CN109798082B

CN109798082B - Fishing tool

Info

Publication number: CN109798082B
Application number: CN201811205072.4A
Authority: CN
Inventors: 阿里木江·司迪克; 张勇; 刘海龙; 孙新; 杨新克; 蒋建华; 张楠; 赵云峰; 王柳斌
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2018-10-16
Filing date: 2018-10-16
Publication date: 2023-10-27
Anticipated expiration: 2038-10-16
Also published as: CN109798082A

Abstract

The application provides a fishing tool, comprising: an outer cylinder; the connector at least partially penetrates through the outer barrel, and a first cavity is formed between the connector and the outer barrel; the inner cylinder is arranged in the cavity of the joint in a penetrating way and is provided with an upper cavity and a lower cavity which are arranged at intervals, and the inner cylinder is provided with a first position for communicating the upper cavity with the lower cavity and a second position for communicating the upper cavity with the first cavity; the connecting part is arranged below the joint and is used for connecting the salvaged piece; the upper cavity is used for inputting liquid, the first cavity is used for outputting liquid to flush the periphery of the salvaged piece, and the lower cavity is used for outputting liquid to flush the upper part of the salvaged piece. According to the technical scheme provided by the application, the problem that fishing of the underground fish in the prior art is not easy to succeed can be solved.

Description

Fishing tool

Technical Field

The application relates to the technical field of petroleum equipment, in particular to a fishing tool.

Background

In the oilfield operation process, the conditions of breaking or tripping of the downhole tool, clamping of part of the tubular column and the like can prevent normal construction of the oil well, and the tool falling into the well is also called as a "fish" by industry personnel. In the process of fishing the fish, when the fish is seriously piled up by fracturing sand or stratum silt, the dirt around the fish cannot be washed cleanly by adopting a conventional sand washing and fishing tool, so that the fishing is unsuccessful.

Disclosure of Invention

The application provides a fishing tool, which solves the problem that in the prior art, fishing of a down-hole fish is not easy to succeed.

In order to solve the above problems, the present application provides a fishing tool, comprising: an outer cylinder; the connector at least partially penetrates through the outer barrel, and a first cavity is formed between the connector and the outer barrel; the inner cylinder is arranged in the cavity of the joint in a penetrating way and is provided with an upper cavity and a lower cavity which are arranged at intervals, and the inner cylinder is provided with a first position for communicating the upper cavity with the lower cavity and a second position for communicating the upper cavity with the first cavity; the connecting part is arranged below the joint and is used for connecting the salvaged piece; the upper cavity is used for inputting liquid, the first cavity is used for outputting liquid to flush the periphery of the salvaged piece, and the lower cavity is used for outputting liquid to flush the upper part of the salvaged piece.

Further, when the inner cylinder is positioned at the first position, a second cavity is arranged between the inner cylinder and the connector, the upper cavity is communicated with the lower cavity through the second cavity, and the upper cavity is disconnected with the first cavity; the joint is provided with a diversion hole, when the inner barrel is positioned at the second position, the second cavity is closed, and the upper cavity is communicated with the first cavity through the diversion hole.

Further, the side wall of the inner cylinder is provided with a first through hole and a second through hole, the first through hole is communicated with the upper cavity, the second through hole is communicated with the lower cavity, and when the inner cylinder is located at the first position, the first through hole and the second through hole are communicated with the second cavity.

Further, the outer side of the inner barrel is provided with a first step, the inner side of the joint is provided with a second step, and when the inner barrel is positioned at the second position, the first step is matched with the second step to keep the inner barrel at the second position.

Further, the fishing tool also includes a connector that is threaded over the connector and the inner barrel to hold the inner barrel in the first position when the inner barrel is in the first position, the connector being disconnected under predetermined conditions to allow the inner barrel to move away from the first position.

Further, the first cavity is an annular cavity, the fishing tool further comprises an annular spacer, the annular spacer is arranged in the first cavity, and a plurality of diversion trenches are formed in the annular spacer along the circumferential direction.

Further, the connecting portion includes: the elastic claw is sleeved on the inner cylinder and has a contracted state and an expanded state, and the elastic claw can be connected with the salvaged piece when being in the expanded state; the protective sleeve is movably arranged in the outer cylinder, and the elastic claw part penetrates through the protective sleeve.

Further, the fishing tool further comprises: the conical head is arranged at one end of the inner cylinder far away from the joint, and can be abutted with the inner side of the elastic claw to open the elastic claw.

Further, the connecting portion further includes: and one end of the elastic piece is abutted with the end part of the joint, and the other end of the elastic piece is abutted with the protective sleeve.

Further, the elastic claw is provided with a first end and a second end which are opposite, the first end is penetrated in the protective sleeve, the elastic claw is multiple, and the second ends of the elastic claws can be close to or far away from each other.

By applying the technical scheme of the application, the first cavity is arranged between the connector of the fishing tool and the outer cylinder, the upper cavity and the lower cavity are arranged in the inner cylinder, when the fishing tool is used, the liquid output by the lower cavity can be used for flushing dirt on the upper part of the fish (the salvaged piece), and then the connecting part is used for connecting with the fish for salvaging. If the resistance is large and the fish can not be lifted, the upper cavity of the inner barrel is communicated with the first cavity, so that the dirt on the periphery of the fish is washed by the liquid output by the first cavity, the resistance of the dirt to the fish can be reduced, and the fish can be lifted easily. Therefore, the technical scheme of the application can improve the success rate of fishing the fish.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 illustrates a schematic view of a fishing tool provided by an embodiment of the present application;

FIG. 2 shows another schematic view of the fishing tool of FIG. 1;

FIG. 3 shows yet another schematic of the fishing tool of FIG. 1.

Wherein the above figures include the following reference numerals:

10. an outer cylinder; 11. a first cavity; 20. a joint; 21. a deflector aperture; 22. a second step; 30. an inner cylinder; 31. an upper cavity; 32. a lower cavity; 33. a second cavity; 34. a first through hole; 35. a second through hole; 36. a first step; 40. a connection part; 41. an elastic claw; 42. a protective sleeve; 50. a connecting piece; 60. an annular spacer; 61. a diversion trench; 70. a conical head; 80. an elastic member.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1-3, an embodiment of the present application provides a fishing tool comprising: an outer cylinder 10; a joint 20, the joint 20 is at least partially penetrated in the outer cylinder 10, and a first cavity 11 is arranged between the joint 20 and the outer cylinder 10; the inner cylinder 30 is arranged in the cavity of the joint 20 in a penetrating way, the inner cylinder 30 is provided with an upper cavity 31 and a lower cavity 32 which are arranged at intervals, and the inner cylinder 30 is provided with a first position for communicating the upper cavity 31 with the lower cavity 32 and a second position for communicating the upper cavity 31 with the first cavity 11; a connecting portion 40 disposed below the joint 20, the connecting portion 40 being used for connecting the salvaged pieces; wherein, the upper cavity 31 is used for inputting liquid, the first cavity 11 is used for outputting liquid to wash the periphery of the salvaged piece, and the lower cavity 32 is used for outputting liquid to wash the upper part of the salvaged piece.

By applying the technical scheme of the embodiment, the first cavity 11 is arranged between the connector 20 of the fishing tool and the outer barrel 10, and the upper cavity 31 and the lower cavity 32 are arranged in the inner barrel 30, when the fishing tool is used, the liquid output by the lower cavity 32 can be used for flushing dirt such as sediment on the upper part of the fish (the salvaged piece), and then the connecting part 40 is used for connecting with the fish for salvaging. If the dirt resistance is large and the fish cannot be lifted, the upper cavity 31 of the inner barrel 30 can be communicated with the first cavity 11 to wash the dirt on the periphery of the fish through the liquid output by the first cavity 11, so that the resistance of the dirt to the fish can be reduced, and the fish can be lifted easily. Therefore, the success rate of fishing the fish can be improved through the technical scheme of the embodiment.

In this embodiment, when the inner cylinder 30 is located at the first position, a second cavity 33 is provided between the inner cylinder 30 and the connector 20, the upper cavity 31 and the lower cavity 32 are communicated through the second cavity 33, and the upper cavity 31 is disconnected from the first cavity 11; the adapter 20 has a deflector aperture 21, such as shown in fig. 1. When the inner cylinder 30 is in the second position, the second chamber 33 is closed, and the upper chamber 31 communicates with the first chamber 11 through the deflector hole 21. In this way, when the inner cylinder 30 is in the first position, the upper cavity 31 and the lower cavity 32 can be communicated through the second cavity 33, so that the liquid can be injected to the upper part of the fish, and when the inner cylinder 30 is in the second position, the upper cavity 31 and the first cavity 11 can be communicated through the diversion hole 21, so that the liquid can be injected to the periphery of the fish, for example, as shown in fig. 2. As shown in fig. 1, a seal ring is provided between the outer tube 10 and the inner tube 30 in the up-down direction of the deflector hole 21 to improve the sealing effect.

Specifically, the side wall of the inner cylinder 30 is provided with a first through hole 34 and a second through hole 35, the first through hole 34 is communicated with the upper cavity 31, the second through hole 35 is communicated with the lower cavity 32, and when the inner cylinder 30 is located at the first position, the first through hole 34 and the second through hole 35 are both communicated with the second cavity 33. Communication between the upper chamber 31 and the lower chamber 32 is facilitated by providing the first through hole 34 and the second through hole 35. In the present embodiment, the second cavity 33 is an annular cavity.

In this embodiment, the outer side of the inner barrel 30 has a first step 36 and the inner side of the adapter 20 has a second step 22, the first step 36 and the second step 22 being in a stop fit to retain the inner barrel 30 in the second position when the inner barrel 30 is in the second position. This may increase the reliability of the fishing tool.

In this embodiment, the fishing tool further includes a connector 50, the connector 50 being disposed through the connector 20 and the inner barrel 30 to retain the inner barrel 30 in the first position when the inner barrel 30 is in the first position, the connector 50 being disconnected under predetermined conditions to allow the inner barrel 30 to move from the first position. In the initial state of the fishing tool, the inner barrel 30 is in the first position and the connector 50 is in the intact state. When the fish cannot be lifted, the pulling force of the lifting joint 20 is increased, and when the pulling force is greater than a certain value, the connecting piece 50 is disconnected under the action of the shearing force, and at this time, the inner cylinder 30 can move to the second position relative to the outer cylinder 10, so that the upper cavity 31 is communicated with the first cavity 11.

In this embodiment, the first cavity 11 is an annular cavity, and the fishing tool further includes an annular spacer 60 disposed in the first cavity 11, where the annular spacer 60 is provided with a plurality of guide grooves 61 along a circumferential direction. Thus, the liquid can only flow downwards through the diversion trench 61, and the flow speed of the liquid can be increased by arranging the diversion trench 61, so that the flushing effect on dirt is improved. In this embodiment, the annular spacer 60 is located below the joint 20. In the present embodiment, the annular spacer 60 and the outer cylinder 10 may be provided as an integrally molded structure.

In the present embodiment, the connection portion 40 includes: an elastic claw 41 sleeved on the inner barrel 30, wherein the elastic claw 41 has a contracted state and an expanded state, and the elastic claw 41 can be connected with the salvaged piece when being in the expanded state; a protective sheath 42 movably disposed in the outer cylinder 10, and an elastic claw 41 partially penetrating the protective sheath 42. The elastic claw 41 is convenient to be connected with the fish to salvage the fish, and the protective sleeve 42 can prevent the elastic claw 41 from being too much opened to be damaged.

In this embodiment, the fishing tool further comprises: the conical head 70 is provided at an end of the inner tube 30 away from the joint 20, and the conical head 70 can abut against the inner side of the elastic claw 41 to expand the elastic claw 41. Since the conical head 70 has a conical surface, the conical surface can spread the elastic claws 41 apart when the elastic claws 41 move downward relative to the conical head 70.

In the present embodiment, the connection portion 40 further includes: and an elastic member 80, wherein one end of the elastic member 80 abuts against the end of the joint 20, and the other end of the elastic member 80 abuts against the protective sheath 42. A force may be applied to the connection part 40 by the elastic member 80 so as to facilitate connection of the connection part 40 with the fish.

Specifically, the elastic claws 41 have opposite first ends and second ends, the first ends are provided in the protective cover 42 in a penetrating manner, the elastic claws 41 are plural, and the second ends of the plural elastic claws 41 can be moved toward or away from each other. In use, the second ends of the elastic claws 41 can extend into the cavity of the fish, and the second ends of the elastic claws 41 are far away from each other and can abut against the inner wall of the fish to be connected with the fish. The second ends of the plurality of resilient fingers 41 are brought closer together to disengage from the fish, as shown for example in figure 3.

For ease of understanding, one specific embodiment of the present solution is described below.

When the fishing tool is in a fishing state (as shown in fig. 1), liquid can enter the lower cavity through an annulus (a second cavity) between the central tube and the joint from a liquid outlet hole of the upper cavity of the central tube (inner tube), finally, the liquid is ejected from an outlet at the lower part of the central tube to wash dirt at the upper part of the fish, then, the fishing tool is lowered until the elastic claw enters the inner cavity of the fish, the joint is lifted up, and the conical head supports the elastic claw to fix and grasp the fish for fishing operation.

Further, if the fish cannot move, the lifting load of the connector is increased to the stretch-breaking shear pin (connecting piece), the connector moves upwards to expose the diversion hole, meanwhile, an annulus between the central tube and the connector is closed, the upper cavity of the central tube is not communicated with the lower cavity, at the moment, the fishing tool is in a flushing state (shown in fig. 2), the injected liquid of the upper cavity is ejected from the protective sleeve through the diversion hole, and the connector is lifted up to be fished after dirt around the fish is sufficiently cleaned.

Further, if the fishing is not successful, the joint is lowered to enable the track pin on the joint to move to the inflection point of the L-shaped groove of the central tube, then the rotary joint enables the track pin to enter the circumferential groove of the L-shaped groove, the elastic claw is separated from the conical head, the fishing tool is in a release state (shown in fig. 3) at the moment, then the joint is lifted up, the elastic claw is contracted to enable the fishing tool to be lifted up, and the fishing tool can be replaced or other measures can be taken for processing.

The technical scheme of the application effectively solves the problem that in the prior art, the conventional sand washing and salvaging tool cannot wash the dirt around the fish cleanly, so that the salvaging is unsuccessful because the fish is seriously piled up by fracturing sand or stratum silt.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

Claims

1. A fishing tool, comprising:

an outer cylinder (10);

a joint (20), the joint (20) is at least partially penetrated in the outer cylinder (10), and a first cavity (11) is arranged between the joint (20) and the outer cylinder (10);

an inner cylinder (30) penetrating through the cavity of the joint (20), wherein the inner cylinder (30) is provided with an upper cavity (31) and a lower cavity (32) which are arranged at intervals, and the inner cylinder (30) is provided with a first position for communicating the upper cavity (31) with the lower cavity (32) and a second position for communicating the upper cavity (31) with the first cavity (11);

a connecting part (40) arranged below the joint (20), wherein the connecting part (40) is used for connecting the salvaged piece;

wherein the upper cavity (31) is used for inputting liquid, the first cavity (11) is used for outputting liquid to flush the periphery of the salvaged piece, and the lower cavity (32) is used for outputting liquid to flush the upper part of the salvaged piece;

when the inner cylinder (30) is positioned at the first position, a second cavity (33) is arranged between the inner cylinder (30) and the joint (20), the upper cavity (31) and the lower cavity (32) are communicated through the second cavity (33), and the upper cavity (31) is disconnected with the first cavity (11); the joint (20) is provided with a diversion hole (21), when the inner cylinder (30) is positioned at the second position, the second cavity (33) is closed, and the upper cavity (31) is communicated with the first cavity (11) through the diversion hole (21);

a first through hole (34) and a second through hole (35) are formed in the side wall of the inner cylinder (30), the first through hole (34) is communicated with the upper cavity (31), the second through hole (35) is communicated with the lower cavity (32), and when the inner cylinder (30) is located at the first position, the first through hole (34) and the second through hole (35) are both communicated with the second cavity (33);

the outer side of the inner cylinder (30) is provided with a first step (36), the inner side of the joint (20) is provided with a second step (22), and when the inner cylinder (30) is positioned at the second position, the first step (36) is in stop fit with the second step (22) so as to keep the inner cylinder (30) at the second position;

the connection part (40) includes: an elastic claw (41) sleeved on the inner cylinder (30), wherein the elastic claw (41) has a contracted state and an expanded state, and the elastic claw (41) can be connected with the salvaged piece when being in the expanded state; a protective sleeve (42) movably arranged in the outer cylinder (10), wherein the elastic claw (41) is partially penetrated in the protective sleeve (42); an elastic member (80), wherein one end of the elastic member (80) is abutted against the end of the joint (20), and the other end of the elastic member (80) is abutted against the protective sleeve (42);

the fishing tool further includes: and a conical head (70) arranged at one end of the inner cylinder (30) far away from the joint (20), wherein the conical head (70) can be abutted against the inner side of the elastic claw (41) so as to open the elastic claw (41).

2. A fishing tool as claimed in claim 1, further comprising a connector (50), the connector (50) being arranged to pass over the connector (20) and the inner barrel (30) to retain the inner barrel (30) in the first position when the inner barrel (30) is in the first position, the connector (50) being broken under predetermined conditions to move the inner barrel (30) away from the first position.

3. Fishing tool according to claim 1, characterized in that the first cavity (11) is an annular cavity, the fishing tool further comprising an annular spacer (60) arranged in the first cavity (11), the annular spacer (60) being provided with a plurality of guide grooves (61) in the circumferential direction.

4. A fishing tool as claimed in claim 1, wherein the resilient claw (41) has opposed first and second ends, the first end being disposed through the protective sheath (42), the resilient claw (41) being plural, the second ends of the plurality of resilient claws (41) being capable of being moved toward and away from each other.