CN220395642U - Downhole choke fishing tool - Google Patents
Downhole choke fishing tool Download PDFInfo
- Publication number
- CN220395642U CN220395642U CN202321714837.3U CN202321714837U CN220395642U CN 220395642 U CN220395642 U CN 220395642U CN 202321714837 U CN202321714837 U CN 202321714837U CN 220395642 U CN220395642 U CN 220395642U
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- China
- Prior art keywords
- throttle
- clamping sleeve
- elastic
- fishing tool
- plates
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- 210000000078 claw Anatomy 0.000 claims abstract description 49
- 238000003825 pressing Methods 0.000 claims abstract description 45
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000429 assembly Methods 0.000 claims abstract description 7
- 230000007704 transition Effects 0.000 claims description 17
- 238000001125 extrusion Methods 0.000 claims description 5
- 230000003993 interaction Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
The utility model discloses a fishing tool for an underground throttle, which comprises an upper connecting sleeve piece and a lower connecting sleeve piece arranged at the bottom of the upper connecting sleeve piece; the upper connecting sleeve comprises a connector connected with the throttle fishing tool string and a connecting cylinder arranged at the bottom end of the connector; the lower connecting sleeve comprises a clamping sleeve connected with the top of the throttle, and a plurality of clamping jaw assemblies are annularly arranged on the inner side wall of the clamping sleeve. The underground throttle fishing tool can realize the connection and fixation of the throttle through the elastic expansion of the claw, is convenient for fishing out the throttle from a gas well, can realize the expansion of the claw and the protective separation of the fishing head of the fishing tool through the interaction of the piston head and the pressing plate and other structures when the throttle is blocked by the inner wall of a shaft and cannot be taken out, avoids the underground accident caused by forced taking out, solves the problem that the current part of the fishing tool is separated from the throttle and needs to quickly knock a tool string, reduces the separation difficulty of the fishing tool and the throttle, and is convenient to operate.
Description
Technical Field
The utility model belongs to the technical field of fishing of throttlers, and particularly relates to a fishing tool for a downhole throttler.
Background
In natural gas exploitation, in order to meet the requirements of gas production depressurization, production limiting and energy saving, a throttling device such as a throttle is arranged underground in a gas well, and in the later production period of the gas well, in order to meet the production requirement and fully exert the productivity of the gas well, the throttle is required to be taken out from a shaft of the gas well; however, the friction force between the well wall of the partial gas well and the throttle is larger, if the well wall is forcibly taken out to easily cause underground accidents, the existing mode of disengaging the locking sleeve from the fishing head on the fishing tool needs to rapidly shake the knocking tool string, the operation is relatively inconvenient, and the disengaging operation between the fishing tool and the throttle is inconvenient.
The present utility model has been made in view of this.
Disclosure of Invention
In order to solve the technical problems, the utility model adopts the basic conception of the technical scheme that:
the utility model provides a downhole choke fishing tool, includes the upper junction box spare and sets up the lower junction box spare in upper junction box spare bottom;
the upper connecting sleeve comprises a connector connected with the throttle fishing tool string and a connecting cylinder arranged at the bottom end of the connector;
the lower connection external member includes the joint cover of being connected with the choke top, joint cover inside wall annular array has a plurality of clamping jaw subassemblies, and is provided with elastic component between clamping jaw subassembly and the joint cover, the inside supplementary separation subassembly that is used for pressing elastic component that is provided with of joint cover, and supplementary separation subassembly makes the clamping jaw subassembly separate with the choke after the expansion of clamping jaw subassembly through pressing elastic component.
As a preferable technical scheme of the utility model, the elastic component comprises a plurality of elastic boxes which are annularly arranged on the inner wall of the clamping sleeve, a movable plate which is slidably arranged in the elastic boxes, and a locking spring which is arranged in the elastic boxes and the two ends of which are respectively fixedly connected with the movable plate and the inner wall of the clamping sleeve.
As a preferable technical scheme of the utility model, the clamping jaw assembly comprises a vertical claw and a clamping jaw arranged at the bottom end of the vertical claw; the bottom of the elastic box is provided with a bottom groove, and the top of the vertical claw penetrates through the bottom groove and is fixedly connected with the bottom of the movable plate.
As a preferable technical scheme of the utility model, the auxiliary separation assembly comprises a movable rod inserted into the top of the clamping sleeve, a plurality of groups of pressing plates which are annularly arranged on the periphery of the movable rod and are rotationally connected with the top wall in the clamping sleeve, and a piston head which is arranged at the bottom end of the movable rod and used for extruding the pressing plates; rectangular grooves are formed in one face, away from the side wall of the clamping sleeve, of the elastic box, rectangular plates fixedly connected with the movable plates are arranged in the rectangular grooves, connecting plates are arranged on the outer side walls of the rectangular plates, kidney-shaped grooves are formed in the connecting plates, and extrusion shafts located in the kidney-shaped grooves are arranged at the bottom ends of the pressing plates.
As a preferable technical scheme of the utility model, the annular array of the top wall in the clamping sleeve is provided with shaft sleeves with the same number as the elastic boxes, each group of pressing plates are respectively positioned at two sides of the shaft sleeve, the inside of the shaft sleeve is inserted with connecting shafts with two ends respectively connected with the top ends of the pressing plates in a rotating way, and the two ends of each pressing shaft are respectively fixedly connected with the bottom ends of each group of pressing plates.
As a preferable technical scheme of the utility model, at least two groups of spoke plates are respectively inserted in the middle of each vertical claw, a transition ring is arranged on the bottom wall of the inside of the clamping sleeve, a transition inclined plane is arranged on the inner side wall of the transition ring, and the transition inclined plane extends to the claw.
The beneficial effects are that:
according to the underground throttle fishing tool, through the structures of the clamping sleeve, the elastic box, the movable plate, the locking spring, the vertical claw, the bottom groove, the movable rod, the pressing plate, the piston head and the like, the throttle can be connected and fixed through elastic expansion of the claw, the throttle can be conveniently fished out of a gas well, when the throttle cannot be taken out due to the obstruction of the inner wall of a shaft, the claw expansion and the protective separation of the fishing head of the fishing tool can be realized through the interaction of the piston head and the pressing plate and the like, the underground accident caused by forced taking out is avoided, the problem that the current part of the fishing tool is separated from the throttle and a tool string needs to be rapidly knocked is solved, the separation difficulty of the fishing tool and the throttle is reduced, and the operation is convenient.
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings.
Drawings
In the drawings:
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic perspective view of the lower connecting sleeve of the present utility model;
FIG. 3 is a schematic view of the bottom structure of FIG. 2 according to the present utility model;
FIG. 4 is a schematic cross-sectional view of the structure of FIG. 3 taken along the direction A-A in accordance with the present utility model;
FIG. 5 is a schematic view of the structure of the movable rod and piston head of the present utility model;
FIG. 6 is a schematic diagram illustrating the front view of FIG. 2 with FIG. 5 removed in accordance with the present utility model;
FIG. 7 is a schematic perspective view of the cross-section of FIG. 6 taken along the direction B-B in accordance with the present utility model;
FIG. 8 is a schematic view of the structure of FIG. 4 at C in accordance with the present utility model;
fig. 9 is a schematic diagram of the structure D in fig. 7 according to the present utility model.
In the figure: 1. a joint; 2. a connecting cylinder; 3. a clamping sleeve; 4. an elastic box; 5. a movable plate; 6. a locking spring; 7. a vertical claw; 8. a claw; 9. a bottom groove; 10. a movable rod; 11. pressing the plate; 12. a piston head; 13. rectangular grooves; 14. a rectangular plate; 15. a connecting plate; 16. a kidney-shaped groove; 17. an extrusion shaft; 18. a shaft sleeve; 19. a connecting shaft; 20. a spoke plate; 21. a transition ring; 22. and a transition inclined plane.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and the following embodiments are used to illustrate the present utility model.
As shown in fig. 1 to 9, a downhole choke fishing tool includes an upper connection sleeve and a lower connection sleeve disposed at the bottom of the upper connection sleeve; the upper connecting sleeve comprises a joint 1 connected with the throttle fishing tool string and a connecting cylinder 2 arranged at the bottom end of the joint 1; the lower connecting sleeve comprises a clamping sleeve 3 connected with the top of the throttle, a plurality of clamping jaw assemblies are annularly arranged on the inner side wall of the clamping sleeve 3, an elastic assembly is arranged between the clamping jaw assemblies and the clamping sleeve 3, an auxiliary separating assembly for pressing the elastic assembly is arranged in the clamping sleeve 3, and the auxiliary separating assembly separates the clamping jaw assemblies from the throttle after expanding by pressing the elastic assembly;
in this embodiment, the elastic component includes a plurality of elastic boxes 4 arranged on the inner wall of the clamping sleeve 3 in a ring shape, a movable plate 5 slidably disposed inside the elastic boxes 4, and a locking spring 6 disposed inside the elastic boxes 4 and having two ends fixedly connected to the movable plate 5 and the inner wall of the clamping sleeve 3 respectively; the locking spring 6 inside the elastic box 4 can provide clamping force for clamping and fixing the throttle fishing head for the clamping jaw assembly inside the clamping sleeve 3.
The clamping jaw assembly comprises a vertical claw 7 and a clamping jaw 8 arranged at the bottom end of the vertical claw 7; the bottom of the elastic box 4 is provided with a bottom groove 9, and the top of the vertical claw 7 passes through the bottom groove 9 and is fixedly connected with the bottom of the movable plate 5; it should be noted that, the salvaging head of some existing throttleers is in a T-shaped structure, the vertical claw 7 is fixedly connected with the bottom of the movable plate 5, and then the locking spring 6 provides elastic force for the vertical claw 7, so that the vertical claw 7 and the claw 8 are mutually matched to realize the clamping and fixing of the salvaging head of the throttleers.
The auxiliary separation assembly comprises a movable rod 10 inserted into the top of the clamping sleeve 3, a plurality of groups of pressing plates 11 which are annularly arranged on the periphery of the movable rod 10 and are rotationally connected with the top wall inside the clamping sleeve 3, and a piston head 12 which is arranged at the bottom end of the movable rod 10 and used for extruding the pressing plates 11; a rectangular groove 13 is formed in one surface of the elastic box 4, which is far away from the side wall of the clamping sleeve 3, a rectangular plate 14 fixedly connected with the movable plate 5 is arranged in the rectangular groove 13, a connecting plate 15 is arranged on the outer side wall of the rectangular plate 14, a waist-shaped groove 16 is formed in the connecting plate 15, and an extrusion shaft 17 positioned in the waist-shaped groove 16 is arranged at the bottom end of the pressing plate 11; it should be noted that, the top end of the movable rod 10 is fixedly connected with the bottom end of the connecting cylinder 2, and a positioning sleeve sleeved on the movable rod 10 is arranged at the top of the clamping sleeve 3 to promote the stability of the connection between the movable rod 10 and the clamping sleeve 3;
specifically, when the vertical claw 7 and the claw 8 fix the throttle fishing head, in the process of lifting upwards, when the throttle is difficult to move due to friction and obstruction of the inner wall of a gas well shaft, the movable rod 10 extrudes the pressing plate 11 through the piston head 12 to enable the pressing plate 11 to rotate, under the mutual cooperation of the extrusion shaft 17 and the kidney-shaped groove 16, the movable plate 5 is extruded along the bottom of the elastic box 4 to compress the locking spring 6, so that the vertical claw 7 and the claw 8 at the bottom are driven to move outwards, and all the vertical claws 7 and the claw 8 inside the clamping sleeve 3 move outwards to expand, so that the claw 8 and the throttle fishing head are separated.
The annular array of the top wall inside the clamping sleeve 3 is provided with shaft sleeves 18 which are equal to the elastic boxes 4 in number, each group of pressing plates 11 are respectively positioned at two sides of the shaft sleeves 18, connecting shafts 19 with two ends respectively connected with the top ends of the pressing plates 11 in a rotating way are inserted into the shaft sleeves 18, and two ends of each pressing shaft 17 are respectively fixedly connected with the bottom ends of each group of pressing plates 11; it should be noted that, the distance between the outer sides of each group of pressing plates 11 is smaller than the width of the rectangular groove 13, so that the pressing end at the bottom of the pressing plate 11 can realize the pressing action on the movable plate 5; through the arrangement of the shaft sleeve 18 and the connecting shaft 19, the pressing plate 11 is rotationally connected with the inner top wall of the clamping sleeve 3, the pressing shaft 17 is extruded, and the bottom ends of each group of pressing plates 11 are connected.
At least two groups of spoke plates 20 are respectively inserted in the middle of each vertical claw 7, the two groups of spoke plates 20 are arranged up and down, a transition ring 21 is arranged on the bottom wall inside the clamping sleeve 3, a transition inclined surface 22 is arranged on the inner side wall of the transition ring 21, and the transition inclined surface 22 extends to the claw 8; through the transition inclined plane 22, in the process that the fishing tool falls along the inner part of the gas well shaft, the structure of the fishing head of the throttle can smoothly enter the clamping jaw 8 along the transition inclined plane 22, and the success rate of the fishing of the throttle is improved.
It should be noted that, the above mentioned vertical claw 7 is provided with a sliding hole adapted to the spoke plate 20, through the arrangement of at least two groups of spoke plates 20, the stability that the vertical claw 7 follows the movement of the movable plate 5 is improved, and the spoke plate 20 above is located at the bottom of the piston head 12, so as to limit the piston head 12, prevent the piston head 12 from falling to the bottom of the clamping sleeve 3, and the spoke plate 20 below is located at the top of the throttle fishing head, so as to prevent the throttle fishing head from continuing to move upwards along the clamping sleeve 3 after passing through the claw 8.
Working principle: when the gas well shaft is used, a tool string consisting of a rope cap, a weighting rod, a jar and the fishing tool is placed in the gas well shaft, the fishing head of the throttle enters the gas well shaft by means of the inertial force of the falling of the tool string, the fishing head of the throttle moves along a transition inclined plane 22 and outwards extrudes a claw 8 to expand the claw 8, in the process, a movable plate 5 compresses a locking spring 6, and when the fishing head of the throttle passes through the claw 8, the claw 8 is restored to an initial state under the elastic force of the locking spring 6 so as to clamp the fishing head, and the throttle can be fished out along the gas well shaft; in the rising process of the throttle, when the throttle is blocked by the inner wall of a shaft and stops moving, the movable rod 10 of the fishing tool continues to move upwards along the center of the top of the clamping sleeve 3, the piston head 12 presses the pressing plate 11 upwards, the pressing plate 11 rotates, the movable plate 5 moves towards the inside of the elastic box 4 under the interaction of the pressing shaft 17 and the kidney slot 16, the locking spring 6 is compressed, the vertical claw 7 and the claw 8 at the bottom are driven to be close to the inner wall of the clamping sleeve 3, the claw 8 in the clamping sleeve 3 expands outwards, and when the claw 8 is positioned at the outer side of the fishing head of the throttle, the claw 8 is separated from the fishing head, so that the protective separation between the clamping sleeve 3 and the throttle is realized;
according to the underground throttle fishing tool, through the structures of the clamping sleeve 3, the elastic box 4, the movable plate 5, the locking spring 6, the vertical claw 7, the clamping claw 8, the bottom groove 9, the movable rod 10, the pressing plate 11, the piston head 12 and the like, the throttle can be connected and fixed through elastic expansion of the clamping claw 8, the throttle can be conveniently fished out of a gas well, when the throttle cannot be taken out due to obstruction of the inner wall of a shaft, the clamping claw 8 can be expanded and can be separated from the fishing head of the fishing tool in a protective manner through interaction of the piston head 12 and the pressing plate 11 and the like, the underground accidents caused by forced taking out are avoided, the problem that a quick knocking tool string is needed when the current part of the fishing tool is separated from the throttle is solved, the separation difficulty of the fishing tool and the throttle is reduced, and the operation is convenient.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and their equivalents.
Claims (3)
1. The utility model provides a downhole choke fishing tool, includes the upper junction box spare and sets up the lower junction box spare in upper junction box spare bottom;
the upper connecting sleeve comprises a connector (1) connected with the throttle fishing tool string and a connecting cylinder (2) arranged at the bottom end of the connector (1);
the lower connecting sleeve is characterized by comprising a clamping sleeve (3) connected with the top of the throttle, a plurality of clamping jaw assemblies are annularly arranged on the inner side wall of the clamping sleeve (3), an elastic assembly is arranged between the clamping jaw assemblies and the clamping sleeve (3), an auxiliary separating assembly for pressing the elastic assembly is arranged in the clamping sleeve (3), and the auxiliary separating assembly separates the clamping jaw assemblies from the throttle after being expanded by pressing the elastic assembly;
the elastic component comprises a plurality of elastic boxes (4) which are annularly arranged on the inner wall of the clamping sleeve (3), a movable plate (5) which is slidably arranged inside the elastic boxes (4) and a locking spring (6) which is arranged inside the elastic boxes (4) and the two ends of which are fixedly connected with the movable plate (5) and the inner wall of the clamping sleeve (3) respectively;
the clamping jaw assembly comprises a vertical claw (7) and a clamping jaw (8) arranged at the bottom end of the vertical claw (7); a bottom groove (9) is formed in the bottom of the elastic box (4), and the top of the vertical claw (7) penetrates through the bottom groove (9) and is fixedly connected with the bottom of the movable plate (5);
the auxiliary separation assembly comprises a movable rod (10) inserted into the top of the clamping sleeve (3), a plurality of groups of pressing plates (11) which are annularly arranged on the periphery of the movable rod (10) and are rotationally connected with the inner top wall of the clamping sleeve (3), and piston heads (12) which are arranged at the bottom ends of the movable rod (10) and used for extruding the pressing plates (11); rectangular grooves (13) are formed in one face, away from the side wall of the clamping sleeve (3), of the elastic box (4), rectangular plates (14) fixedly connected with the movable plates (5) are arranged inside the rectangular grooves (13), connecting plates (15) are arranged on the outer side walls of the rectangular plates (14), kidney-shaped grooves (16) are formed in the connecting plates (15), and extrusion shafts (17) located in the kidney-shaped grooves (16) are arranged at the bottom ends of the pressing plates (11).
2. A downhole choke fishing tool according to claim 1, wherein: the inner top wall annular array of the clamping sleeve (3) is provided with shaft sleeves (18) in the same number as the elastic boxes (4), each group of pressing plates (11) are respectively located on two sides of the shaft sleeves (18), connecting shafts (19) with two ends respectively connected with the top ends of the pressing plates (11) in a rotating mode are inserted into the shaft sleeves (18), and two ends of each pressing shaft (17) are respectively fixedly connected with the bottom ends of each pressing plate (11).
3. A downhole choke fishing tool according to claim 1, wherein: at least two groups of spoke plates (20) are respectively inserted in the middle of each vertical claw (7), a transition ring (21) is arranged on the inner bottom wall of the clamping sleeve (3), a transition inclined surface (22) is arranged on the inner side wall of the transition ring (21), and the transition inclined surface (22) extends to the claw (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321714837.3U CN220395642U (en) | 2023-06-30 | 2023-06-30 | Downhole choke fishing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321714837.3U CN220395642U (en) | 2023-06-30 | 2023-06-30 | Downhole choke fishing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220395642U true CN220395642U (en) | 2024-01-26 |
Family
ID=89598344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321714837.3U Active CN220395642U (en) | 2023-06-30 | 2023-06-30 | Downhole choke fishing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220395642U (en) |
-
2023
- 2023-06-30 CN CN202321714837.3U patent/CN220395642U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |