CN117266801A - Claw type plunger gas lift downhole positioning device with uniflow sand prevention function - Google Patents
Claw type plunger gas lift downhole positioning device with uniflow sand prevention function Download PDFInfo
- Publication number
- CN117266801A CN117266801A CN202210660354.3A CN202210660354A CN117266801A CN 117266801 A CN117266801 A CN 117266801A CN 202210660354 A CN202210660354 A CN 202210660354A CN 117266801 A CN117266801 A CN 117266801A
- Authority
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- Prior art keywords
- uniflow
- cylinder
- seat
- mandrel
- gas lift
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- 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.)
- Pending
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- 239000004576 sand Substances 0.000 title claims abstract description 73
- 230000002265 prevention Effects 0.000 title claims abstract description 41
- 210000000078 claw Anatomy 0.000 title claims description 4
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 229920001971 elastomer Polymers 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 3
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 3
- 241001330002 Bambuseae Species 0.000 claims description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 3
- 239000011425 bamboo Substances 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 10
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- 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
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/38—Arrangements for separating materials produced by the well in the well
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)
- Lift Valve (AREA)
Abstract
The invention discloses a claw-type plunger gas lift downhole seat with a uniflow sand prevention function, which comprises a salvaging head, wherein the salvaging head is connected with a guide cylinder along the inner side surface of the axial bottom end through threads, the bottom end of the guide cylinder is connected with a uniflow sealing structure, the uniflow sealing structure is clamped with a sand prevention cylinder, and the inner side surface of the axial bottom end of the sand prevention cylinder is connected with a clamping mechanism through threads. The invention has the sand prevention function, and meets the requirement of preventing upward strings and bearing 5 MPa. The sand control joint cutting channel can reduce the throttle resistance of the sand control pipe to the greatest extent, and effectively solve the application requirement of the sand gas well.
Description
Technical Field
The invention belongs to the technical field of drainage and gas production of oil and gas fields, and particularly relates to a claw-type plunger gas lift downhole seat with a uniflow sand control function.
Background
With the development of gas fields, the low-layer pressure and the yield of the gas well are gradually reduced, the liquid carrying capacity is gradually deteriorated, and the accumulated liquid in a shaft is continuously increased, so that the normal production of the gas well is affected. The plunger gas lift utilizes the plunger to form a mechanical interface between the lift gas and the produced liquid, thereby effectively preventing gas from channeling and liquid from slipping and improving the lifting efficiency. The process has the advantages of simplicity, practicability, one-time investment, stable and obvious drainage and gas production effect, capability of realizing good drainage and gas production effect basically without intervention of technicians during the measure period, and the like, and is an economic and effective drainage and gas production mode of the low-pressure low-yield gas well at present.
The plunger gas lift equipment mainly comprises a wellhead lubricator, a downhole seat, a plunger and a control system, wherein the plunger gas lift downhole seat usually adopts a claw-type seat in a coupling clamping mode, has the advantages of simple throwing and salvaging and high reliability, but has poor liquid drainage effect when a well is opened because of high water yield and low bottom pressure, and the well can flow back into a stratum at Guan Jingshi.
Disclosure of Invention
The invention aims to provide a claw type plunger gas lift downhole seat with a uniflow sand control function, which prevents liquid accumulation from flowing back during well closing and improves liquid discharge effect during well opening.
The technical scheme includes that the claw-type plunger gas lift downhole seat with the uniflow sand prevention function comprises a salvaging head, wherein the inner side surface of the bottom end of the salvaging head is axially connected with a guide cylinder through threads, the bottom end of the guide cylinder is connected with a uniflow sealing structure, the uniflow sealing structure is connected with a sand prevention cylinder, and the inner side surface of the bottom end of the sand prevention cylinder is connected with a clamping structure through threads.
The present invention is also characterized in that,
the side wall of the guide cylinder is provided with a pair of guide holes, and the pair of guide holes are positioned on the opposite side wall.
The uniflow sealing structure comprises a guide tube fixedly connected to the inner side surface of the bottom end of the guide tube, a valve base is slidably connected to the top end of the guide tube, the valve base is positioned in the guide tube, and a steel ball is arranged in the valve base; the guide tube is close to the medial surface of bottom through threaded connection there being the center tube, and the lateral surface that the center tube is close to the top fixedly connected with conical seat, conical seat joint is inboard to the guide tube, and the lateral surface of center tube is close to the bottom position along axial rigid coupling has the packing element, and the packing element bottom is connected with sand control section of thick bamboo.
An inner hexagonal cone section screw a is arranged between the rubber cylinder and the sand prevention cylinder, the outer side surface of the central tube is circumferentially fixed through the inner hexagonal cone section screw a, one side of the inner hexagonal cone section screw a is abutted with the rubber cylinder, and the other side is abutted with the sand prevention cylinder.
The inner side surface of the conical seat is provided with a ring groove along the circumference of the central tube, a sealing ring b is arranged in the ring groove, and the sealing ring b is positioned between the central tube and the conical seat.
A sealing ring a is arranged between the guide pipe and the guide cylinder.
The clamping structure comprises a mandrel which is connected to the inner side surface of the bottom end of the sand prevention cylinder through threads, and the axial direction of the mandrel is parallel to the axial direction of the sand prevention cylinder; the clamping seat and the switching block are in sliding connection with the mandrel, a clamping groove is formed in the inner side surface of the switching block, which is close to the collet, along the circumferential direction, and a clamping ring is arranged in the clamping groove; the bottom end of the mandrel is fixedly connected with a supporting sleeve, the supporting sleeve is positioned between the mandrel and the collet, and the bottom end of the collet is connected with a hanging spring through an elastic cylindrical pin.
The position of the outer side surface of the mandrel close to the top end is circumferentially fixed by an inner hexagonal cone section screw b.
The position, close to the bottom end, of the outer side surface of the mandrel is circumferentially fixed through a hexagonal conical section screw c, and the hexagonal conical section screw c is located between the mandrel and the collet.
The suspension springs exhibit two bends in opposite directions.
The invention has the advantages that,
(1) The invention has simple throwing, has a uniflow sealing effect, prevents the back flow of accumulated liquid and improves the liquid discharge effect during well opening.
(2) The invention has the sand prevention function, and meets the requirement of preventing upward strings and bearing 5 MPa. The sand control joint cutting channel can reduce the throttle resistance of the sand control pipe to the greatest extent, and effectively solve the application requirement of the sand gas well.
Drawings
FIG. 1 is a schematic diagram of a claw-type plunger gas lift downhole seat with uniflow sand control function of the present invention;
FIG. 2 is a schematic structural view of a uniflow seal structure in a claw-type plunger gas lift downhole seat with uniflow sand control function of the present invention;
FIG. 3 is a schematic structural view of a latch structure in a claw-type plunger gas lift downhole seat with uniflow sand control function of the present invention;
FIG. 4 is a schematic diagram of the structure of the clamping seat, the clamping ring and the switching block in the claw-type plunger gas lift downhole retainer with the uniflow sand control function.
In the figure, 1, a fishing head, 2, a steel ball, 3, a valve base, 4, a sealing ring a,5, a guide tube, 6, a central tube, 7, a conical seat, 8, a sealing ring b,9, a rubber cylinder, 10, an inner hexagonal conical section screw a,11, a sand prevention cylinder, 12, an inner hexagonal conical section screw b,13, a clamping seat, 14, a clamping ring, 15, a switching block, 16, a mandrel, 17, a collet, 18, a hexagonal conical section screw c,19, a supporting sleeve, 20, an elastic cylindrical pin, 21, a hanging spring, 22, a guide cylinder and 23, and a guide hole.
Detailed Description
The invention will be described in detail below with reference to the drawings and the detailed description.
The structure of the claw-type plunger gas lift downhole seat with the single-flow sand prevention function is shown in fig. 1, and the claw-type plunger gas lift downhole seat comprises a salvaging head 1, wherein the inner side surface of the salvaging head 1 along the axial bottom end is connected with a guide cylinder 22 through threads, the side wall of the guide cylinder 22 is provided with a pair of guide holes 23, and the pair of guide holes 23 are positioned on the opposite side wall; the draft tube 22 is connected with a uniflow sealing structure, the uniflow sealing structure is connected with a sand prevention tube 11, and the lower end of the sand prevention tube 11 is connected with a clamping structure through threads.
As shown in fig. 2, the uniflow sealing structure comprises a guide tube 5 fixedly connected to the inner circumferential surface of the bottom end of a guide tube 22, a sealing ring a4 is arranged between the guide tube 5 and the guide tube 22, a valve base 3 is slidably connected to the top end of the guide tube 5, the valve base 3 is positioned in the guide tube 22, and a steel ball 2 is arranged in the valve base 3; the inner side surface of the guide tube 5, which is close to the bottom end, is connected with a central tube 6 through threads, the outer side surface of the central tube 6, which is close to the top end, is fixedly connected with a conical seat 7, the section of the conical seat 7 is like a convex shape, the convex side surface of the conical seat 7 is abutted against the guide tube 5, the inner side surface of the conical seat 7 is provided with a ring groove along the circumferential direction of the central tube 6, a sealing ring b8 is arranged in the ring groove, and the sealing ring b8 is positioned between the central tube 6 and the conical seat 7;
the outer side surface of the central tube 6 close to the bottom end is fixedly connected with a rubber cylinder 9, the rubber cylinder 9 material is subjected to investigation and selection of fluororubber to meet the requirement of high temperature resistance, the rubber cylinder 9 is supported by the axial movement of the supporting conical seat 7, the annular sealing of the outer circle of the tool and the oil tube is realized, and a central channel is formed by a structure that gas and liquid can only flow in one direction from a stratum to the ground; the bottom end of the rubber cylinder 9 is connected with a sand prevention cylinder 11; an inner hexagonal cone section screw a10 is arranged between the rubber cylinder 9 and the sand prevention cylinder 11, the outer side face of the central tube 6 is circumferentially fixed through the inner hexagonal cone section screw a10, one side of the inner hexagonal cone section screw a10 is abutted against the rubber cylinder 9, the other side is abutted against the sand prevention cylinder 11, and the sand prevention cylinder 11 adopts an outer diameter line to cut a gap with a certain width so as to prevent sand from passing through, so that the throttling resistance of the sand prevention cylinder 11 is reduced most possibly.
As shown in fig. 3, the inner side surface of the bottom end of the sand control cylinder 11 is connected with a clamping structure through threads, the sand control cylinder 11 is arranged between the rubber cylinder 9 and the clamping mechanism to meet the requirements of preventing upward strings and bearing 5MPa, the clamping structure comprises a mandrel 16 which is connected with the inner side surface of the bottom end of the sand control cylinder 11 through threads, the position, close to the top end, of the outer side surface of the mandrel 16 is circumferentially fixed through an inner hexagonal cone screw b12, a collet 17 is sleeved on the outer side surface, close to the top end, of the mandrel 16, the position, close to the bottom end, of the outer side surface of the mandrel 16 is circumferentially fixed through a hexagonal cone screw c18, and the hexagonal cone screw c18 is positioned between the mandrel 16 and the collet 17; the inner side surface of the top end of the collet 17 is fixedly connected with a clamping seat 13 in sequence from top to bottom along the axial direction, the bottom end of the mandrel 16 is fixedly connected with a supporting sleeve 19, the supporting sleeve 19 is positioned between the mandrel 16 and the collet 17, the bottom end of the collet 17 is connected with a hanging spring 21 through an elastic cylindrical pin 20, and the hanging spring 21 presents two bends with opposite directions.
As shown in fig. 4, a switching block 15 is arranged below the clamping seat 13, the switching block 15 is fixedly connected to the inner side of the collet 17, the clamping seat 13 and the switching block 15 are in sliding connection with the mandrel 16, a clamping groove is formed in the inner side surface, close to the collet 17, of the switching block 15 along the circumferential direction, and a clamping ring 14 is arranged in the clamping groove.
Example 1
The inner side surface of the bottom end of the fishing head 1 is connected with a guide cylinder 22 along the axial direction of the fishing head 1 through threads, a pair of guide holes 23 are formed in the side wall of the guide cylinder 22, and the bottom end of the guide cylinder 22 is connected with a uniflow sealing structure, so that uniflow sealing effect is achieved, liquid accumulation backflow is prevented, and liquid discharge effect during well opening is improved; the uniflow sealing structure is also connected with the sand prevention barrel 11 to play a role in sand prevention, and the inner side surface of the bottom end of the sand prevention barrel 11 is axially connected with the clamping structure.
Example 2
The inner side surface of the bottom end of the salvaging head 1 is axially connected with a guide cylinder 22 through threads, the side wall of the guide cylinder 22 is provided with a pair of guide holes 23, the bottom end of the guide cylinder 22 is fixedly connected with a guide pipe 5, the top end of the guide pipe 5 is slidably connected with a valve base 3, the valve base 3 is provided with a steel ball in a matched mode, the inner side surface of the bottom end of the guide pipe 5 is sleeved with a central pipe 6 through threads, the outer side surface of the top end of the central pipe 6 is fixedly connected with a cone seat 7, the cone seat 7 is abutted with the guide pipe 5, the outer side surface of the bottom end of the central pipe 6 is fixedly connected with a rubber cylinder 9, the bottom end of the rubber cylinder 9 is detachably connected with a sand prevention cylinder 11, and the inner side surface of the bottom end of the sand prevention cylinder 11 is axially connected with a clamping structure.
Example 3
The inner side surface of the bottom end of the salvage head 1 is connected with a guide cylinder 22 along the axial direction of the salvage head 1 through threads, the side wall of the guide cylinder 22 is provided with a pair of guide holes 23, the bottom end of the guide cylinder 22 is connected with a uniflow sealing structure, the uniflow sealing structure is also connected with a sand prevention cylinder 11 for sand prevention, the inner side of the bottom end of the sand prevention cylinder 11 is connected with a mandrel 16, the outer side surface of the top end of the mandrel 16 is sleeved with a collet 17, the inner side surface of the top end of the collet 17 is fixedly connected with a clamping seat 13 and a switching block 15 in sequence from top to bottom along the axial direction, the clamping seat 13 and the switching block 15 are in sliding connection with the mandrel 16, the inner side surface of the switching block 15, which is close to the collet 17, is provided with a clamping groove along the circumferential direction, and the clamping ring 14 is clamped in the clamping groove; the bottom end of the mandrel 16 is fixedly connected with a supporting sleeve 19, the supporting sleeve 19 is positioned between the mandrel 16 and the collet 17, and the bottom end of the collet 17 is connected with a hanging spring 21 through an elastic cylindrical pin 20.
Example 4
The inner side surface of the bottom end of the salvage head 1 is connected with a guide cylinder 22 along the axial direction of the salvage head 1 through threads, the side wall of the guide cylinder 22 is provided with a pair of guide holes 23, the bottom end of the guide cylinder 22 is fixedly connected with a guide pipe 5, the top end of the guide pipe 5 is slidably connected with a valve base 3, the valve base 3 is provided with a steel ball in a matched manner, the inner side surface of the bottom end of the guide pipe 5 is sleeved with a central pipe 6 through threads, the outer side surface of the top end of the central pipe 6 is fixedly connected with a conical seat 7, the conical seat 7 is abutted with the guide pipe 5, the outer side surface of the bottom end of the central pipe 6 is fixedly connected with a rubber cylinder 9, the bottom end of the rubber cylinder 9 is detachably connected with a sand prevention cylinder 11, the inner side of the bottom end of the sand prevention cylinder 11 is connected with a mandrel 16, the outer side surface of the top end of the mandrel 16 is sleeved with a collet 17, the inner side surface of the top end of the collet 17 is fixedly connected with a clamping seat 13 and a switching block 15 in turn from top to bottom in the axial direction, the clamping seat 13 and the switching block 15 are slidably connected with the mandrel 16, the inner side of the collet 17 is provided with a clamping groove near the inner side of the collet 17 along the circumferential direction, and the clamping ring 14 is clamped in the clamping groove; the bottom end of the mandrel 16 is fixedly connected with a supporting sleeve 19, the supporting sleeve 19 is positioned between the mandrel 16 and the collet 17, and the bottom end of the collet 17 is connected with a hanging spring 21 through an elastic cylindrical pin 20.
When the device works, the fishing head 1 is connected with a throwing tool to throw the device into an oil well, the device is slowly thrown into a set well depth under the action of gravity, the throwing tool is lifted to a tubing coupling groove, the hanging spring 21 is opened through a coupling groove step of the tubing, and the hanging spring is lowered into a coupling groove;
when the device is successfully set, the put plunger falls above the device, the cone seat 7 supports the rubber cylinder 9 through axial movement to realize annular sealing between the outer side of the device and an oil pipe, and when a gas well is opened, the valve base 3 and the steel ball 2 are matched to form a channel which can only flow unidirectionally from a stratum to the ground, and a gap with a certain width is cut out by an outer diameter line of the sand prevention cylinder 11 to prevent sand from passing.
When the salvaging device is needed, the salvaging tool is lowered to the device position, when the force meter of the salvaging tool is reduced, the salvaging tool is stated to reach the top of the salvaging head 1, the salvaging tool is made to grasp the salvaging head 1 by the lower stroke, the salvaging tool is lifted up and then jarred until the device is unsealed, and the salvaging work is completed.
The invention has simple throwing, has a uniflow sealing effect, prevents the back flow of accumulated liquid and improves the liquid discharge effect during well opening; has sand prevention function, and meets the requirements of preventing upward strings and bearing 5 MPa. The sand control joint cutting channel can reduce the throttle resistance of the sand control pipe to the greatest extent, and effectively solve the application requirement of the sand gas well.
Claims (10)
1. Claw formula plunger gas lift is ware in pit with uniflow sand control function, a serial communication port, including salvaging head (1), salvage head (1) bottom medial surface has draft tube (22) through threaded connection along the axial, draft tube (22) bottom is connected with uniflow seal structure, uniflow seal structure is connected with sand control section of thick bamboo (11), sand control section of thick bamboo (11) bottom medial surface has the card structure through threaded connection.
2. The claw-type plunger gas lift downhole seat with single flow sand control function as claimed in claim 1, wherein a pair of diversion holes (23) are formed in the side wall of the diversion cylinder (22), and the pair of diversion holes (23) are located in the opposite side wall.
3. The claw-type plunger gas lift downhole seat with the single-flow sand prevention function according to claim 1, wherein the single-flow sealing structure comprises a guide pipe (5) fixedly connected to the inner side surface of the bottom end of a guide cylinder (22), a valve base (3) is slidably connected to the top end of the guide pipe (5), the valve base (3) is located in the guide cylinder (22), and a steel ball (2) is arranged in the valve base (3); the inner side surface of the guide tube (5) close to the bottom is connected with a central tube (6) through threads, the outer side surface of the central tube (6) close to the top is fixedly connected with a cone seat (7), the cone seat (7) is clamped to the inner side of the guide tube (5), the outer side surface of the central tube (6) is close to the bottom, a rubber cylinder (9) is fixedly connected to the outer side surface of the central tube (6) along the axial direction, and the bottom end of the rubber cylinder (9) is connected with a sand prevention cylinder (11).
4. The claw-type plunger gas lift downhole setting device with the uniflow sand control function according to claim 3, wherein an inner hexagonal cone screw a (10) is arranged between the rubber cylinder (9) and the sand control cylinder (11), the outer side surface of the central tube (6) is circumferentially fixed through the inner hexagonal cone screw a (10), one side of the inner hexagonal cone screw a (10) is abutted with the rubber cylinder (9), and the other side of the inner hexagonal cone screw a is abutted with the sand control cylinder (11).
5. The claw-type plunger gas lift downhole seat with the uniflow sand control function according to claim 3, wherein an annular groove is formed in the inner side surface of the conical seat (7) along the circumference of the central tube (6), a sealing ring b (8) is arranged in the annular groove, and the sealing ring b (8) is located between the central tube (6) and the conical seat (7).
6. The claw-type plunger gas lift downhole positioner with the single-flow sand prevention function according to claim 3, wherein a sealing ring a (4) is arranged between the guide pipe (5) and the guide cylinder (22).
7. The claw-type plunger gas lift downhole seat with the single-flow sand prevention function according to claim 1, wherein the clamping structure comprises a mandrel (16) connected to the inner side surface of the bottom end of the sand prevention barrel (11) through threads, and the axial direction of the mandrel (16) is parallel to the axial direction of the sand prevention barrel (11); a collet (17) is sleeved at the position, close to the top end, of the outer side surface of the mandrel (16), a clamping seat (13) and a switching block (15) are fixedly connected in sequence from top to bottom along the axial direction, the clamping seat (13) and the switching block (15) are in sliding connection with the mandrel (16), a clamping groove is formed in the inner side surface, close to the collet (17), of the switching block (15), and a clamping ring (14) is arranged in the clamping groove; the support sleeve (19) is fixedly connected to the bottom end of the mandrel (16), the support sleeve (19) is located between the mandrel (16) and the collet (17), and a hanging spring (21) is connected to the bottom end of the collet (17) through an elastic cylindrical pin (20).
8. The claw-type plunger gas lift downhole seat with the uniflow sand control function as claimed in claim 7, wherein the position of the outer side surface of the mandrel (16) close to the top end is circumferentially fixed by an inner hexagonal cone section screw b (12).
9. The claw-type plunger gas lift downhole seat with the uniflow sand control function as claimed in claim 8, wherein the position of the outer side surface of the mandrel (16) close to the bottom end is circumferentially fixed by a hexagonal cone section screw c (18), and the hexagonal cone section screw c (18) is located between the mandrel (16) and the collet (17).
10. The claw-type plunger gas lift downhole positioner with single flow sand control function as claimed in claim 7, wherein the suspension springs (21) are curved in opposite directions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660354.3A CN117266801A (en) | 2022-06-13 | 2022-06-13 | Claw type plunger gas lift downhole positioning device with uniflow sand prevention function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210660354.3A CN117266801A (en) | 2022-06-13 | 2022-06-13 | Claw type plunger gas lift downhole positioning device with uniflow sand prevention function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117266801A true CN117266801A (en) | 2023-12-22 |
Family
ID=89212948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210660354.3A Pending CN117266801A (en) | 2022-06-13 | 2022-06-13 | Claw type plunger gas lift downhole positioning device with uniflow sand prevention function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117266801A (en) |
-
2022
- 2022-06-13 CN CN202210660354.3A patent/CN117266801A/en active Pending
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