Anti-extrusion device for cable for well repair

Abstract

The utility model provides a cable anti-squeezing device for well repair, which comprises a centering piece, the centering piece comprises a middle part, a first hollow space is formed on the inner wall of the middle part, an oil pipe penetrates through the first hollow space of the middle part, and the inner diameter of the middle part is gradually increased in the vertical direction from top to bottom. According to the utility model, the problem of collision and damage of the cable in the well entering process can be solved, and the production cycle of an electric pump well is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of crude oil exploitation, and in particular relates to a cable anti-squeezing device for well repairing. Background Art

[0002] As the development of oil reservoirs continues to deepen, the number of machine-produced wells has gradually increased, and the number of electric pump wells has also increased. At present, the process of electric pumps entering the well has the following problems: during the process of electric pumps entering the well, the oil pipe and the cable are usually entered into the well simultaneously. The oil pipe is often unable to be centered, resulting in the phenomenon of sticking to the wall during the lowering of the oil pipe. During the process of lowering the cable, the oil pipe is prone to collision with the cable, causing damage to the cable, causing the cable to penetrate the lying well, seriously affecting the production cycle of the electric pump well, increasing the frequency of pump inspection operations, and increasing operating costs. Therefore, it is urgent to develop a cable anti-squeezing device for well repair to solve the above problems, so as to solve the problem of cable collision damage during the well entry process. Utility Model Content

[0003] One purpose of the utility model is to provide a cable anti-squeezing device for well repairing, so as to solve the problem of cable collision damage during the process of entering the well and prolong the production cycle of the electric pump well.

[0004] According to the utility model, a cable anti-squeezing device for well repair is provided, including a centering piece, the centering piece includes a center part, the inner wall of the center part forms a first hollow space, the oil pipe passes through the first hollow space of the center part, and in the vertical direction from top to bottom, the inner diameter of the center part is constructed to gradually increase.

[0005] In a preferred embodiment, the centering portion includes a first centering sub-portion and a second centering sub-portion that are relatively arranged, and the centering member also includes a flat plate portion that is integrally formed with the first centering sub-portion and the second centering sub-portion, and the centering portion protrudes from the upper surface of the flat plate portion. The cable anti-crushing device for well repair also includes a main body, and the lower surface of the flat plate portion is in contact with the upper surface of the main body and is connected by a threaded member.

[0006] In a preferred embodiment, the main body has a second hollow space in communication with the first hollow space, and the oil pipe passes through the second hollow space of the main body.

[0007] In a preferred embodiment, a vertical groove connected to the second hollow space is formed on the side of the main body, and an opening connected to the vertical groove in the central portion is formed above the vertical groove. A roller is provided inside the vertical groove, and the surface of the roller contacts the cable for guiding the cable.

[0008] In a preferred embodiment, the roller includes a roller body, a first frustum portion and a second frustum portion, the first frustum portion and the second frustum portion are respectively arranged on both sides of the roller body, and the surfaces of the first frustum portion and the second frustum portion are respectively abutted against and fixed to the inner wall surface of the vertical groove.

[0009] In a preferred embodiment, the surface of the roller body is configured as an arc surface and contacts the cable.

[0010] In a preferred embodiment, the bottom of the main body is constructed in a plate shape, which is surface-to-surface in contact with the flange of the well repair blowout preventer and is fixed by screws.

[0011] In a preferred embodiment, the roller is made of rubber.

[0012] The utility model has at least the following technical effects:

[0013] According to the utility model, a centering piece is provided and the centering piece includes a centering portion. Since the inner wall of the centering portion forms a first hollow space, the oil pipe passes through the first hollow space of the centering portion. In the vertical direction from top to bottom, the inner diameter of the centering portion is constructed to gradually increase, which can prevent the oil pipe from squeezing the cable on the inner wall surface of the pipe, thereby preventing the cable from penetrating the lying well, reducing the frequency of pump inspection operations, reducing operating costs, and extending the production cycle of the electric pump well. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The top view of the structure of the cable anti-squeezing device for well repairing according to one embodiment of the utility model is schematically shown;

[0015] Figure 2 The axial structure diagram of the cable anti-squeezing device for well repairing according to one embodiment of the utility model is schematically shown.

[0016] In the present application, all drawings are schematic drawings, which are only used to illustrate the principles of the present utility model and are not drawn according to the actual scale. DETAILED DESCRIPTION

[0017] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1 to Figure 2 As shown, the cable anti-crushing device 100 for well repairing described in the utility model includes a centering piece 1, and the centering piece 1 includes a centering portion 11. The inner wall of the centering portion 11 forms a first hollow space, and the oil pipe 2 passes through the first hollow space of the centering portion. In the vertical direction from top to bottom, the inner diameter of the centering portion 11 is constructed to gradually increase, thereby gradually moving away from the oil pipe 2.

[0020] According to the utility model, the inner wall of the center portion 11 forms a first hollow space, and the oil pipe 2 passes through the first hollow space of the center portion, and in the vertical direction from top to bottom, the inner diameter of the center portion 11 is configured to gradually increase, so as to gradually move away from the oil pipe 2. The top inner wall of the center portion 11 is closest to the outer surface of the oil pipe 2 (for example, 120 mm), which can reduce the distance between the inner wall of the conventional pipeline and the oil pipe (for example, 60 mm), so that it can play a better centering role in the initial lowering process of the oil pipe. As the oil pipe extends downward in the vertical direction, the inner wall surface of the center portion is configured to gradually move away from the oil pipe 2, and the bottom inner wall of the center portion is farthest from the outer surface of the oil pipe and has the same inner diameter as the conventional pipe. After the top inner wall centers the oil pipe 2, it can prevent the oil pipe 2 from squeezing the cable on the inner wall surface of the pipe, thereby preventing the cable from penetrating the lying well, reducing the frequency of pump inspection operations, reducing operating costs, and extending the production cycle of the electric pump well.

[0021] In one or more embodiments, the centering portion 11 includes a first centering sub-portion 111 and a second centering sub-portion 112 that are relatively arranged, and the centering member 1 also includes a flat plate portion 12 that is integrally formed with the first centering sub-portion 111 and the second centering sub-portion 112 respectively, and the centering portion 11 protrudes from the upper surface of the flat plate portion 12, and the cable anti-crushing device 100 for well repairing also includes a main body 3, and the lower surface of the flat plate portion 12 contacts the upper surface of the main body 3 and is connected by a threaded member, so that the first centering sub-portion 111 and the second centering sub-portion 112 can be rotated relative to the main body 3 to achieve end face abutment of the two, thereby forming a first hollow space.

[0022] According to the utility model, the first centering section 111 and the second centering section 112 can be rotated relative to the main body 3 to achieve abutment of the end faces of the two, thereby forming a first hollow space. When it is necessary to center the oil pipe 2, the first centering section 111 and the second centering section 112 can be rotated respectively to achieve abutment of the end faces of the two, so that the centering section 11 has a centering function. After the well is completed, when it is necessary to withdraw the oil pipe 2, the first centering section 111 and the second centering section 112 can be rotated in the opposite direction, so that the centering section 11 no longer has a centering function, so as to facilitate the withdrawal of the oil pipe 2.

[0023] In one or more embodiments, the main body 3 has a second hollow space therein that is vertically connected to the first hollow space, and the oil pipe passes through the second hollow space of the main body 3 .

[0024] In one or more embodiments, a vertical groove 4 connected to the second hollow space is opened on the side of the main body 3, and an opening connected to the vertical groove 4 in the vertical direction is formed above the vertical groove 4 in the central portion 11. A roller 5 is arranged inside the vertical groove 4. The surface of the roller 5 contacts the cable for guiding the cable. The opening and the vertical groove 4 can serve as a channel for lowering the cable. When the electric pump well pipe string is put into the well, the cable passes through the roller 5 and slides into the well through the channel formed by the opening and the vertical groove 4, thereby further effectively avoiding damage to the cable caused by hard collision.

[0025] In one or more embodiments, the roller 5 includes a roller body 51, a first frustum portion 52 and a second frustum portion 53, the first frustum portion 51 and the second frustum portion 52 are respectively arranged on both sides of the roller body 51, and the surfaces of the first frustum portion 51 and the second frustum portion 52 are respectively abutted against and fixed to the inner wall surface of the vertical groove.

[0026] In one or more embodiments, the surface of the roller body 51 is configured as an arc surface and contacts the cable.

[0027] In one or more embodiments, the bottom of the main body 3 is configured in a plate shape, which is in surface contact with the flange 7 of the workover blowout preventer and is fixed by screws.

[0028] In one or more embodiments, the roller 5 is made of rubber material, which can reduce the hard loss of the cable. The rubber roller can reduce the friction between the cable and the roller 5 and help the cable enter the well.

[0029] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cable crush prevention device for well repair, characterized in that: The central piece includes a central portion, an inner wall of the central portion forms a first hollow space, an oil pipe passes through the first hollow space of the central portion, and an inner diameter of the central portion is configured to gradually increase in a vertical direction from top to bottom.

2. The cable crush prevention device for well repairing according to claim 1, characterized in that: The centering portion includes a first centering sub-portion and a second centering sub-portion which are arranged opposite to each other, and the centering member also includes a flat plate portion which is integrally formed with the first centering sub-portion and the second centering sub-portion, and the centering portion protrudes from the upper surface of the flat plate portion. The cable anti-crushing device for well repair also includes a main body, and the lower surface of the flat plate portion is in contact with the upper surface of the main body and is connected through a screw member.

3. The cable crush prevention device for well repairing according to claim 2, characterized in that: The main body has a second hollow space in communication with the first hollow space, and the oil pipe passes through the second hollow space of the main body.

4. The cable crush prevention device for well repairing according to claim 3, characterized in that: A vertical groove connected to the second hollow space is formed on the side of the main body, and an opening connected to the vertical groove in the central part is formed above the vertical groove. A roller is arranged inside the vertical groove, and the surface of the roller contacts the cable for guiding the cable.

5. The cable crush prevention device for well repairing according to claim 4, characterized in that: The roller includes a roller body, a first frustum portion and a second frustum portion, the first frustum portion and the second frustum portion are respectively arranged on both sides of the roller body, and the surfaces of the first frustum portion and the second frustum portion are respectively abutted against and fixed to the inner wall surface of the vertical groove.

6. The cable crush prevention device for well repairing according to claim 5, characterized in that: The surface of the roller body is configured as an arc surface and contacts the cable.

7. The cable crush prevention device for well repairing according to claim 2, characterized in that: The bottom of the main body is constructed in a plate shape, which is in surface contact with the flange of the well repair blowout preventer and is fixed by screws.

8. The cable crush prevention device for well repairing according to claim 4, characterized in that: The roller is made of rubber material.

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