CN117345163A - Double-sealing gas lift valve - Google Patents
Double-sealing gas lift valve Download PDFInfo
- Publication number
- CN117345163A CN117345163A CN202311650255.8A CN202311650255A CN117345163A CN 117345163 A CN117345163 A CN 117345163A CN 202311650255 A CN202311650255 A CN 202311650255A CN 117345163 A CN117345163 A CN 117345163A
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- China
- Prior art keywords
- valve
- gas lift
- gas
- joint
- pipe
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims description 53
- 230000001105 regulatory effect Effects 0.000 claims abstract description 24
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 230000007704 transition Effects 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 73
- 239000011261 inert gas Substances 0.000 abstract description 30
- 238000002347 injection Methods 0.000 abstract description 9
- 239000007924 injection Substances 0.000 abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The present invention relates to gas lift valves and, more particularly, to a double seal gas lift valve. The invention provides a double-seal gas lift valve capable of adjusting internal pressure after inert gas is injected into the gas lift valve, comprising an eccentric working cylinder and the like; the eccentric working cylinder is provided with a gas lifting valve core, the gas lifting valve core is communicated with the eccentric working cylinder through a through hole, and the gas lifting valve core is provided with a pressure regulating piece. According to the invention, the round through hole on the valve seat is blocked by the blocking cap to form a first layer of seal, the blind plug is screwed back on the valve seat to form a second layer of seal, so that inert gas in the valve sleeve can be prevented from overflowing, and the gas lift valve can work better; according to the invention, the space for storing the inert gas between the valve sleeve and the hollow tube can be regulated through the pressure regulating piece, so that the pressure in the valve sleeve can be regulated, and the pressure can be quickly regulated even if the injection amount of the inert gas in the valve sleeve is deviated, so that the gas lift valve is more convenient to use.
Description
Technical Field
The present invention relates to gas lift valves and, more particularly, to a double seal gas lift valve.
Background
The gas lift valve is the oil extraction method with the best economic benefit in the modern oil extraction process, the gas lift can not be limited by the depth of an oil well, and the injected gas can sequentially pass through the gas lift valves of all stages from top to bottom to go deep into the liquid, so that the weight of the liquid above the bottom of the oil pipe is lightened, the back pressure on the oil layer is reduced, and the smooth and continuous production of the oil well is ensured.
The gas lift valve is installed at the different depths of oil pipe, according to the oil pressure of different depths for the gas lift valve is opened gradually, consequently, in order to guarantee the normal work of gas lift valve, before the gas lift valve is installed, need according to the different depths of gas lift valve installation, inject different amounts of inert gas into the gas lift valve, according to the inert gas of different amounts, exert different pressures to the piston for the gas lift valve can be opened under different oil pressures, reaches the effect of injecting nitrogen gas into oil pipe under different depths.
The existing gas lift valve has a certain space inside the gas lift valve, when the internal pressure of the gas lift valve needs to be changed, the pressure can be adjusted only by changing the amount of inert gas injected into the gas lift valve, so that the amount of inert gas injected into each gas lift valve needs to be accurately controlled, if deviation occurs in the injection amount of the inert gas, the subsequent work of the gas lift valve can be influenced, and when the pressure in the gas lift valve needs to be changed after the inert gas is injected, the gas lift valve is very inconvenient.
Disclosure of Invention
In order to overcome the defects that when the pressure of the inert gas is regulated by injecting the inert gas into the existing gas lift valve, the injection amount needs to be accurately controlled, when the injection amount of the inert gas is not well controlled, the follow-up work of the gas lift valve can be influenced, and when the pressure in the gas lift valve needs to be changed after the inert gas is injected, the pressure regulating valve is very inconvenient, and the technical problem is that: a double-seal gas lift valve is provided which can adjust the internal pressure after the gas lift valve is filled with an inert gas.
The technical implementation scheme of the invention is as follows: the utility model provides a double-seal gas lift valve, including eccentric working cylinder, gas lift case and pressure regulating piece, be provided with the gas lift case on the eccentric working cylinder, the gas lift case passes through the through-hole intercommunication with the eccentric working cylinder, including the valve pocket in the gas lift case, set up the pressure regulating piece on the valve pocket, the pressure regulating piece is including the adapter piece, the hollow tube, connecting pipe I, the guide arm, piston board I, spring II, connecting pipe II and bleed valve, the hollow tube passes through the adapter piece parallel mount on the valve pocket, valve pocket and hollow tube pass through connecting pipe I intercommunication, coaxial heart in the hollow tube is installed the guide arm, sliding connection has piston board I on the guide arm, sliding connection department of piston board I and guide arm is connected with the sealing washer, be connected with spring II between piston board I and the hollow tube, the end connection of hollow tube has connecting pipe II, install the bleed valve on the connecting pipe II.
As a further preferred scheme, the gas lift case is including blind plug, sealing washer I, the nut, spring I, the disk seat, the valve rod, the tetrafluoro sealing member, keep off the cap, the clamping ring, the valve pocket, piston I, sealing washer II, the air inlet joint, the tetrafluoro sealing ring, transition joint and sealing washer III, there are air inlet connectors at the valve pocket right-hand member through threaded connection, air inlet connector is connected with two at least sealing washers with the threaded junction of valve pocket, the part symmetry that air inlet connector exposes the valve pocket is provided with the inlet port, air inlet connector slides in the part of valve pocket and sets up piston I, piston I is connected with two at least sealing washer II with the sliding junction of valve pocket, the air inlet connector other end has transition joint through threaded connection, transition joint middle part is hollow state, transition joint other end all is connected with sealing washer III through threaded connection in the through hole department of eccentric working cylinder and air inlet connector, transition joint is close to air inlet connector's terminal surface department, the tetrafluoro sealing ring is in the air inlet connector, the valve pocket other end has the disk seat through threaded connection, the disk seat is connected with two at least tetrafluoro sealing member with the junction of valve pocket, the center of disk seat is connected with round sealing member through the through hole sliding connection, the part of valve rod in the valve pocket slides and is connected with at least two sealing washer I through the nut, the other side that passes through the nut is connected with the valve seat through the blind cap, the valve seat through the middle part has the blind cap through the blind cap, the threaded connection, the other end is kept off the valve seat is connected with the valve seat through the valve seat.
As a further preferable scheme, one side of the tetrafluoro sealing ring, which is close to the piston I, is a downward concave inclined surface, one end of the piston I, which is close to the tetrafluoro sealing ring, is an outward convex inclined surface, and the diameter of the piston I is larger than the inner diameter of the tetrafluoro sealing ring.
As a further preferable scheme, one side of the blocking cap, which is close to the valve seat, is a convex inclined surface, one side of the valve seat, which is close to the blocking cap, is a concave inclined surface, and the diameter of the blocking cap is larger than that of the circular through hole in the center of the valve seat.
As a further preferred embodiment, the valve stem has an elliptical cross section in the middle so that a gap exists at the sliding connection of the valve stem to the valve seat.
As a further preferable scheme, the pressure regulating piece further comprises a cylinder body, an air suction pipe, a piston plate II, a spring III and a pull rod, wherein the end part of the connecting pipe II is connected with the cylinder body, the piston plate II is connected in a sliding manner in the cylinder body, the air suction pipe is connected on the cylinder body at the lower part of the piston plate II, the pull rod is arranged on the upper wall of the cylinder body in a sliding manner, the bottom end of the pull rod is connected at the center of the piston plate II, the spring III is connected between the piston plate II and the inner wall of the cylinder body, and the spring III is sleeved on the pull rod.
As a further preferable scheme, a one-way valve is arranged in a connecting pipe II from the air release valve to the cylinder body, gas in the cylinder body can enter the hollow pipe through the connecting pipe II, the gas in the hollow pipe cannot enter the cylinder body through the connecting pipe II, the air suction pipe is a one-way pipe, and only air can enter and cannot exit.
As a further preferable scheme, the air inlet connector is further provided with an air collecting cover, the air collecting cover is communicated with the air inlet connector through the air inlet hole, and an inclined surface which is retracted downwards is arranged inside the air collecting cover.
As a further preferable scheme, the eccentric working cylinder further comprises an extension pipe, and the extension pipe is arranged at the position of the through hole where the eccentric working cylinder is communicated with the transition joint.
As a further preferred embodiment, the outlet of the extension tube is opposite to the direction of liquid discharge in the oil tube.
The beneficial effects are as follows: 1. according to the invention, the round through hole on the valve seat is blocked by the blocking cap to form a first layer of seal, the blind plug is screwed back on the valve seat to form a second layer of seal, so that inert gas in the valve sleeve can be prevented from overflowing, and the gas lift valve can work better;
2. according to the invention, the space for storing inert gas between the valve sleeve and the hollow tube can be adjusted through the pressure adjusting piece, so that the pressure in the valve sleeve can be adjusted, and when the injection amount of the inert gas in the valve sleeve is deviated, the pressure can be quickly adjusted, so that the gas lift valve is more convenient to use;
3. according to the invention, the speed of nitrogen entering the oil pipe can be accelerated through the gas collecting hood, the speed of liquid in the oil pipe is improved, and meanwhile, the extension pipe is arranged at the through hole of the eccentric working cylinder, so that impurities of the liquid in the oil pipe can be prevented from blocking the through hole of the eccentric working cylinder.
Drawings
The above and other objects, features and advantages of embodiments of the present invention will become more readily apparent from the following detailed description with reference to the accompanying drawings. In the drawings, embodiments of the invention will be described by way of example and not limitation.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of the air lift valve core, the pressure regulating member and the air collecting cover of the present invention.
Fig. 3 is a cross-sectional view of a gas lift valve cartridge of the present invention.
Fig. 4 is an enlarged view of the present invention a.
Fig. 5 is an enlarged view of the present invention B.
Fig. 6 is a schematic perspective view of the pressure regulating member of the present invention.
Fig. 7 is a cross-sectional view of the pressure regulating member of the present invention.
Fig. 8 is a schematic perspective view of an extension tube according to the present invention.
Reference numerals in the figures: 1: eccentric working cylinder, 2: gas lift spool, 21: blind plug, 22: sealing rings i, 23: nut, 24: springs i, 25: valve seat, 26: valve stem, 27: tetrafluoro seal, 28: blocking cap, 29: compression ring, 210: valve housing, 211: pistons i, 212: sealing ring ii, 213: air intake joint, 214: tetrafluoro seal ring, 215: transition joint, 216: sealing rings iii, 217: inlet port, 3: pressure regulating piece, 31: a transfer block, 32: hollow tube, 33: connecting pipes i, 34: guide bar, 35: piston plates i, 36: springs ii, 37: connecting pipes ii, 38: bleed valve, 39: cylinder, 310: suction pipe, 311: piston plate ii, 312: springs iii, 313: pull rod, 4: gas collecting channel, 5: and (5) extending the pipe.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are illustrated in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object.
Examples: the double-seal gas lift valve comprises an eccentric working cylinder 1, a gas lift valve core 2 and a pressure regulating piece 3, wherein the gas lift valve core 2 is arranged on the eccentric working cylinder 1, the gas lift valve core 2 is communicated with the eccentric working cylinder 1 through a through hole, and the pressure regulating piece 3 is arranged on the gas lift valve core 2.
When the gas lift valve is used, inert gas is added into the gas lift valve core 2, if deviation occurs in the inert gas injected into the gas lift valve core 2, the pressure can be regulated through the pressure regulating piece 3, after the inert gas injection is finished, the gas lift valve core 2 is installed on the eccentric working cylinder 1 to form the gas lift valve, the combined gas lift valve is installed in an oil pipe, and when liquid in the oil pipe needs to be discharged, nitrogen enters the oil pipe through the gas lift valve, so that the pressure of the liquid in the oil pipe is reduced, and the liquid in the oil pipe can be discharged more quickly.
As shown in fig. 2-5, the gas lift valve core 2 comprises a blind plug 21, a sealing ring i 22, a nut 23, a spring i 24, a valve seat 25, a valve rod 26, a tetrafluoro sealing piece 27, a baffle cap 28, a compression ring 29, a valve sleeve 210, a piston i 211, a sealing ring ii 212, an air inlet joint 213, a tetrafluoro sealing ring 214, an excessive joint 215 and a sealing ring iii 216, wherein the air inlet joint 213 is connected with the right end of the valve sleeve 210 through threads, two sealing rings are connected with the threaded joint of the air inlet joint 213 and the valve sleeve 210, air inlet holes 217 are symmetrically arranged on the part of the air inlet joint 213 exposed out of the valve sleeve 210, a piston i 211 is arranged on the part of the air inlet joint 213 in the valve sleeve 210 in a sliding manner, three sealing rings ii 212 are connected with the sliding joint of the piston i 211 and the valve sleeve 210, the other end of the air inlet joint 213 is connected with the excessive joint 215 through threads, the middle part of the excessive joint 215 is in a hollow state, the other end of the transition joint 215 is connected with the through hole of the eccentric working cylinder 1 through threads, the joints of the transition joint 215, the eccentric working cylinder 1 and the air inlet joint 213 are connected with sealing rings III 216, the end face of the transition joint 215, which is close to the air inlet joint 213, is provided with a tetrafluoro sealing ring 214, the tetrafluoro sealing ring 214 is arranged in the air inlet joint 213, one side of the tetrafluoro sealing ring 214, which is close to a piston I211, is a downward concave inclined plane, one end of the piston I211, which is close to the tetrafluoro sealing ring 214, is an outward convex inclined plane, the diameter of the piston I211 is larger than the inner diameter of the tetrafluoro sealing ring 214, the other end of the valve sleeve 210 is connected with a valve seat 25 through threads, the joint of the valve seat 25 and the valve sleeve 210 is connected with two tetrafluoro sealing pieces 27, the center of the valve seat 25 is connected with a valve rod 26 through a circular through hole in a sliding way, the middle section of the valve rod 26 is elliptic, so that a gap exists at the sliding joint of the valve rod 26 and the valve seat 25, the part of valve rod 26 stretching into valve pocket 210 through disk seat 25 is connected with keeps off the cap 28, keep off the cap 28 and be the bellied inclined plane near one side of disk seat 25, the one side that the disk seat 25 is close to the cap 28 is the sunken inclined plane, the diameter of keeping off the cap 28 is greater than the diameter of disk seat 25 center circular through-hole, keep off the cap 28 opposite side and have clamping ring 29 through threaded connection, the one end that valve rod 26 exposes disk seat 25 has nut 23 through threaded connection, the cover is equipped with spring I24 on the valve rod 26 between nut 23 and the disk seat 25, the one end that valve seat 25 kept away from valve pocket 210 has blind 21 through threaded connection, the blind 21 is connected with two sealing washer I22 with the junction of disk seat 25.
As shown in fig. 6 and 7, the pressure regulating member 3 comprises a joint block 31, a hollow tube 32, a connecting tube i 33, a guide rod 34, a piston plate i 35, a spring ii 36, a connecting tube ii 37, a deflating valve 38, a cylinder 39, an air suction tube 310, a piston plate ii 311, a spring iii 312 and a pull rod 313, wherein the hollow tube 32 is arranged on a valve sleeve 210 in parallel through the joint block 31, the valve sleeve 210 is communicated with the hollow tube 32 through the connecting tube i 33, the guide rod 34 is arranged in the hollow tube 32 coaxially, the guide rod 34 is slidingly connected with the piston plate i 35, a sealing ring is connected at the sliding connection part of the piston plate i 35 and the guide rod 34, a spring ii 36 is connected between the piston plate i 35 and the hollow tube 32, the end part of the hollow tube 32 is connected with the connecting tube ii 37, the air release valve 38 is arranged on the connecting pipe II 37, the end part of the connecting pipe II 37 is connected with the cylinder body 39, the one-way valve is arranged in the connecting pipe II 37 from the air release valve 38 to the cylinder body 39, air in the cylinder body 39 can enter the hollow pipe 32 through the connecting pipe II 37, air in the hollow pipe 32 cannot enter the cylinder body 39 through the connecting pipe II 37, the piston plate II 311 is connected in a sliding manner in the cylinder body 39, the air suction pipe 310 is connected to the cylinder body 39 at the lower part of the piston plate II 311, the air suction pipe 310 is a one-way pipe, only air can enter and cannot exit, the pull rod 313 is arranged on the upper wall of the cylinder body 39 in a sliding manner, the bottom end of the pull rod 313 is connected to the center of the piston plate II 311, the spring III 312 is connected between the piston plate II 311 and the inner wall of the cylinder body 39, and the spring III 312 is sleeved on the pull rod 313.
When inert gas is injected into the gas lift valve core 2, firstly, the blind plug 21 is unscrewed, then the valve seat 25 is aligned with the inert gas outlet, the inert gas cylinder enters the valve seat 25, the valve rod 26 is pushed to move towards the valve sleeve 210, so that the blocking cap 28 is not blocking the circular through hole on the valve seat 25, meanwhile, when the valve rod 26 moves towards the valve sleeve 210, the spring I24 is compressed, at the moment, inert gas enters the valve sleeve 210 through the gap between the valve rod 26 and the valve seat 25, after the inert gas is added, the spring I24 is reset to drive the valve rod 26 and the blocking cap 28 to reset, the blocking cap 28 is used for blocking the circular through hole on the valve seat 25 again, a first layer of sealing is formed, then the blind plug 21 is screwed back on the valve seat 25, a second layer of sealing is formed, at the moment, when the inert gas injection amount in the valve sleeve 210 is smaller than a specified instruction, the pull rod 313 is pulled upwards, the piston plate II 311 is driven to move upwards, and the spring III 312 is compressed, outside air enters the cylinder 39 through the air suction pipe 310, then the pull rod 313 is loosened, the spring III 312 is reset to drive the piston plate II 311 and the pull rod 313 to move downwards for reset, air in the cylinder 39 enters the space on the right side of the piston plate I35 through the connecting pipe II 37 and drives the piston plate I35 to move leftwards, the spring II 36 stretches, when the piston plate I35 moves leftwards, the space where the valve sleeve 210 and the hollow pipe 32 store inert gas is reduced, the pressure in the valve sleeve 210 increases, and the process is repeated until the pressure in the valve sleeve 210 reaches a required value, if the injection amount of the inert gas in the valve sleeve 210 is larger than a specified instruction, the air release valve 38 is opened to enable the air in the space on the right side of the piston plate I35 to be released, the spring II 36 is contracted to drive the piston plate I35 to move rightwards, the space where the valve sleeve 210 and the hollow pipe 32 store the inert gas is enlarged, the pressure in the valve sleeve 210 is reduced, when the pressure value in the valve sleeve 210 reaches a specified value, the air release valve 38 is closed, then the air lift valve core 2 is fixed at the through hole of the eccentric working cylinder 1 through the transition joint 215 to form the air lift valve, after the air lift valve is installed in the oil pipe, nitrogen is injected into the annular space of the oil pipe, when the pressure in the annular space reaches the specified value, the pressure in the annular space pushes the piston I211 to move leftwards, the piston I211 does not block the tetrafluoro sealing ring 214, at the moment, the nitrogen enters the transition joint 215 through the air inlet hole 217, and then enters the oil pipe through the through hole on the eccentric working cylinder 1, so that the pressure of the liquid in the oil pipe is reduced, after the liquid in the oil pipe is discharged, the nitrogen injection is stopped, at the moment, the pressure in the annular space is reduced, and the pressure in the valve sleeve 210 pushes the piston I211 to reset, and the tetrafluoro sealing ring 214 is blocked again.
As shown in fig. 2 and 8, the device further comprises a gas collecting hood 4 and an extension pipe 5, wherein the gas collecting hood 4 is arranged on a gas inlet joint 213 at a gas inlet hole 217, the gas collecting hood 4 is communicated with the gas inlet joint 213 through the gas inlet hole 217, a downward retracted inclined plane is arranged inside the gas collecting hood 4, the extension pipe 5 is arranged at a through hole of the eccentric working cylinder 1, which is communicated with the transition joint 215, and the outlet of the extension pipe 5 is opposite to the liquid discharge direction in the oil pipe.
When nitrogen enters the oil pipe through the air inlet holes 217, the gas collecting hood 4 can accelerate the speed of the nitrogen entering the oil pipe, improve the speed of liquid discharge in the oil pipe, and simultaneously prevent impurities in the liquid in the oil pipe from blocking the through hole of the eccentric working cylinder 1 by the extension pipe 5 arranged at the through hole of the eccentric working cylinder 1.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
The above is only an alternative embodiment of the present invention and is not intended to limit the present invention, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a double containment gas lift valve, is including eccentric working cylinder (1), gas lift case (2) and pressure regulating piece (3), be provided with on the eccentric working cylinder (1) gas lift case (2), gas lift case (2) with eccentric working cylinder (1) are through the through-hole intercommunication, including valve pocket (210) in gas lift case (2), set up pressure regulating piece (3), characterized by on valve pocket (210): the pressure regulating piece (3) comprises a switching block (31), a hollow pipe (32), a connecting pipe I (33), a guide rod (34), a piston plate I (35), a spring II (36), a connecting pipe II (37) and a deflation valve (38), wherein the hollow pipe (32) is arranged on a valve sleeve (210) in parallel through the switching block (31), the valve sleeve (210) is communicated with the hollow pipe (32) through the connecting pipe I (33), the guide rod (34) is arranged on a coaxial core in the hollow pipe (32), the piston plate I (35) is connected onto the guide rod (34) in a sliding manner, a sealing ring is connected onto the sliding connection position of the piston plate I (35) and the guide rod (34), the spring II (36) is connected between the piston plate I (35) and the hollow pipe (32), the end part of the hollow pipe (32) is connected with the connecting pipe II (37), and the deflation valve (38) is arranged on the connecting pipe II (37).
2. A double-seal gas lift valve according to claim 1, wherein the gas lift valve core (2) comprises a blind plug (21), a sealing ring I (22), a nut (23), a spring I (24), a valve seat (25), a valve rod (26), a tetrafluoro sealing piece (27), a blocking cap (28), a compression ring (29), a valve sleeve (210), a piston I (211), a sealing ring II (212), an air inlet joint (213), a tetrafluoro sealing ring (214), an excessive joint (215) and a sealing ring III (216), the right end of the valve sleeve (210) is connected with the air inlet joint (213) through threads, at least two sealing rings are connected at the threaded joint of the air inlet joint (213) and the valve sleeve (210), air inlet holes (217) are symmetrically arranged at the part of the air inlet joint (213) exposed out of the valve sleeve (210), the piston I (211) is arranged at the sliding part of the valve sleeve (210), at least two air inlet joints II (212) are connected at the sliding joint of the piston I (211) and the valve sleeve (210), the other end (213) is connected with the air inlet joint (215) through the excessive joint (215) through threads, the other end of the transition joint (215) is connected to the through hole of the eccentric working cylinder (1) through threads, the joints of the transition joint (215) and the eccentric working cylinder (1) and the air inlet joint (213) are connected with sealing rings III (216), the part, close to the air inlet joint (213), of the transition joint (215) is provided with tetrafluoro sealing rings (214), the tetrafluoro sealing rings (214) are arranged in the air inlet joint (213), the other end of the valve sleeve (210) is connected with the valve seat (25) through threads, the joint of the valve seat (25) and the valve sleeve (210) is connected with at least two tetrafluoro sealing pieces (27), the center of the valve seat (25) is connected with the valve rod (26) through a circular through hole in a sliding manner, the part, which penetrates through the valve seat (25), of the valve rod (26) and stretches into the valve sleeve (210), the other side of the valve rod (26) is connected with the pressing ring (29) through threads, the valve rod (26) is exposed out of the valve seat (25) through threads, the valve seat (23) is connected with the valve seat (23), one end of the valve seat (25) far away from the valve sleeve (210) is connected with a blind plug (21) through threads, and the joint of the blind plug (21) and the valve seat (25) is connected with at least two sealing rings I (22).
3. A double seal gas lift valve according to claim 2, wherein the side of the tetrafluoro seal ring (214) adjacent to the piston i (211) is a downward concave inclined surface, the end of the piston i (211) adjacent to the tetrafluoro seal ring (214) is an outward convex inclined surface, and the diameter of the piston i (211) is larger than the inner diameter of the tetrafluoro seal ring (214).
4. A double-seal gas lift valve according to claim 2, wherein the side of the blocking cap (28) close to the valve seat (25) is a convex inclined surface, the side of the valve seat (25) close to the blocking cap (28) is a concave inclined surface, and the diameter of the blocking cap (28) is larger than the diameter of the central circular through hole of the valve seat (25).
5. A double seal gas lift valve according to claim 2, wherein the middle section of the valve stem (26) is oval such that a gap exists at the sliding connection of the valve stem (26) with the valve seat (25).
6. A double-seal gas lift valve according to claim 1, characterized in that the pressure regulating member (3) further comprises a cylinder body (39), an air suction pipe (310), a piston plate ii (311), a spring iii (312) and a pull rod (313), wherein the end part of the connecting pipe ii (37) is connected with the cylinder body (39), the piston plate ii (311) is slidably connected with the cylinder body (39) in the cylinder body (39), the air suction pipe (310) is connected to the upper wall of the cylinder body (39) in the lower part of the piston plate ii (311), the pull rod (313) is slidably arranged on the upper wall of the cylinder body (39), the bottom end of the pull rod (313) is connected to the center of the piston plate ii (311), the spring iii (312) is connected between the piston plate ii (311) and the inner wall of the cylinder body (39), and the spring iii (312) is sleeved on the pull rod (313).
7. A double-seal gas lift valve according to claim 6, wherein a one-way valve is arranged in the connecting pipe ii (37) from the air release valve (38) to the cylinder (39), the gas in the cylinder (39) can enter the hollow pipe (32) through the connecting pipe ii (37), the gas in the hollow pipe (32) can not enter the cylinder (39) through the connecting pipe ii (37), and the air suction pipe (310) is a one-way pipe, and only air can not enter the cylinder.
8. A double-seal gas lift valve according to claim 2, further comprising a gas collecting hood (4), wherein the gas collecting hood (4) is arranged on the gas inlet joint (213) at the gas inlet hole (217), the gas collecting hood (4) is communicated with the gas inlet joint (213) through the gas inlet hole (217), and the inside of the gas collecting hood (4) is a downward retracted inclined plane.
9. A double seal gas lift valve according to claim 2, further comprising an extension pipe (5), said extension pipe (5) being provided at a through hole of said eccentric mandrel (1) communicating with said transition joint (215).
10. A double seal gas lift valve according to claim 9, wherein the outlet of the extension pipe (5) is opposite to the direction of liquid discharge in the oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311650255.8A CN117345163B (en) | 2023-12-05 | 2023-12-05 | Double-sealing gas lift valve |
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| CN202311650255.8A CN117345163B (en) | 2023-12-05 | 2023-12-05 | Double-sealing gas lift valve |
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| CN117345163A true CN117345163A (en) | 2024-01-05 |
| CN117345163B CN117345163B (en) | 2024-02-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB944426A (en) * | 1960-03-07 | 1963-12-11 | Otis Eng Co | Air or gas lift valves for raising liquids in wells |
| US4251191A (en) * | 1979-06-11 | 1981-02-17 | Texaco Inc. | Method for lifting oil in a well |
| CN202500533U (en) * | 2011-11-25 | 2012-10-24 | 中国石油天然气股份有限公司 | Double-bellows gas lift valve with set pressure range value |
| US10851628B1 (en) * | 2019-12-19 | 2020-12-01 | Innovex Downhole Solutions, Inc. | Gas lift system |
| CN215057261U (en) * | 2021-04-22 | 2021-12-07 | 新疆瀚科油气技术服务有限公司 | Bridge type eccentric high-pressure gas lift valve |
| CN217898828U (en) * | 2022-06-13 | 2022-11-25 | 上海平安高压调节阀门有限公司 | Pneumatic film regulating valve |
-
2023
- 2023-12-05 CN CN202311650255.8A patent/CN117345163B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB944426A (en) * | 1960-03-07 | 1963-12-11 | Otis Eng Co | Air or gas lift valves for raising liquids in wells |
| US4251191A (en) * | 1979-06-11 | 1981-02-17 | Texaco Inc. | Method for lifting oil in a well |
| CN202500533U (en) * | 2011-11-25 | 2012-10-24 | 中国石油天然气股份有限公司 | Double-bellows gas lift valve with set pressure range value |
| US10851628B1 (en) * | 2019-12-19 | 2020-12-01 | Innovex Downhole Solutions, Inc. | Gas lift system |
| CN215057261U (en) * | 2021-04-22 | 2021-12-07 | 新疆瀚科油气技术服务有限公司 | Bridge type eccentric high-pressure gas lift valve |
| CN217898828U (en) * | 2022-06-13 | 2022-11-25 | 上海平安高压调节阀门有限公司 | Pneumatic film regulating valve |
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| Publication number | Publication date |
|---|---|
| CN117345163B (en) | 2024-02-06 |
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