CN215595530U - Fishing tool for rod-shaped falling objects - Google Patents
Fishing tool for rod-shaped falling objects Download PDFInfo
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- CN215595530U CN215595530U CN202120392820.5U CN202120392820U CN215595530U CN 215595530 U CN215595530 U CN 215595530U CN 202120392820 U CN202120392820 U CN 202120392820U CN 215595530 U CN215595530 U CN 215595530U
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- slip
- rod
- shaped
- slip assembly
- fishing tool
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Abstract
The utility model provides a rod-shaped junk fishing tool, which comprises a slip assembly, an elastic piece and an outer sleeve, wherein the elastic piece is arranged at the upper end of the slip assembly in a compressed manner in an abutting mode, the outer sleeve is arranged outside the slip assembly and the elastic piece, and an inverted cone-shaped shrinkage hole is formed in the position, where the slip assembly is arranged, of the outer sleeve; the slip assembly comprises at least two slip flaps arranged along the circumferential direction of the outer sleeve, the slip flaps are attached to the inner surface of the inverted cone-shaped shrinkage hole under the action of the elastic piece, and a shrinkage gap is reserved between every two adjacent slip flaps; the contraction gap is gradually reduced when the slip flap moves downwards along the inverted cone-shaped contraction hole so as to form an occlusion cavity for gripping the rod-shaped falling object. The utility model has the advantages of large biting force, capability of judging whether the rod-shaped falling object is captured or not and the like.
Description
Technical Field
The utility model relates to the field of oil and gas drilling and workover operations, in particular to a rod-shaped junk fishing tool.
Background
Hydrostatic pressure steel wire and cable testing work is often carried out in the oil and gas field production, and rod-shaped test instrument, the problem of weighing rod well fall occasionally takes place among the test operation process, and this can bring the difficulty for oil and gas well production and workover. In order to solve the technical problem, at present, two modes of window-closing fishing-barrel fishing and milling and grinding shoes are generally adopted to fish the rod-shaped falling objects. When the closed window fishing barrel is adopted for fishing, the problem that rod-shaped falling objects cannot be gripped and firmly gripped often exists due to limited strength of the window tongues, and whether fishing is carried out or not is not easy to judge from tonnage and pump pressure due to lighter falling objects and large inner diameter of the fishing barrel after fishing. When the milling treatment is carried out by adopting the milling shoe, the milling efficiency is low because the rod-shaped falling object pushes the core and moves, and the sleeve is easy to damage due to long milling time. Therefore, the existing rod-shaped falling object salvaging method cannot ensure the reliable and effective salvaging of the rod-shaped object in the aspects of the size of the occlusion force and the capturing display.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a fishing tool for rod-shaped falling objects, which has large biting force and can judge whether the rod-shaped falling objects are captured or not.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
a rod-shaped junk fishing tool comprises a slip assembly, an elastic piece and an outer sleeve, wherein the elastic piece is arranged at the upper end of the slip assembly in a compressed mode and abuts against the outer sleeve outside the slip assembly and the elastic piece; the slip assembly comprises at least two slip flaps arranged along the circumferential direction of the outer sleeve, the slip flaps are attached to the inner surface of the inverted cone-shaped shrinkage hole under the action of the elastic piece, and a shrinkage gap is reserved between every two adjacent slip flaps; the contraction gap is gradually reduced when the slip flap moves downwards along the inverted cone-shaped contraction hole so as to form an occlusion cavity for gripping the rod-shaped falling object.
As a further improvement of the above technical solution:
the inner side wall of the slip segment is provided with a plurality of meshing teeth for grabbing rod-shaped falling objects, and the meshing teeth are arranged along the axial direction of the slip segment.
The tooth angle of the meshing tooth is arranged towards the direction of the elastic piece.
The slip valve comprises an upper equal-diameter section and a lower inverted cone section, and the outer surface of the lower inverted cone section is attached to the inner surface of the inverted cone shrinkage hole. The bottom of the slip segment is provided with an avoiding chamfer angle which facilitates the rod-shaped falling object to enter the slip assembly.
The inside wall of overcoat is equipped with spacing step, the elastic component is the compression form and locates spacing step with between the slips subassembly.
The elastic piece is a spiral spring.
The outer sleeve comprises an upper joint and a lower joint which are connected with each other, the upper joint is connected with an external pipe column, and the bottom end of the lower joint is provided with a guide shoe for guiding a rod-shaped falling object to the inside of the slip assembly.
The guide shoe is a conical guide groove, and the inner side wall of the conical guide groove is an arc-shaped curved surface.
Compared with the prior art, the utility model has the advantages that:
the slip assembly is provided with a plurality of slip flaps arranged along the circumferential direction of the outer sleeve, and the slip assembly has certain contraction and expansion space due to the split arrangement mode, is high in expansion flexibility, and can simultaneously meet the requirements of effective introduction and clenching of rod-shaped falling objects; and the outer sleeve is internally provided with an inverted cone-shaped shrinkage hole which provides enough shrinkage space for the slip assembly, and the slip flap can radially shrink and bite the rod-shaped falling object when moving downwards along the inverted cone-shaped shrinkage hole. The utility model ensures that the rod-shaped falling object has enough biting force through the combination of the slip flaps and the inverted cone-shaped shrinkage holes, avoids the falling phenomenon of the rod-shaped falling object after fishing, can effectively meet the fishing requirements of the rod-shaped falling object with light weight and small size, and ensures the smooth and safe operation of oil-gas production and well repairing operation.
According to the utility model, the elastic piece is arranged at the upper end of the slip component, and the slip component can be effectively attached to the inner surface of the inverted cone-shaped shrinkage hole due to the arrangement of the elastic piece, so that the slip component is ensured to be in a fixed installation state; when the rod-shaped falling object is introduced into the slip assembly, the elastic element enables the slip assembly to be in a free movement state under the acting force of the rod-shaped falling object, and at the moment, the slip assembly has a certain free movement space to enable the rod-shaped falling object to fully enter the slip assembly; meanwhile, when the tool is lifted, the elastic element provides a downward moving driving force for the slip assembly to move downward along the inverted cone-shaped shrinkage hole under the synergistic effect of the jacking force of the elastic element and the friction force between the slip assembly and the rod-shaped falling object, and the rod-shaped falling object is gripped. Therefore, the elastic piece solves the problems of fixed installation of the slip assembly and effective salvage of the rod-shaped falling object, and is ingenious in design and simple in structure.
Meanwhile, the occlusion cavity formed by the contraction of the slip valve bites the rod-shaped falling object, so that the gap of the occlusion position is very small, at the moment, the circulating channel is basically in a blocking state, a certain pump pressure is provided for the circulating channel through the circulating pump, whether the rod-shaped falling object is fished or not can be judged, if the pump pressure rises, the rod-shaped falling object is fished, otherwise, the rod-shaped falling object is not fished. The utility model can conveniently judge whether the rod-shaped falling object is fished, thereby effectively ensuring the reliable and effective fishing of the rod-shaped falling object.
Drawings
The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 is a schematic view of the configuration of the present rod fish fishing tool.
Fig. 2 is a schematic structural view of the slip segments of the present invention.
The reference numerals in the figures denote:
1. a slip assembly; 11. a slip segment; 111. engaging teeth; 112. a lower inverted conical section; 113. an upper equal diameter section; 114. avoiding chamfering; 2. an elastic member; 3. a jacket; 31. an inverted cone-shaped shrinkage cavity; 32. a limiting step; 33. an upper joint; 34. a lower joint; 4. a guide shoe.
Detailed Description
The utility model will be described in further detail with reference to the drawings and specific examples, without thereby limiting the scope of the utility model.
Referring to fig. 1 and 2, an embodiment of the rod fish fishing tool of the present invention is shown, which includes a slip assembly 1, a resilient member 2, and an outer sleeve 3. Wherein, the elastic element 2 is pressed against the upper end of the slip component 1 in a compressed state; the outer sleeve 3 is arranged outside the slip assembly 1 and the elastic element 2, and an inverted cone-shaped shrinkage hole 31 is formed in the position, where the slip assembly 1 is arranged, of the outer sleeve 3; the slip assembly 1 comprises at least two slip segments 11, the two slip segments 11 being arranged circumferentially of the casing 3. The slip segments 11 are attached to the inner surface of the inverted cone-shaped shrinkage hole 31 under the action of the elastic part 2, and a shrinkage gap is reserved between every two adjacent slip segments 11; the retraction gap is gradually reduced as the slip segments 11 are moved down the reverse tapered retraction holes 31 to form an engagement cavity to grip the rod drop.
The slip assembly 1 is provided with a plurality of slip segments 11 arranged along the circumferential direction of the outer sleeve 3, and the slip assembly 1 has certain contraction and expansion space in a split type arrangement mode, so that the slip assembly 1 has high flexibility in expansion and contraction, and can simultaneously meet the requirements of effective introduction and clenching of rod-shaped falling objects; and an inverted cone-shaped shrinkage hole 31 is arranged in the outer sleeve 3, which provides enough shrinkage space for the slip assembly 1, and the slip flap 11 can radially shrink and bite the rod-shaped falling object when moving downwards along the inverted cone-shaped shrinkage hole 31. The utility model ensures that the rod-shaped falling object has enough biting force by the combination of the slip flaps 11 and the inverted cone-shaped shrinkage holes 31, avoids the falling phenomenon of the rod-shaped falling object after fishing, can effectively meet the fishing requirements of the rod-shaped falling object with light weight and small size, and ensures the smooth and safe operation of oil-gas production and well repairing operation.
The upper end of the slip assembly 1 is provided with the elastic piece 2, and the slip assembly 1 can be effectively attached to the inverted cone-shaped shrinkage hole 31 due to the arrangement of the elastic piece 2, so that the slip assembly 1 is ensured to be in a fixed installation state; when a rod-shaped falling object is introduced into the slip assembly 1, the elastic element 2 enables the slip assembly 1 to be in a free movement state under the acting force of the rod-shaped falling object, and at the moment, the slip assembly 1 has a certain free movement space to enable the rod-shaped falling object to fully enter the slip assembly 1; meanwhile, when the tool is lifted, the elastic element 2 provides a downward movement driving force for the slip assembly 1, so that the slip assembly 1 can move downward along the inverted cone-shaped shrinkage hole 31 under the synergistic effect of the jacking force of the elastic element 2 and the friction force between the slip assembly 1 and the rod-shaped falling object, and the rod-shaped falling object is gripped. Therefore, the elastic piece 2 solves the problems of fixed installation of the slip assembly 1 and effective salvage of the rod-shaped falling object, and is ingenious in design and simple in structure.
Meanwhile, the occlusion cavity formed by the slip valve 11 is contracted to bite the rod-shaped falling object, so that the gap of the occlusion position is very small, at the moment, the circulating channel is basically in a blocking state, a certain pump pressure is provided for the circulating channel through the circulating pump to judge whether the rod-shaped falling object is fished or not, if the pump pressure rises, the rod-shaped falling object is fished, otherwise, the rod-shaped falling object is not fished. The utility model can conveniently judge whether the rod-shaped falling object is fished, thereby effectively ensuring the reliable and effective fishing of the rod-shaped falling object.
In this embodiment, there are two slip segments 11, and two slip segments 11 are half arc structures, and a contraction gap is left between two adjacent slip segments 11. In other embodiments, the slip segments 11 may be arranged in three, four, etc. and the adjacent slip segments 11 may have a contraction gap therebetween. In this embodiment, the material of the slip segments 11 is 42CrMo, which has high strength.
As shown in fig. 2, further, the inner side wall of the slip segments 11 is provided with a plurality of engaging teeth 111, and the plurality of engaging teeth 111 are arranged along the axial direction of the slip segments 11 to effectively grip the rod-shaped drop. In this embodiment, the tooth angle of the engaging tooth 111 is arranged toward the direction of the elastic member 2, so as to facilitate the introduction of the rod-shaped drop into the slip segment 11, prevent the introduced rod-shaped drop from falling, and ensure the rod-shaped drop to be reliably introduced into the slip segment 11.
In this embodiment, the slip segments 11 include an upper constant diameter section 113 and a lower reverse tapered section 112, and the outer surface of the lower reverse tapered section 112 is attached to the inner surface of the reverse tapered bore 31. Namely, when the slip segment 11 is installed, the lower inverted cone-shaped section 112 is attached to the inner surface of the upper part of the inverted cone-shaped shrinkage cavity 31 under the action of the jacking force of the elastic element 2; meanwhile, when the fishing tool is lifted, the slip segments 11 move downwards under the action of the jacking force of the elastic piece 2 and the friction force between the slip assembly 1 and the rod-shaped falling object, at the moment, the lower inverted cone-shaped section 112 moves downwards along with the elastic piece and is attached to the inner surface of the lower part of the inverted cone-shaped shrinkage hole 31, so that the slip segments 11 are attached to the inner surface of the inverted cone-shaped shrinkage hole 31 during installation and shrinkage, the reliability is high, and the rod-shaped falling object is effectively fished.
Further, the bottom end of the slip segment 11 is provided with an avoiding chamfer 114 to avoid interference of the rod-shaped falling object during introduction, so that the rod-shaped falling object can effectively enter the slip assembly 1.
As shown in fig. 1, further, the inner side wall of the outer sleeve 3 is provided with a limit step 32, and the elastic element 2 is arranged between the limit step 32 and the slip assembly 1 in a compressed manner, so that the structure is compact and the occupied space is small. In this embodiment, the elastic member 2 is a coil spring.
Further, the jacket 3 includes an upper joint 33 and a lower joint 34. Wherein, the upper joint 33 is connected with the lower joint 34 by screw thread, and the upper joint 33 is connected with an external pipe column; the lower end of the lower sub 34 is provided with a guide shoe 4 to facilitate the introduction of a rod drop into the interior of the slip assembly 1. As shown in fig. 1, further, the guide shoe 4 is a tapered guide channel, and the inner side wall of the tapered guide channel is curved to better facilitate the entry of the rod-shaped drop into the slip assembly 1.
In this embodiment, the working principle of the rod-shaped junk fishing tool is as follows: in the process of fishing the rod-shaped falling object, when the tool meets the top of the falling object, the fishing tool is pressed downwards, the rod-shaped falling object is introduced into the slip assembly 1 through the guide shoe 4, at the moment, the slip segments 11 are forced to expand and go upwards to compress the elastic element 2, so that the rod-shaped falling object fully enters the slip assembly 1; after the rod-shaped falling object is introduced into the slip assembly 1, the fishing tool is lifted, the slip assembly 1 descends along the inverted cone-shaped shrinkage hole 31 by means of the jacking force of the elastic element 2 and the friction force between the slip assembly 1 and the rod-shaped falling object, and the slip flaps 11 are radially shrunk to bite the rod-shaped falling object, so that fishing is achieved. Meanwhile, the circulating channel is reduced due to fishing of the rod-shaped falling objects, and whether the rod-shaped falling objects are fished or not can be judged through the pressure rise of the circulating pump.
While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. A rod-shaped junk fishing tool is characterized by comprising a slip assembly, an elastic piece and an outer sleeve, wherein the elastic piece is arranged at the upper end of the slip assembly in a compressed mode and abuts against the slip assembly, the outer sleeve is arranged outside the slip assembly and the elastic piece, and an inverted cone-shaped shrinkage hole is formed in the position, where the slip assembly is arranged, of the outer sleeve; the slip assembly comprises at least two slip flaps arranged along the circumferential direction of the outer sleeve, the slip flaps are attached to the inner surface of the inverted cone-shaped shrinkage hole under the action of the elastic piece, and a shrinkage gap is reserved between every two adjacent slip flaps; the contraction gap is gradually reduced when the slip flap moves downwards along the inverted cone-shaped contraction hole so as to form an occlusion cavity for gripping the rod-shaped falling object.
2. The rod fishing tool of claim 1, wherein the inside walls of the slip segments are provided with a plurality of gripping teeth for gripping the rod, the plurality of gripping teeth being arranged in the axial direction of the slip segments.
3. A rod fish fishing tool as claimed in claim 2, wherein the teeth of the engagement teeth are angled towards the resilient member.
4. The rod fish fishing tool of any one of claims 1 to 3, wherein the slip segments comprise an upper constant diameter section and a lower reverse tapered section, the outer surface of the lower reverse tapered section engaging the inner surface of the reverse tapered bore.
5. The rod fish fishing tool of any one of claims 1 to 3, wherein the bottom end of the slip segments are provided with an escape chamfer to facilitate entry of the rod fish into the slip assembly.
6. The rod fish fishing tool of any one of claims 1 to 3, wherein the outer sleeve has a retaining step on its inner side wall, and the resilient member is arranged in compression between the retaining step and the slip assembly.
7. A rod fish fishing tool as claimed in claim 6, wherein the resilient member is a helical spring.
8. The rod fish fishing tool of any one of claims 1 to 3, wherein the outer casing comprises an upper and lower coupling connected to each other, the upper coupling being connected to an external pipe string, the lower coupling being provided at its bottom end with an elevator shoe for introducing the rod fish into the interior of the slip assembly.
9. The pin junk fishing tool of claim 8 wherein the guide shoe is a tapered guide channel having an inner side wall that is curved in an arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120392820.5U CN215595530U (en) | 2021-02-22 | 2021-02-22 | Fishing tool for rod-shaped falling objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120392820.5U CN215595530U (en) | 2021-02-22 | 2021-02-22 | Fishing tool for rod-shaped falling objects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215595530U true CN215595530U (en) | 2022-01-21 |
Family
ID=79869421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120392820.5U Active CN215595530U (en) | 2021-02-22 | 2021-02-22 | Fishing tool for rod-shaped falling objects |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215595530U (en) |
-
2021
- 2021-02-22 CN CN202120392820.5U patent/CN215595530U/en active Active
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