CN213510524U - Fisher for underground throttler - Google Patents
Fisher for underground throttler Download PDFInfo
- Publication number
- CN213510524U CN213510524U CN202022216878.2U CN202022216878U CN213510524U CN 213510524 U CN213510524 U CN 213510524U CN 202022216878 U CN202022216878 U CN 202022216878U CN 213510524 U CN213510524 U CN 213510524U
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- sleeve
- core rod
- connecting sleeve
- claw
- positioning
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Abstract
A fisher of an underground throttle is a steel wire operation technology in the production process of a natural gas well, solves the problems in the prior art, and comprises an outer sleeve, a fishing claw, a limiting sleeve, a connecting sleeve, a lower core rod, a spring, an upper core rod, a cylindrical pin and a positioning sleeve, wherein a female buckle at the upper end of the outer sleeve is connected with a male buckle at the lower end of the positioning sleeve; the connecting sleeve and the spring are sequentially sleeved on the lower core rod, and an inner shoulder at the upper part of the connecting sleeve is in contact positioning with an outer shoulder at the lower part of the lower core rod; the upper part of the salvaging claw is embedded into the trapezoidal groove at the lower part of the connecting sleeve and is fixed and limited by the limiting sleeve, the whole body is arranged in the outer sleeve, and the outer conical surface at the lower end of the salvaging claw is in contact positioning with the conical surface of the inner shoulder at the lower part of the outer sleeve; the male buckle at the upper end of the lower core rod is connected with the female buckle at the lower part of the upper core rod, and the positioning sleeve is sleeved on the upper core rod and fixed by a cylindrical pin.
Description
Technical Field
The utility model relates to a steel wire operation technique, especially a choke ware fisher in pit in natural gas well production process.
Background
At present, the underground throttling technology is a key technology commonly adopted in the production process of natural gas wells, and the technology can effectively reduce the running pressure of a ground pipe network and reduce the natural gas exploitation cost. In practical application, underground throttleers with various structures exist, some underground throttleers break off during fishing, most of the underground throttleers break off slips, slips and parts are fished out under general conditions, or slips fall into a well in the lifting process, underground residual parts can be fished by only a lower core rod with a bald part, a conventional underground throttleer fisher cannot be used for fishing, and a special fisher is needed for fishing out the underground throttleers to restore normal production of a natural gas well.
Disclosure of Invention
The utility model aims at providing a fisher of an underground throttleer with reasonable structure and reliable fishing, which solves the problems existing in the prior art, and the utility model aims at realizing the purpose, which comprises an outer sleeve, a fishing claw, a limit sleeve, a connecting sleeve, a lower core rod, a spring, an upper core rod, a cylindrical pin and a positioning sleeve, wherein a female buckle at the upper end of the outer sleeve is connected with a male buckle at the lower end of the positioning sleeve; the connecting sleeve and the spring are sequentially sleeved on the lower core rod, and an inner shoulder at the upper part of the connecting sleeve is in contact positioning with an outer shoulder at the lower part of the lower core rod; the upper part of the salvaging claw is embedded into the trapezoidal groove at the lower part of the connecting sleeve and is fixed and limited by the limiting sleeve, the whole body is arranged in the outer sleeve, and the outer conical surface at the lower end of the salvaging claw is in contact positioning with the conical surface of the inner shoulder at the lower part of the outer sleeve; the male buckle at the upper end of the lower core rod is connected with the female buckle at the lower part of the upper core rod, and the positioning sleeve is sleeved on the upper core rod and fixed by a cylindrical pin.
The upper part of the connecting sleeve is provided with an inner shoulder, the lower part of the lower core rod is provided with an outer shoulder, and the outer shoulder of the lower core rod is matched with the inner shoulder of the connecting sleeve in size; the upper end of the lower core rod is provided with a male buckle, the lower part of the upper core rod is provided with a female buckle, and the female buckle of the upper core rod is matched with the male buckle of the lower core rod; the lower part of the connecting sleeve is provided with a trapezoidal groove, the upper part of the fishing claw is provided with a trapezoidal structure, and the trapezoidal groove of the connecting sleeve is matched with the trapezoidal structure of the fishing claw.
The outer sleeve is provided with a female buckle at the upper end, a male buckle is arranged at the lower end of the positioning sleeve, and the male buckle of the positioning sleeve is matched with the female buckle at the upper end of the outer sleeve in size.
The fishing claw is composed of three parts with the same structure and size, the upper part of the fishing claw is provided with a trapezoidal structure which is matched with the trapezoidal groove of the connecting sleeve, the lower end of the fishing claw is provided with a guiding inner conical surface, and the interior of the fishing claw is provided with sawtooth threads.
The using method comprises the following steps: the fishing tool of the underground throttler is connected with a downhole tool string, the fishing tool string is put into an instrument vehicle, the tool string is quickly put down when the salvaged underground residual throttler is close, the lower part core rod of the underground residual throttler is automatically inserted into a fishing claw of the fishing tool through the inner guide of an outer sleeve of the fishing tool string by means of the inertia of the fishing tool string, the lower part core rod of the underground residual throttler is inwardly tightened and fished under the action of the conical surface of the inner shoulder of the lower part of the outer sleeve by lifting the fishing claw of the logging steel wire, and the logging steel wire is continuously lifted to take out the throttle. When the underground residual throttler cannot be fished out, the logging steel wire is continuously lifted up to generate shock, the operation is repeated until the cylindrical pin is cut off, the positioning sleeve and the outer sleeve go downwards, the fishing claw loses support and is separated from the core rod at the lower part of the residual throttler, and the releasing of the fishing tool string is completed.
The utility model has the following significance: the device has a unique fishing claw structure, can perform a carburizing and hardening treatment process, can effectively fish up the throttler remained in the underground, and improves the normal productivity recovery capability of the natural gas well.
Drawings
Fig. 1 is a schematic structural diagram of a fisher of a downhole choke, and in the diagram, 1, an outer sleeve 2, a fishing claw 3, a limiting sleeve 4, a connecting sleeve 5, a lower core rod 6, a spring 7, an upper core rod 8, a cylindrical pin 9 and a positioning sleeve are shown.
Fig. 2 is a cross-sectional view of the position A-A of a fishing tool of the downhole choke, wherein the cross-sectional view comprises an outer sleeve 1, an outer sleeve 2, a fishing claw 3 and a limiting sleeve.
Detailed Description
Embodiment 1, the utility model discloses an overcoat 1, drag for claw 2, stop collar 3, adapter sleeve 4, lower core bar 5, spring 6, upper core bar 7, cylindric lock 8, position sleeve 9, the box of overcoat 1 upper end is connected with the lower extreme pin thread of position sleeve 9; the connecting sleeve 4 and the spring 6 are sequentially sleeved on the lower core rod 5, and the inner shoulder at the upper part of the connecting sleeve 4 is in contact positioning with the outer shoulder at the lower part of the lower core rod 5; the upper part of the fishing claw 2 is embedded into a trapezoidal groove at the lower part of the connecting sleeve 4 and is fixed and limited by a limiting sleeve 3, the whole fishing claw is arranged in the outer sleeve 1, and the outer conical surface at the lower end of the fishing claw 2 is in contact positioning with the conical surface of the inner shoulder at the lower part of the outer sleeve 1; the male buckle at the upper end of the lower core rod 5 is connected with the female buckle at the lower part of the upper core rod 7, and the positioning sleeve 9 is fixed on the upper core rod 7 by the cylindrical pin 8.
In embodiment 2, an inner shoulder is arranged at the upper part of the connecting sleeve 4, an outer shoulder is arranged at the lower part of the lower core rod 5, and the outer shoulder of the lower core rod 5 is matched with the inner shoulder of the connecting sleeve 4 in size; the upper end of the lower core rod 5 is provided with a male buckle, the lower part of the upper core rod 7 is provided with a female buckle, and the female buckle of the upper core rod 7 is matched with the male buckle of the lower core rod 5; the lower part of the connecting sleeve 4 is provided with a trapezoidal groove, the upper part of the fishing claw 2 is provided with a trapezoidal structure, and the trapezoidal groove of the connecting sleeve 4 is adapted to the trapezoidal structure of the fishing claw 2.
Embodiment 4, drag for claw 2 to comprise the same part of three structure size, and its upper portion is provided with the trapezoidal structure and suits with the trapezoidal groove of adapter sleeve 4, and drag for claw 2 lower extreme and be provided with the guide internal cone, and its drag for claw 2 inside is provided with the sawtooth screw thread.
Claims (4)
1. The utility model provides a restriction ware fisher in pit, it includes overcoat (1), drags for claw (2), stop collar (3), adapter sleeve (4), core rod (5) down, spring (6), goes up core rod (7), cylindric lock (8), position sleeve (9), characterized by: the female buckle at the upper end of the outer sleeve (1) is connected with the male buckle at the lower end of the positioning sleeve (9); the connecting sleeve (4) and the spring (6) are sequentially sleeved on the lower core rod (5), and an inner shoulder at the upper part of the connecting sleeve (4) is in contact positioning with an outer shoulder at the lower part of the lower core rod (5); the upper part of the fishing claw (2) is embedded into a trapezoidal groove at the lower part of the connecting sleeve (4), is fixed and limited by a limiting sleeve (3), and is integrally arranged in the outer sleeve (1), and the outer conical surface at the lower end of the fishing claw (2) is in contact positioning with the conical surface of the inner shoulder at the lower part of the outer sleeve (1); the male buckle at the upper end of the lower core rod (5) is connected with the female buckle at the lower part of the upper core rod (7), and the positioning sleeve (9) is fixed on the upper core rod (7) by a cylindrical pin (8).
2. A downhole choke overshot as claimed in claim 1, wherein: the upper part of the connecting sleeve (4) is provided with an inner shoulder, the lower part of the lower core rod (5) is provided with an outer shoulder, and the outer shoulder of the lower core rod (5) is matched with the inner shoulder of the connecting sleeve (4) in size; the upper end of the lower core rod (5) is provided with a male buckle, the lower part of the upper core rod (7) is provided with a female buckle, and the female buckle of the upper core rod (7) is adapted to the male buckle of the lower core rod (5); the lower part of the connecting sleeve (4) is provided with a trapezoidal groove, the upper part of the fishing claw (2) is provided with a trapezoidal structure, and the trapezoidal groove of the connecting sleeve (4) is matched with the trapezoidal structure of the fishing claw (2).
3. A downhole choke overshot as claimed in claim 1, wherein: the upper end of the outer sleeve (1) is provided with a female buckle, the lower end of the positioning sleeve (9) is provided with a male buckle, and the male buckle of the positioning sleeve (9) is matched with the female buckle at the upper end of the outer sleeve (1) in size.
4. A downhole choke overshot as claimed in claim 1, wherein: the fishing claw (2) is composed of three parts with the same structure and size, the upper part of the fishing claw is provided with a trapezoidal structure which is matched with the trapezoidal groove of the connecting sleeve (4), the lower end of the fishing claw (2) is provided with a guiding inner conical surface, and the inside of the fishing claw (2) is provided with a sawtooth thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022216878.2U CN213510524U (en) | 2020-10-09 | 2020-10-09 | Fisher for underground throttler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022216878.2U CN213510524U (en) | 2020-10-09 | 2020-10-09 | Fisher for underground throttler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213510524U true CN213510524U (en) | 2021-06-22 |
Family
ID=76394577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022216878.2U Active CN213510524U (en) | 2020-10-09 | 2020-10-09 | Fisher for underground throttler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213510524U (en) |
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2020
- 2020-10-09 CN CN202022216878.2U patent/CN213510524U/en active Active
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