CN212743935U - Hydraulic fishing barrel device for continuous oil pipe - Google Patents
Hydraulic fishing barrel device for continuous oil pipe Download PDFInfo
- Publication number
- CN212743935U CN212743935U CN202021492595.4U CN202021492595U CN212743935U CN 212743935 U CN212743935 U CN 212743935U CN 202021492595 U CN202021492595 U CN 202021492595U CN 212743935 U CN212743935 U CN 212743935U
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- China
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- fishing
- coiled tubing
- fishing barrel
- pawl
- mandrel
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Abstract
The utility model discloses a hydraulic pressure fishing barrel device for coiled tubing contains an upper joint, a dabber, a big spring, an urceolus, a first nipple joint, a second nipple joint, a single current valve disk seat, a pawl, one cuts round pin, a little spring and a reverse single current valve. The utility model discloses a hydraulic pressure fishing barrel device for coiled tubing has following advantage: 1. the fishing device is simple and convenient to operate, the problem that the original fishing barrel cannot be circulated and used for well washing is solved by installing the reverse circulation check valve at the bottom of the mandrel, the function of the fishing barrel is increased, reliable guarantee is provided for successful fishing, and the success rate of fishing construction is improved; 2. a non-pressure difference balance hole is formed in the bottom of the fishing barrel, the internal and external pressure difference of the coiled tubing and the fishing barrel device is reduced, the safety of the hydraulic fishing barrel device and the coiled tubing equipment is guaranteed, the shear pin is installed on the mandrel and the pawl second short section, when other releasing devices cannot work, the releasing can be lifted through mechanical means, and the safety is high.
Description
Technical Field
The utility model relates to an oil pipe device, more exactly, is a hydraulic pressure fishing barrel device for coiled tubing.
Background
In recent years, when pumping perforation, test, steel wire operation and the like are constructed in an oil and gas field, the accidents of lifting and clamping a tool instrument and dropping a well often occur, and when the accident of a shaft cannot be solved through conventional salvage, the falling objects can be salvaged through the operation of going up the well by using a coiled tubing. However, existing fishing techniques suffer from a number of drawbacks:
1. the fishing device has no circulating channel, cannot wash and clean the fish top and a shaft on the upper part of the fish top, increases the risk of fishing construction, and reduces the fishing success rate;
2. the pressure difference inside and outside the tool is too large, an oil pipe is crushed, and the equipment safety cannot be ensured;
3. the pin shearing device is not released, if a pressure transfer hole is blocked or a tool sealing ring is damaged to release pressure, the pin can not be effectively released, and the shaft accident is easily complicated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses solve the technical problem that prior art exists to a hydraulic pressure fishing barrel device for coiled tubing is provided.
The above technical problem of the present invention can be solved by the following technical solutions:
a hydraulic fishing barrel device for a coiled tubing is characterized by comprising an upper joint, a mandrel, a large spring, an outer barrel, a first short section, a second short section, a check valve seat, a pawl, a shear pin, a small spring and a reverse check valve,
the upper joint is arranged at the head part of the outer cylinder,
the mandrel is arranged in the outer cylinder, the check valve seat is arranged at the tail part of the outer cylinder, the pawl is arranged at the tail part of the outer cylinder,
the pawl is connected with the large spring through the second short section and is linked with the large spring,
the reverse check valve is controlled to open and close through the small spring.
As the preferred embodiment of the utility model, the mandrel is provided with a pressure transmission hole.
As the utility model discloses the embodiment of preferred, the outer wall of dabber on be equipped with a first "O" type sealing washer, the inner wall of first nipple joint on be equipped with a second "O" type sealing washer, the outer wall of big second nipple joint on be equipped with a third "O" type sealing washer.
The utility model discloses a hydraulic pressure fishing barrel device for coiled tubing has following advantage:
1. the fishing device has the advantages that the structure is simple, the operation is simple and convenient, the problem that the original fishing barrel cannot circulate and wash a well is solved by installing the reverse circulation check valve at the bottom of the mandrel, the function of the fishing barrel is increased, the reliable guarantee is provided for the success of fishing, and the success rate of fishing construction is improved;
2. a non-pressure difference balance hole is formed in the bottom of the fishing barrel, the internal and external pressure difference of the coiled tubing and the fishing barrel device is reduced, the safety of the hydraulic fishing barrel device and the coiled tubing equipment is guaranteed, the shear pin is installed on the mandrel and the pawl second short section, when other releasing devices cannot work, the releasing device can be lifted through mechanical means, and the safety of whole engineering construction is greatly guaranteed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the structural schematic diagram of the hydraulic fishing cylinder device for coiled tubing of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
As shown in fig. 1, the hydraulic fishing barrel device for coiled tubing comprises an upper joint 1, a mandrel 2, a large spring 3, an outer barrel 4, a first short section 5, a second short section 6, a check valve seat 7, a pawl 8, a shear pin 9, a small spring 10 and a reverse check valve 11, wherein the upper joint 1 is arranged at the head of the outer barrel 4, the mandrel 2 is arranged inside the outer barrel 4, the check valve seat 7 is arranged at the tail of the outer barrel 4, the pawl 8 is connected with the large spring 3 through the second short section 6, the pawl 8 is linked with the large spring 3, and the reverse check valve 11 is controlled to open and close through the small spring 10.
The mandrel 2 is provided with a pressure transmission hole.
A first O-shaped sealing ring 12 is arranged on the outer wall of the mandrel 2, a second O-shaped sealing ring 13 is arranged on the inner wall of the first short section 5, and a third O-shaped sealing ring 14 is arranged on the outer wall of the large second short section 6.
During operation, the condition of the fish top is ascertained by connecting the tail end of the coiled tubing and lowering the coiled tubing to a preset depth, the fish top is washed by the ground reverse circulation pipeline, the fish is placed to salvage the underground falling objects after completion, the coiled tubing is lifted after successful capture, and the specific working process is as follows:
1. fishing step
(1) The coiled tubing is lowered to the position of the falling object, and the lower end of the hydraulic fishing cylinder device is provided with an inclined guide which can guide the top of the falling object to smoothly enter the fishing cylinder device;
(2) when the falling fish pushes the pawl 8 to move upwards along the inner wall cone of the outer cylinder 4, the large spring 3 is compressed;
(3) after the falling object fish top pushes the pawl 8 to cross the inner cone of the outer barrel 4, the inner diameter is increased, and the pawl 8 moves downwards under the reaction force of the large spring 3 to grab the fishing neck of the falling object;
(4) and lifting the coiled tubing to finish fishing the fallen objects.
2. Releasing step
(1) When the coiled tubing is lifted up and meets the blockage, the blockage cannot be released due to the movement;
(2) the oil pipe is positively pressed, pressure is guided through a pressure transmission hole in the mandrel 2, the large spring 3 is compressed, the pawl 8 is driven to retract, and the dropping releasing is completed;
(3) if the reverse check valve 11 is damaged and cannot be pressurized, the check valve channel can be blocked through ball throwing, and if the pressure transfer hole is blocked, the oil pipe can be lifted vigorously through machinery to shear the releasing pin, so that releasing is completed.
The utility model discloses a hydraulic pressure fishing barrel device for coiled tubing has following advantage:
1. the fishing device has the advantages that the structure is simple, the operation is simple and convenient, the problem that the original fishing barrel cannot circulate and wash a well is solved by installing the reverse circulation check valve at the bottom of the mandrel, the function of the fishing barrel is increased, the reliable guarantee is provided for the success of fishing, and the success rate of fishing construction is improved;
2. a non-pressure difference balance hole is formed in the bottom of the fishing barrel, the internal and external pressure difference of the coiled tubing and the fishing barrel device is reduced, the safety of the hydraulic fishing barrel device and the coiled tubing equipment is guaranteed, the shear pin is installed on the mandrel and the pawl second short section, when other releasing devices cannot work, the releasing device can be lifted through mechanical means, and the safety of whole engineering construction is greatly guaranteed.
Without being limited thereto, any changes or substitutions which are not thought of through creative efforts should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (3)
1. A hydraulic fishing barrel device for a coiled tubing is characterized by comprising an upper joint (1), a mandrel (2), a large spring (3), an outer barrel (4), a first short section (5), a second short section (6), a check valve seat (7), a pawl (8), a shear pin (9), a small spring (10) and a reverse check valve (11),
the upper joint (1) is arranged at the head part of the outer cylinder (4),
the mandrel (2) is arranged inside the outer cylinder (4), the check valve seat (7) is arranged at the tail part of the outer cylinder (4), the pawl (8) is arranged at the tail part of the outer cylinder (4),
the pawl (8) is connected with the large spring (3) through the second short section (6), and the pawl (8) is linked with the large spring (3),
the reverse check valve (11) is controlled to open and close through the small spring (10).
2. The hydraulic overshot device for coiled tubing according to claim 1, characterised in that the mandrel (2) is provided with a pressure transfer hole.
3. The hydraulic fishing barrel device for the coiled tubing according to claim 2, wherein a first O-shaped sealing ring (12) is arranged on the outer wall of the mandrel (2), a second O-shaped sealing ring (13) is arranged on the inner wall of the first nipple (5), and a third O-shaped sealing ring (14) is arranged on the outer wall of the second nipple (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021492595.4U CN212743935U (en) | 2020-07-27 | 2020-07-27 | Hydraulic fishing barrel device for continuous oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021492595.4U CN212743935U (en) | 2020-07-27 | 2020-07-27 | Hydraulic fishing barrel device for continuous oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212743935U true CN212743935U (en) | 2021-03-19 |
Family
ID=75023157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021492595.4U Active CN212743935U (en) | 2020-07-27 | 2020-07-27 | Hydraulic fishing barrel device for continuous oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212743935U (en) |
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2020
- 2020-07-27 CN CN202021492595.4U patent/CN212743935U/en active Active
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