extending downwardly within theflowbore 16 fromlower packer 20. Alanding anchor 22 extends axially upwardly from thepacker 20. Collectively, the lower productiontubing string portion 18 and elements suspended below it, as well as thepacker 20 andanchor 22 may be thought of as a lower completion, generally designated as 24. -
FIG. 1 illustrates an upper completion, generally designated as 26, being disposed into theflowbore 16 in the direction of arrow 28. InFIG. 2 , theupper completion 26 has been landed within theanchor 22 of thelower completion 24. Theupper completion 26 is run in on an upper string of production tubing 30 (seeFIG. 2 ) and defines an axial flowbore 32 along its length so that hydrocarbon production fluids may be transmitted to the surface of thewellbore 10. - Beginning at its lower end and moving upwardly, the exemplary
upper completion 26 includes a wellbore shut-offvalve 34 with a downwardly extendinglatching portion 36. Thelatching portion 36 may take the form of collets or other devices which permit it to be locked together with theanchor 22. The shut-offvalve 34 preferably takes the form of a ball valve in which a ball having a flowbore is rotated within a flowbore to selectively block and unblock the flowbore 32. The ball is rotated by a shifting member that is biased toward a fail safe position by a fluid spring or mechanical spring. A suitable ball-type shut-off valve for use as the shut-offvalve 34 is the Halo Barrier Valve, which is available commercially from Baker Oil Tools of Houston, Tex. InFIG. 1 , the shut-offvalve 34 is shown in a closed position since theball member 38 is shown to be rotated so that theflow path 40 formed within is oriented at approximately 90 degrees from the axis of the flowbore 32 so that fluid cannot pass through the shut-offvalve 34. InFIG. 2 , thevalve 34 is shown in an open condition such that theflowbore 40 of theball member 38 is aligned with the flowbore 32 such that fluid may pass through thevalve 34. - The shut-off
valve 34 is operably associated with avalve actuator 42. Thevalve actuator 42 is preferably operated from the surface of thewellbore 10 by hydraulic close andopen lines valve 34, operation of theactuator 42 will cause thevalve 34 to be moved between its open and closed conditions. A suitable actuator for use as thevalve actuator 42 is the hydraulic Stroker tool available commercially from Baker Oil Tools of Houston, Tex. Portions of theactuator 42 are depicted in greater detail inFIGS. 4-6 and will be described in greater detail shortly. - Also included in the
upper completion 26 is a shear out safety joint 48 through which the close andopen lines upper completion 26. A perforated pup joint 54 is incorporated into theupper completion 26 above the safety joint 48 and immediately below an electrical submersible pump (ESP) 56. An ESP packer 58 is located above theESP 56 and, inFIG. 2 , is shown set against theflowbore 16 to secure theESP 56 in place within theflowbore 16. An electrical power cable 60 extends from the surface of thewellbore 10 downwardly to theESP 56. A seating nipple 62 is used to affix the ESP packer 58 to theESP 56. An additional safety valve 64 may be incorporated into theupper completion 26. -
FIGS. 4-6 illustrate portions of anexemplary valve actuator 42. Thevalve actuator 42 basically includes an outer, generally cylindrical housing, generally indicated at 66. Aninterior sleeve 68 is located radially within thehousing 66 and is axially moveable with respect to thehousing 66. Aradial space 70 is defined between thehousing 66 and thesleeve 68. A centralannular fluid seal 72 resides within thespace 70 and divides thespace 70 into upper and lowerfluid chambers upper chamber 74 is defined axially by thecentral seal 72 at its lower end and by anupper fluid seal 78 at its upper end. Thelower fluid chamber 76 is defined axially by thecentral seal 72 at its upper end and by alower fluid seal 80 at its lower end. Afirst fluid port 82 is disposed through thehousing 66 and is interconnected with theclose line 44. The firstfluid port 82 permits fluid communication between theclose line 44 and thelower fluid chamber 76. As hydraulic fluid is flowed into thelower fluid chamber 76 from theclose line 44, fluid pressure is exerted upon thelower fluid seal 80 and urges theinterior sleeve 68 downwardly to the position illustrated inFIG. 5 , expanding thelower fluid chamber 76. Asecond fluid port 84 is also disposed through thehousing 66 and is interconnected with theopen line 46. Thesecond fluid port 84 provides fluid communication between theopen line 46 and theupper fluid chamber 74. As hydraulic fluid is flowed into theupper fluid chamber 74, fluid pressure is exerted upon theupper fluid seal 78 and urges theinterior sleeve 68 upwardly to the position depicted inFIG. 4 , expanding theupper fluid chamber 74. - The lower end of the
interior sleeve 68 presents a shifting member 86 (seeFIGS. 2 , 7 and 8). The shiftingmember 86 is shaped and sized to engage operating portions of the shut-offvalve 34, as will be described shortly. -
FIG. 4 depicts thevalve actuator 42 in a first position wherein thesleeve 68 and shiftingmember 86 are axially raised with respect to the surroundinghousing 66 of thevalve actuator 42.FIG. 5 illustrates thevalve actuator 42 in a second position wherein thesleeve 68 and shiftingmember 86 are axially lowered with respect to thehousing 66.FIGS. 7 and 8 show the shiftingmember 86 reversibly connected with the shut-offvalve 34. As can be seen there, the shut-offvalve 34 includes an outer housing, indicated at 88 which retains theball member 38. Asleeve assembly 90 is axially moveable within thehousing 88 and, when moved axially, shifts theball member 38 between the closed condition shown inFIG. 7 and the open condition shown inFIG. 8 . The upper end of thesleeve assembly 90 presents a number of inwardly directedcollet fingers 92. Thecollet fingers 92 are shaped and sized to snap into engagement withengagement portions 94 of the shiftingmember 86. - In operation, the
upper completion 26 is run into thewellbore 10, as depicted inFIG. 1 , and then landed in theanchor 22 so that theupper completion 26 is secured to thelower completion 24. During run-in, the shut-offvalve 34 is in the closed position. Upon being landed in theanchor 22, thevalve actuator 42 is actuated to move the shut-offvalve 34 to the open condition, as depicted inFIG. 2 . In the open condition, production fluid may be flowed upwardly from thelower completion 24 through the flowbore 32 of theupper completion 26. - During production, it may be desirable to shut-off the
wellbore 10 and remove theupper completion assembly 26. One reason for doing this might be to service theESP pump 56. To remove theupper completion assembly 26, thevalve actuator 42 is operated to cause the shut-offvalve 34 to move to its closed condition, thereby blocking fluid flow upwardly through the flowbore 32. Fluid flow is also prevented going down thewellbore 10, preventing fluid losses to the surrounding formation. Hydraulic fluid is flowed through theclose line 44 and into theupper fluid chamber 74 to move the shiftingmember 86 upwardly, thereby closing thevalve 34. Then thevalve actuator 42 is detached from the shut-offvalve 34 by detaching theengagement portions 94 of the shiftingmember 86 from thecollet fingers 92 of thesleeve assembly 90. Theupper completion assembly 26 may be withdrawn from thewellbore 10. At this point, theESP 56 may be serviced or replaced and other maintenance or repairs may be made to theupper completion 26. - In order to reestablish production from the
wellbore 10, theupper completion 26 is run into thewellbore 10 and thevalve actuator 42 is then reattached to the shut-offvalve 34 by reattaching theengagement portions 94 of the shiftingmember 86 with thecollet fingers 92 of the sleeve assembly. When this occurs, the shut-offvalve 34 will remain in the closed condition. Well operators will be able to make up the tubing hanger arrangement at the surface before opening the shut-offvalve 34. When it is desired to reestablish production, hydraulic fluid is flowed through theopen line 46 to thevalve actuator 42 to cause the shut-offvalve 34 to be moved to its open condition (FIG. 8 ). TheESP 56 may be restarted to cause production to occur once more. - In a further preferred aspect of the invention, operation of the
valve actuator 42 is responsive to the condition of another device within theupper completion assembly 26. In one exemplary embodiment, thevalve actuator 42 is operated based upon the operating condition of theESP pump 56.FIG. 9 is a schematic representation of such a control scheme wherein acontroller 94 is interconnected with theESP 56 and afluid pump 96. Thefluid pump 96 is typically surface-based and provides hydraulic fluid through the close andopen lines valve actuator 42. Thecontroller 94 may be a programmable processor or general purpose digital processing system, such as a personal computer of a type known in the art with suitable software or code for conducting the operations described herein. Thecontroller 94 is equipped with one or more sensors, indicated schematically at 98, which are capable of detecting whether theESP 56 is on or off.Control line 100 extends from thecontroller 94 to thepump 96. According to an exemplary control scheme using thecontroller 94, thecontroller 94 detects whether theESP 56 is operating to pump fluid through theupper completion 26 or, alternatively, if theESP 56 is not operating. If thecontroller 94 detects that theESP 56 is not operating, it commands thepump 96 to flow fluid through theclose line 44 in order to move the shut-offvalve 34 to its closed condition. Therefore, theupper completion 26 may be removed after the operation of turning theESP 56 off. Also according to the exemplary control scheme, thecontroller 94 will command thepump 96 to flow fluid through theopen line 46 when it detects that theESP 56 is operating or is being started up. This mode of operation will help prevent fluid from being lost to the surrounding subterranean formation, thus helping to prevent formation damage. By reopening the shut-offvalve 34 prior to or in conjunction with starting of theESP 56, one can ensure that there will be a column of fluid within the flowbore 32 of theupper completion 26 when theESP 56 starts operating, thereby reducing operating stress on theESP 56. - It can be seen that the shut-off
valve 34 and thevalve actuator 42 collectively provide a controllable shut-off valve assembly which can be used to selectively open and close off thewellbore 10 in accordance with a user's desire or a predetermined programmed scheme viacontroller 94. Optionally, a shut-off valve assembly constructed in accordance with the present invention may also include afluid pump 96 and acontroller 94 for operation of thefluid pump 96 in response to the condition of another component with theupper completion 26. - Those of skill in the art will recognize that numerous modifications and changes may be made to the exemplary designs and embodiments described herein and that the invention is limited only by the claims that follow and any equivalents thereof.
Claims (15)
1. A shut-off valve assembly for use in selectively closing off a section of wellbore to fluid flow, the assembly comprising:
a shut-off valve incorporated within a completion string within the wellbore, the shut-off valve being moveable between an open condition wherein fluid may flow through the completion string, and a closed condition, wherein fluid flow through the completion string is blocked; and
a valve actuator incorporated within the completion string and associated with the shut-off valve, the valve actuator operating the shut-off valve between its open and closed conditions.
2. The shut-off valve assembly of claim 1 wherein the shut-off valve comprises a ball valve.
3. The shut-off valve assembly of claim 1 wherein the valve actuator is hydraulically actuated.
4. The shut-off valve assembly of claim 1 wherein the valve actuator further comprises:
a housing;
a sleeve moveably disposed within the housing; and
a shifting portion affixed to the sleeve, the shifting portion being operable to move the shut-off valve between open and closed conditions upon movement of the sleeve with respect to the housing.
5. The shut-off valve assembly of claim 1 further comprising a programmable controller operably associated with the valve actuator to cause the valve actuator to operate the shut-off valve between open and closed conditions in accordance with a predetermined scheme.
6. The shut-off valve assembly of claim 5 wherein the controller is operably associated with the valve actuator by control of a fluid pump supplying hydraulic control fluid to the valve actuator.
7. A shut-off valve assembly for use in selectively closing off a section of wellbore to fluid flow, the assembly comprising:
a shut-off ball valve incorporated within a completion string within the wellbore, the shut-off ball valve being moveable between an open condition wherein fluid may flow through the completion string, and a closed condition, wherein fluid flow through the completion string is blocked; and
a valve actuator incorporated within the completion string and associated with the shut-off valve, the valve actuator operating the shut-off valve between its open and closed conditions.
8. The shut-off valve assembly of claim 7 wherein the valve actuator further comprises:
a housing;
a sleeve moveably disposed within the housing; and
a shifting portion affixed to the sleeve, the shifting portion being operable to move the shut-off valve between open and closed conditions upon movement of the sleeve with respect to the housing.
9. The shut-off valve assembly of claim 7 wherein the valve actuator is hydraulically actuated.
10. The shut-off valve assembly of claim 7 further comprising a programmable controller operably associated with the valve actuator to cause the valve actuator to operate the shut-off valve between open and closed conditions in accordance with a predetermined scheme.
11. The shut-off valve assembly of claim 10 wherein the controller is operably associated with the valve actuator by control of a fluid pump supplying hydraulic control fluid to the valve actuator.
12. A method of selectively shutting off a wellbore so that an upper portion of a completion assembly within the wellbore may be removed, the method comprising the steps of:
operably associating a wellbore shut-off valve which is operable between open and closed conditions with a valve actuator that controls movement of the valve between open and closed conditions;
operating the valve actuator to move the shut-off valve to the closed condition; and
detaching and removing the upper completion assembly portion from a lower completion portion within the wellbore after the shut-off valve has been closed.
13. The method of claim 12 further comprising the steps of:
reattaching the upper completion portion to the lower completion portion; and
after reattaching the upper completion portion to the lower completion portion, operating the valve actuator to move the shut-off valve to the open condition.
14. The method of claim 12 wherein the step of operating the valve actuator to move the shut-off valve to the closed condition is conducted by a programmable controller.
15. The method of claim 13 wherein the step of operating the valve actuator to move the shut-off valve to the open condition is conducted by a programmable controller.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/473,118 US20100300702A1 (en) | 2009-05-27 | 2009-05-27 | Wellbore Shut Off Valve with Hydraulic Actuator System |
PCT/US2010/035757 WO2010138413A2 (en) | 2009-05-27 | 2010-05-21 | Wellbore shut off valve with hydraulic actuator system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/473,118 US20100300702A1 (en) | 2009-05-27 | 2009-05-27 | Wellbore Shut Off Valve with Hydraulic Actuator System |
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US20100300702A1 true US20100300702A1 (en) | 2010-12-02 |
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ID=43218918
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US12/473,118 Abandoned US20100300702A1 (en) | 2009-05-27 | 2009-05-27 | Wellbore Shut Off Valve with Hydraulic Actuator System |
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US (1) | US20100300702A1 (en) |
WO (1) | WO2010138413A2 (en) |
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WO2010138413A2 (en) | 2010-12-02 |
WO2010138413A3 (en) | 2011-03-03 |
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Legal Events
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AS | Assignment |
Owner name: BAKER HUGHES INCORPORATED, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ANDREWS, THAD D.;MYERLEY, THOMAS S.;DESAI, MONA I.;AND OTHERS;SIGNING DATES FROM 20090611 TO 20090803;REEL/FRAME:023041/0397 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |