US20150233220A1 - Gas lift valve - Google Patents
Gas lift valve Download PDFInfo
- Publication number
- US20150233220A1 US20150233220A1 US14/426,637 US201314426637A US2015233220A1 US 20150233220 A1 US20150233220 A1 US 20150233220A1 US 201314426637 A US201314426637 A US 201314426637A US 2015233220 A1 US2015233220 A1 US 2015233220A1
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- United States
- Prior art keywords
- valve
- gas
- valve element
- gas lift
- spring
- 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.)
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- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 11
- 230000003628 erosive effect Effects 0.000 claims description 4
- 238000004401 flow injection analysis Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 17
- 238000004891 communication Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/20—Making machine elements valve parts
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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
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
Abstract
A gas lift valve is provided with increased longevity and reliability for preventing backflow. A wide cylindrical sliding member stabilizes axial movement of a valve element in the gas lift valve. A wide spring around the sliding member biases the valve element toward closure during back flow. The spring is physically supported and guided by the sliding member and protected from gas flow injection by the same sliding member. A one-piece poppet version of the valve element provides a consistent closing seal, and the sliding member protects the valve seat and poppet from full force of an injected gas. A dart version of the valve element includes a hexagonal race for movement of the sliding member, which prevents rotational wear of components and provides a straight flow path for the injection gas with no sharp transitions to wear and no sharp angles to erode.
Description
- Gas lift is a process in which a gas is injected from the annulus of a well into the production tubing of the well, to lower the density of oil being recovered, making the fluid easier to lift. “Annulus” as applied to a well casing refers to the space, lumen, or void around the outside of a central pipe within a larger pipe, tubing, or casing that immediately surrounds the central pipe. An annulus is the space between pipes when one pipe is inserted into another pipe. The injected gas aerates to lighten the well fluid for flow to the surface. Gas lift valves control the flow of gas during either an intermittent or continuous-flow gas lift operation. A principle of gas lift operation is differential pressure control with a variable orifice size to further constrain the maximum flow rate of gas. By incorporating a hydrostatic pressure chamber that can be charged with different pressures, injection pressure-operated gas lift valves and unloading valves can be configured so that an upper valve in the production string opens before a lower valve opens, even though both valves receive the injection gas from the same annulus. A gas lift valve is either fully open or fully closed, there is no intermediate valve state. Gas lift valves are often retrievable using a kick-off tool in the well. Back check is a critical component for gas lift valves to prevent the well fluid from recirculating back to the annulus of the casing.
- An example gas lift valve includes a first port for receiving a gas from a well annulus, a second port for transferring the gas to a well production tube, a valve seat, a poppet valve element for allowing a one-way flow of the gas past the valve seat and for preventing a back flow of the gas, a sliding barrel attached to the poppet valve element to maintain a sealing surface of the poppet valve element in alignment with a sealing surface of the valve seat, and a spring coiled around the outside diameter of the sliding barrel to bias the poppet valve element in a closed position against the valve seat. A one-piece poppet version of the valve element provides a consistent closing seal. A dart version of the valve element includes a hexagonal race to prevent rotational wear of components and a straight flow path for the injection gas with no sharp transitions and angles to wear and erode. An example method includes constructing a gas lift valve with a wide cylindrical sliding member to reliably seat a valve element and biasing the valve element toward a closed state with a wide spring around the wide cylindrical sliding member. This summary section is not intended to give a full description of the example gas lift valves. A detailed description with example embodiments follows.
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FIG. 1 is a diagram of an example gas lift operation using improved gas lift valves. -
FIG. 2 is a diagram of an example gas lift valve assembly. -
FIG. 3 is a diagram of a first embodiment of an example gas lift valve. -
FIG. 4 is a diagram of a second embodiment of an example gas lift valve. -
FIG. 5 is a diagram showing a cross-sectional view of the example gas lift valve ofFIG. 4 . -
FIG. 6 is a flow diagram of an example method of constructing a gas lift valve. - This disclosure describes gas lift valves with improved features. For context,
FIG. 1 depicts agas lift system 100 that includes aproduction tubing 140 that extends into a wellbore. For purposes of gas injection, thesystem 100 includes agas compressor 120 that is located at the surface of the well to pressurize gas to be communicated to anannulus 150 of the well. To control the communication of gas between theannulus 150 and acentral passageway 170 of theproduction tubing 140, thesystem 100 may include several side pocket gas lift mandrels 160 (examplegas lift mandrels gas lift mandrels 160 includes an associated gas lift valve 180 (such as examplegas lift valves annulus 150 to thecentral passageway 170. Near the surface of the well, one or more of thegas lift valves 180 may be unloading valves. An unloading gas lift valve opens when the annulus pressure exceeds the production tubing pressure by a certain threshold, a feature that aids in pressurizing the annulus below the valve before the valve opens. Othergas lift valves 180 are located farther below the surface of the well and may not have an opening pressure threshold. - Each
gas lift valve 180 may contain a check valve element that opens to allow fluid flow (gas) from theannulus 150 into theproduction tubing 140 and closes when the fluid would otherwise back flow in the opposite direction. For example, theproduction tubing 140 may be pressurized for purposes of setting a packer, actuating a tool, performing a pressure test, and so forth. Thus, when the pressure in theproduction tubing 140 exceeds the annulus pressure, the valve element is closed to ideally form a seal to prevent flow from thetubing 140 to theannulus 150. However, it is possible that this seal may leak, and if leakage does occur, well operations that rely on production tubing pressure may not be able to be completed or performed. The leakage may require an intervention, which is costly, especially for a subsea well. -
FIG. 2 shows a gaslift valve assembly 200 in accordance with some embodiments of the example gas lift valves. In general, the gaslift valve assembly 200 includes an examplegas lift valve 180 that includes a valve element (described further below) to control fluid communication between theannulus 150 of the well and thecentral passageway 170 of theproduction tubing 140. The examplegas lift valve 180 resides inside alongitudinal passageway 204 of amandrel 206. In addition to thelongitudinal passageway 204, themandrel 206 includes a separatelongitudinal passageway 208 that has a larger cross-section thanpassageway 204, is eccentric topassageway 204, and forms part of the production tubing string (140). As depicted inFIG. 2 , thelongitudinal passageways mandrel 206 includes at least oneradial port 210 to establish communication between thelongitudinal passageways radial port 212 to establish fluid communication between thelongitudinal passageway 204 and theannulus 150 of the well that surrounds themandrel 206. - In general, the
gas lift valve 180 is configured to control fluid communication between thelongitudinal passageway 208 and theannulus 150 of the well. In this regard, thegas lift valve 180 includes anupper seal 214 and a lower 216 seal (for example, o-ring seals, v-ring seals, or a combination) that circumscribe the outer surface housing of the examplegas lift valve 180 to form a sealed region that containsradial ports 218 of the examplegas lift valve 180 and theradial ports 212 of themandrel 206. One or more lower ports 220 (located near alower end 222 of the longitudinal passageway 204) of thegas lift valve 180 are located below thelower seal 216 and are in fluid communication with theradial ports 210 near thelower end 222. Thelongitudinal passageway 204 is sealed off (not shown) to complete a pocket to receive the examplegas lift valve 180. In this arrangement, the examplegas lift valve 180 is positioned to control fluid communication between the radial ports 210 (i.e., the central passageway of the production tubing string 140) and radial ports 212 (of themandrel 206, in fluid communication with the annulus 150). During operation, the examplegas lift valve 180 establishes a one-way communication path from theannulus 150 to thecentral passageway 170 of theproduction tubing 140. Thus, when enabled, thegas lift valve 180 permits gas flow from theannulus 150 to theproduction tubing 140 and ideally prevents flow in the opposite direction. - The
gas lift valve 180 may be installed or removed by a wireline operation in the well. Thus, in accordance with some embodiments, the example gaslift valve assembly 200 may include a latch 224 (located near anupper end 226 of the mandrel 206) that may be engaged with a wireline tool (not shown) for installing the examplegas lift valve 180 in themandrel 206 or removing the examplegas lift valve 180 from themandrel 206. - The example gas
lift valve assembly 200 may be used in a subterranean well or in a subsea well, depending on a particular embodiment. - In an implementation, the example
gas lift valve 180 has a general design that is depicted inFIG. 3 .Radial ports 218 of the examplegas lift valve 180 may be formed in atubular housing 302 of the examplegas lift valve 180. Thetubular housing 302 may be connected to an upperconcentric housing section 304 of thegas lift valve 180 that extends to the latch 224 (not shown inFIG. 3 ). - The
housing 302 includes aninterior space 305 for receiving gas that flows in from theradial ports 218. Injection gas that enters theradial ports 218 flows into theinterior space 305 and through anorifice 306, which may be connected to the lower end of the housing 70. Theorifice 306 may by cylindrical, square-edged, or streamlined for venture effects, for example. The housing around theorifice 306 may be partially circumscribed by the lower end of thehousing 302 and may be sealed to thehousing 302 with one ormore seals 308, such as o-rings, for example. The housing of theorifice 306 may extend inside an upper end of alower housing 310 that is concentric with thehousing 302 and extends further downhole. Thehousings more seals 312, such as o-rings. As also depicted inFIG. 3 , the lower seal 216 (formed from one or more v-type seals, o-rings, etc.) may circumscribe the outer surface of thehousing 310 in some embodiments. Theorifice 306 is in communication with alower passageway 314 that extends through thehousing 310. - Poppet Back Check Valve Embodiment
- In an implementation, the lower end of the
housing 310 forms avalve seat 316, a seat that is opened and closed (for purposes of controlling the one-way flow through the gas lift valve 180) via avalve element 322 of acheck valve assembly 318. Thecheck valve assembly 318 may be spring-loaded using, for example,spring 320 in a guided spring assembly. Thecheck valve assembly 318 may be anchored or secured via a socket-type connection to a movable, sliding, hollow cylindrical member, such as a piston orbarrel 324 surrounded by the inside diameter of coils of thespring 320. Thecheck valve assembly 318 moves as a unit depending on the injected gas pressure, allowing pressurized gas to flow through the valve end of thebarrel 324 in a controlled manner. - In an implementation, a poppet-shaped version of the valve element 322 (“poppet valve element” 322) allows gas flow, or closes off gas flow as the case may be, controlling fluid communication through the
valve seat 316. Thecheck valve assembly 318 exerts an “upward” bias force (towards the surface, i.e., toward closure of the examplegas lift valve 180 against back pressure) on thevalve element 322 for biasing thevalve element 322 to close off fluid communication through thevalve seat 316. - The particular mushroom-like geometry of a poppet-shaped disk, when used as the
valve element 322, provides a concerted valve closure all the way around the sealing perimeter of thepoppet valve element 322 when thepoppet valve element 322 shuts during pressure scenarios that would cause backflow. In an implementation, a one-piecepoppet valve element 322 ensures alignment of the seal surface when it closes. - Besides this consistent evenness of the closing seal due to the poppet geometry, the
poppet valve element 322 also provides reliability in the seal that is created between thepoppet valve element 322 and thevalve seat 316. The poppet-shapedvalve element 322, as guided by the piston orbarrel 324 that supports thespring 320, moves smoothly and reliably in one axial direction for opening and closing. The relatively large bore of thebarrel 412 located just inside the coils of thespring 406 provides strength and smoothness to the axial movement of thedart valve element 404, and removes unnecessary play, as compared with conventional back check valves that use a spindly support member for movement of a conventional valve element. - In an implementation, the cross-sectional diameter of the
barrel 324 may be substantially the same diameter as that of thepoppet valve element 322 to maintain a sealing surface of thepoppet valve element 322 in good or perfect parallel-planar alignment with a sealing surface of thevalve seat 316. Thus, the geometry of thecheck valve assembly 318 affords thepoppet valve element 322 reliable and smooth movement, so that thepoppet valve element 322 makes a consistent leak-proof seal. Thus, thepoppet valve element 322 snaps shut against thevalve seat 316 in consistent alignment making a quick and reliable seal when the pressure in theproduction tubing 140 becomes greater than the pressure in theannulus 150. - When, however, the annulus pressure is sufficient (relative to the production tubing pressure) to exert a force on the
poppet valve element 322 to overcome the bias of thespring 320, then thepoppet valve element 322 retracts (opens downward) to permit gas fluid to flow from theannulus 150 into theproduction tubing 140 to effect gas lift. - The lower end of the
lower housing 310 may be sealed via an o-ring 328 for example, to a nose housing or endhousing 326 that extends further downward toward the lower port(s) 220 of the examplegas lift valve 180. Aninterior space 330 inside theend housing 326 is in communication with the production tubing side (140 and 170) of the examplegas lift valve 180 and receives the injected gas via theannulus 150 that opens thecheck valve assembly 318 and flows through thevalve seat 316. - An example
gas lift valve 180 that includes thepoppet valve element 322 provides several other advantages. Awide spring 320 can be used and the inside diameter (ID) of thespring 320 can be disposed around and guided by the piston orbarrel 324, as shown. This arrangement provides steady and reliable movement of thepoppet valve element 322 as compared with conventional spring-loaded valve elements that either rely on an unsupported spring or rely on a narrow spring that imparts too much play in the side-to-side movement of a conventional valve element. InFIG. 3 , thespring 320 is also protected from the flow stream, adding to longevity and reliable function of thespring 320. The design and geometry of the examplegas lift valve 180 also avoids direct high speed flow past the sealing surface, which can provide a valve closure for preventing backflow that is more sensitive to smaller backflow pressures. In an implementation, the movement of the openpoppet valve element 322 is stopped by thepoppet valve element 322 itself contacting the nose housing or endhousing 326 of the examplegas lift valve 180, as compared with conventional techniques of having movement limited by other components attached to a valve element, which could cause the valve element to stick at an open position. - Ideally, fluid cannot flow from the production tubing side of the
check valve assembly 318 to the annulus side, because of thepoppet valve element 322 closing and making a seal against thevalve seat 316. - Hex Dart Back Check Valve Embodiment
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FIG. 4 shows an example hex dartgas lift valve 402, which includes an example valve race 502 (FIG. 5 ) that has a hexagonal cross-section, and includes a dart style back check valve element 404 (“dart valve element” 404). This example embodiment of agas lift valve 402 provides several advantages, including a gas flow path that is relatively free from sharp angular transitions, to reduce wear and increase longevity. The hexagonal geometry of the hex dartgas lift valve 402 counteracts erosion at sharp corners, especially when some impurities or abrasives also flow through the valve components with the injected gas. The hex dartgas lift valve 402 uses aspring 406 that is fully guided on its inside diameter (ID) for stability. The hex-shaped race 502 (FIG. 5 ) of the hex dartgas lift valve 402 can also prevent rotation of thedart valve element 404 and connected components (and thus prevent valve sticking) caused by high velocity gas flow. - In
FIG. 4 , alower housing 408 of the examplegas lift valve 402 provides the structure for avalve seat 410. Thevalve seat 410 opens or closes for controlling one-way flow through the examplegas lift valve 402 via thedart valve element 404. A piston, hollow cylindrical member, orbarrel 412 may be spring-loaded using, for example,spring 406 around the outside diameter of thebarrel 412 in a guided spring assembly. Thedart valve element 404 may be anchored or secured via a socket-type connection 414 to the piston orbarrel 412 that is surrounded by the inside diameter of thespring 406. - The
dart valve element 404,connector 414, andbarrel 412 move as a unit to open against the expansive bias of thespring 406, which is set to keep the valve closed, opening when injected gas pressure overcomes the force of thespring 406. Orifice openings near theconnector 414 may allow control of the amount of pressurized gas that can flow through thevalve seat 410 at a given time, thereby adding control and sensitivity to the valve. - The
dart valve element 404 is guided in its movement by thebarrel 412 that stabilizes and guides thespring 406. The relatively large bore of thebarrel 412 located just inside the coils of thespring 406 provides strength and smoothness to the axial movement of thedart valve element 404, and removes unnecessary play, as compared with conventional back check valves that use a spindly support member for movement of a conventional valve element. In an implementation, the diameter of thebarrel 412 may be substantially the same diameter as that of thedart valve element 404. The relativelywide spring 406 and the geometry of thehex race 502 andwide barrel 412 member affords thedart valve element 404 reliable and smooth movement, so that thedart valve element 404 makes a consistent leak-proof seal. Thedart valve element 404 shuts against thevalve seat 410 in consistent alignment making a reliable seal when the pressure in theproduction tubing 140 becomes greater than the pressure in theannulus 150, resulting in a potential back flow condition. - When the annulus pressure is sufficient (relative to the production tubing pressure) to exert a force on the
dart valve element 404 to overcome the bias of thespring 406, then thedart valve element 404 is pushed back (opens downward) to permit gas fluid to flow from theannulus 150 into theproduction tubing 140 to effect gas lift. - The lower end of the
lower housing 408 may be sealed via an o-ring 416 for example, to a nose housing or endhousing 418 that extends further downward toward the lower port(s) 420 of the example hex dartgas lift valve 402. Aninterior space 422 inside theend housing 418 is in communication with the production tubing side (140 and 170) of the example hex dartgas lift valve 402 and receives the injected gas via theannulus 150 that opens thedart valve element 404 and flows through thevalve seat 410. -
FIG. 5 shows an example cross-section of ahexagonal race 502 of the hex dartgas lift valve 402, as viewed from the plane inFIG. 4 designated (in 2D) by line C-C. Depending on implementation, part of thebarrel 412 may be hexagonal and ride in thehexagonal race 502, or in some implementations theentire barrel 412 may have a hexagonal outside sliding surface, or in still other implementations, the entire valve element assembly, including thedart valve element 404 may have hexagonal outer presentations. Thehexagonal race 502 prevents rotation of thedart valve element 404 and associated components, and thus prevents extra surface wear and potential valve sticking that can be caused by high velocity gas flow. -
FIG. 6 is a flow diagram of anexample method 600 of constructing a gas lift valve. In the flow diagram the individual operations are shown as blocks. - At
block 602, a gas lift valve is constructed to include a wide cylindrical sliding member to reliably seat a valve element. The wide cylindrical sliding member, or barrel, is attached to the valve element. Because the barrel moves within a large bore, the barrel has very stable movement in an axial direction with very little play in other movement directions. This assures a strong and correctly aligned seal mating between the valve element and the valve seat. - At
block 604, the valve element is biased toward a closed state with a wide spring around the wide cylindrical sliding member. The wide spring is both supported by the wide cylindrical sliding member and protected from the gas being injected by the wide cylindrical sliding member. - The wide cylindrical sliding member and the spring may have a cross-sectional diameter substantially the same as a largest diameter of the valve element in order to maintain a sealing interface of the valve element and a valve seat in a parallel-planar alignment with each other with very little deviation to a side. The wide cylindrical sliding member can also protect the valve element and a valve seat from full force of a gas injection flow.
- A poppet valve element connected to the wide cylindrical sliding member reliably closes the gas lift valve during a back flow condition. Alternatively, a dart valve element in the gas lift valve prevents a back flow condition and when used with a hexagonal race or bore for the wide cylindrical sliding member, rotational wear of the valve components caused by a high velocity gas flow can be prevented. The hexagonal race also provides a flow path for the injected gas that is free from sharp angular transitions counteracts erosion at sharp corners.
- Conclusion
- Although only a few example embodiments have been described in detail above, those skilled in the art will readily appreciate that many modifications are possible in the example embodiments without materially departing from the subject matter. Accordingly, all such modifications are intended to be included within the scope of this disclosure as defined in the following claims. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents, but also equivalent structures. It is the express intention of the applicant not to invoke 35 U.S.C. §112, paragraph 6 for any limitations of any of the claims herein, except for those in which the claim expressly uses the words ‘means for’ together with an associated function.
Claims (20)
1. A gas lift valve, comprising:
a first port for receiving a gas from a well annulus;
a second port for transferring the gas to a well production tube;
a valve seat;
a poppet valve element for allowing a one-way flow of the gas past the valve seat and for preventing a back flow of the gas;
a sliding barrel attached to the poppet valve element to maintain a sealing surface of the poppet valve element in alignment with a sealing surface of the valve seat; and
a spring coiled around the outside diameter of the sliding barrel to bias the poppet valve element in a closed position against the valve seat.
2. The gas lift valve of claim 1 , wherein the sliding barrel and the spring have a wide cross-sectional diameter substantially the same as a diameter of the poppet valve element to maintain a sealing interface of the poppet valve element and the valve seat in parallel-planar alignment with each other.
3. The gas lift valve of claim 1 , wherein the poppet valve element comprises a one-piece member for alignment of a sealing surface of the poppet valve element with a sealing surface of the valve seat.
4. The gas lift valve of claim 1 , wherein the spring is protected from a main flow of the gas by the barrel.
5. The gas lift valve of claim 1 , wherein a sealing interface between the poppet valve element and the valve seat is protected from a direct high speed flow of the gas by at least one valve component.
6. The gas lift valve of claim 1 , wherein a maximum open state of the poppet valve element is determined by the poppet valve element contacting an end housing of the gas lift valve.
7. A gas lift valve, comprising:
a first port for receiving a gas from a well annulus;
a second port for transferring the gas to a well production tube;
a valve seat;
a dart valve element for allowing a one-way flow of the gas past the valve seat and for preventing a back flow of the gas;
a sliding barrel attached to the dart valve element to maintain a sealing surface of the dart valve element in alignment with a sealing surface of the valve seat;
a spring coiled around the outside perimeter of the sliding barrel to bias the poppet valve element in a closed position against the valve seat; and
a race of hexagonal cross-section for a movement of the sliding barrel.
8. The gas lift valve of claim 7 , further comprising a flow path for gas substantially free from sharp angular transitions.
9. The gas lift valve of claim 7 , wherein a hex dart configuration counteracts erosion at sharp corners.
10. The gas lift valve of claim 7 , wherein the spring is fully-guided on an inside diameter (ID) of the spring for stability.
11. The gas lift valve of claim 7 , wherein a hex dart configuration prevents a rotation of a valve component caused by high velocity gas flow.
12. The gas lift valve of claim 7 , wherein the sliding barrel and the spring have a wide cross-sectional diameter substantially the same as a diameter of the dart valve element to maintain a sealing interface of the dart valve element and the valve seat in parallel-planar alignment with each other.
13. The gas lift valve of claim 7 , wherein the spring is protected from a main flow of the gas by the barrel.
14. The gas lift valve of claim 7 , wherein a sealing interface between the dart valve element and the valve seat is protected from a direct high speed flow of the gas by at least one valve component.
15. A method, comprising:
constructing a gas lift valve with a wide cylindrical sliding member to reliably seat a valve element; and
biasing the valve element toward a closed state with a wide spring around the wide cylindrical sliding member.
16. The method of claim 15 , wherein the wide cylindrical sliding member and the spring have a cross-sectional diameter substantially the same as a largest diameter of the valve element to maintain a sealing interface of the valve element and a valve seat in a parallel-planar alignment with each other; and
wherein the wide cylindrical sliding member protects the valve element and a valve seat from a full force of a gas injection flow.
17. The method of claim 15 , wherein the spring is protected from a main flow of an injection gas by the wise cylindrical sliding member.
18. The method of claim 15 , further comprising attaching a one-piece poppet-shaped valve element to the wide cylindrical sliding member to reliably close the gas lift valve during a back flow condition.
19. The method of claim 15 , further comprising:
incorporating a dart valve element in the gas lift valve to prevent a back flow condition; and
incorporating a hexagonal race for the wide cylindrical sliding member in the gas lift valve to prevent a rotation of the valve components caused by a high velocity gas flow.
20. The method of claim 19 , wherein the hexagonal race provides a flow path for a gas substantially free from sharp angular transitions; and wherein the hexagonal race counteracts erosion at sharp corners.
Priority Applications (1)
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US14/426,637 US20150233220A1 (en) | 2012-09-08 | 2013-09-06 | Gas lift valve |
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US201261698629P | 2012-09-08 | 2012-09-08 | |
US201261698627P | 2012-09-08 | 2012-09-08 | |
PCT/US2013/058364 WO2014039740A1 (en) | 2012-09-08 | 2013-09-06 | Gas lift valve |
US14/426,637 US20150233220A1 (en) | 2012-09-08 | 2013-09-06 | Gas lift valve |
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US20150233220A1 true US20150233220A1 (en) | 2015-08-20 |
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US14/426,637 Abandoned US20150233220A1 (en) | 2012-09-08 | 2013-09-06 | Gas lift valve |
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US (1) | US20150233220A1 (en) |
EP (1) | EP2893125A4 (en) |
BR (1) | BR112015005036A2 (en) |
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US10760376B2 (en) | 2017-03-03 | 2020-09-01 | Baker Hughes, A Ge Company, Llc | Pressure control valve for downhole treatment operations |
US11085261B2 (en) | 2017-08-17 | 2021-08-10 | Ziebel As | Well logging assembly |
WO2022040252A1 (en) * | 2020-08-18 | 2022-02-24 | Schlumberger Technology Corporation | Scale resistant backcheck valve |
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US9689241B2 (en) | 2014-11-26 | 2017-06-27 | General Electric Company | Gas lift valve assemblies having fluid flow barrier and methods of assembling same |
US9765603B2 (en) | 2014-11-26 | 2017-09-19 | General Electric Company | Gas lift valve assemblies and methods of assembling same |
CN105350944A (en) * | 2015-12-06 | 2016-02-24 | 长江大学 | Gas injection tool for continuous oil tube gas jack |
CN109667974A (en) * | 2018-12-04 | 2019-04-23 | 贵州航天凯山石油仪器有限公司 | A kind of High Pressure Difference opens water-quantity regulating device and method |
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- 2013-09-06 US US14/426,637 patent/US20150233220A1/en not_active Abandoned
- 2013-09-06 CA CA2883895A patent/CA2883895A1/en not_active Abandoned
- 2013-09-06 EP EP13834902.2A patent/EP2893125A4/en not_active Withdrawn
- 2013-09-06 WO PCT/US2013/058364 patent/WO2014039740A1/en active Application Filing
- 2013-09-06 BR BR112015005036A patent/BR112015005036A2/en not_active IP Right Cessation
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US4360064A (en) * | 1980-11-12 | 1982-11-23 | Exxon Production Research Co. | Circulating valve for wells |
US5191937A (en) * | 1991-02-22 | 1993-03-09 | Texaco Inc. | Offshore well remote control system |
US6305402B2 (en) * | 1996-08-15 | 2001-10-23 | Camco International Inc. | Variable orifice gas lift valve for high flow rates with detachable power source and method of using |
US20040182437A1 (en) * | 2003-03-21 | 2004-09-23 | Messick Tyson R. | Gas lift valve |
US20070215358A1 (en) * | 2006-03-17 | 2007-09-20 | Schlumberger Technology Corporation | Gas Lift Valve Assembly |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US10760376B2 (en) | 2017-03-03 | 2020-09-01 | Baker Hughes, A Ge Company, Llc | Pressure control valve for downhole treatment operations |
CN107120064A (en) * | 2017-05-11 | 2017-09-01 | 西南石油大学 | A kind of horizontal well jet send drill tools |
US11085261B2 (en) | 2017-08-17 | 2021-08-10 | Ziebel As | Well logging assembly |
WO2022040252A1 (en) * | 2020-08-18 | 2022-02-24 | Schlumberger Technology Corporation | Scale resistant backcheck valve |
GB2611999A (en) * | 2020-08-18 | 2023-04-19 | Schlumberger Technology Bv | Scale resistant backcheck valve |
Also Published As
Publication number | Publication date |
---|---|
BR112015005036A2 (en) | 2017-08-08 |
EP2893125A4 (en) | 2015-12-09 |
EP2893125A1 (en) | 2015-07-15 |
CA2883895A1 (en) | 2014-03-13 |
WO2014039740A1 (en) | 2014-03-13 |
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AS | Assignment |
Owner name: SCHLUMBERGER TECHNOLOGY CORPORATION, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TIONG, WENG KEONG;WANG, CHAO;LI, YUSHAN;SIGNING DATES FROM 20150129 TO 20150504;REEL/FRAME:035706/0549 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |