CN216894323U

CN216894323U - Hydraulic anchor slip

Info

Publication number: CN216894323U
Application number: CN202220293044.8U
Authority: CN
Inventors: 兰宏刚; 刘建利
Original assignee: Baoji Keyuan Petroleum Equipment Co ltd
Current assignee: Baoji Keyuan Petroleum Equipment Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-05
Anticipated expiration: 2032-02-14

Abstract

The utility model provides a hydraulic anchor slips, includes cylinder type body (1), be close to interior terminal surface one side on cylinder type body (1) and be equipped with annular seal groove (1-3), cylinder type body (1) outer terminal surface central authorities are equipped with U type groove (1-1), and the tank bottom in U type groove (1-1) is equipped with second counter bore (1-5), its characterized in that: the outer end face of the cylindrical body (1) is an arc face (1-2), a plurality of anchor teeth (2) are fixed on the arc face (1-2), and the anchor teeth (2) are uniformly distributed on two sides of the U-shaped groove (1-1). The utility model overcomes the defects of the prior art, effectively prevents the packer from moving upwards and ensures the orderly operation of subsequent work.

Description

Hydraulic anchor slip

Technical Field

The utility model belongs to the technical field of petroleum underground packers, and particularly relates to a hydraulic anchor slip.

Background

The packer is a downhole tool for packing various pipe columns, well bores and annular spaces between the pipe columns by using an elastic sealing element of the packer, and the hydraulic anchor is mainly used for fixing the packer in a sleeve after the packer is sealed so as to prevent the packer from jumping upwards due to gradual rise of bottom pressure. The hydraulic anchor prevents the packer seat from moving upwards after being sealed by embedding the anchor teeth of the hydraulic anchor slip into the inner wall of the sleeve, the contact surface of the existing hydraulic anchor slip and the inner wall of the sleeve is an inclined plane, the anchor teeth are fixed on the inclined plane, the hydraulic anchor slip moves towards the direction of the sleeve under the action of bottom hole pressure after the packer seat is sealed, the anchor teeth are embedded into the inner wall of the sleeve, however, because two edges of the inclined plane are firstly tightly abutted against the inner wall of the sleeve, a crescent gap is formed between the inclined plane and the sleeve wall, the protruding part of the anchor teeth can not be completely embedded into the inner wall of the sleeve, the wall grabbing force of the anchor teeth is insufficient, the packer is easy to move upwards at an operation site, the packer is unlocked, and subsequent work can not be carried out.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hydraulic anchor slip, which overcomes the defects of the prior art.

The technical scheme adopted by the utility model is as follows: the utility model provides a hydraulic anchor slips, includes cylinder type body, it is equipped with annular seal groove to be close to interior terminal surface one side on the cylinder type body, the outer terminal surface central authorities of cylinder type body are equipped with U type groove, and the tank bottom in U type groove is equipped with the second counter bore, the outer terminal surface of cylinder type body is the arc surface, be fixed with a plurality of anchor tooth on the arc surface, and the anchor tooth equipartition is in the both sides in U type groove.

The arc surface is provided with a first counter bore along the radial direction, the anchor teeth are inserted and fixed in the first counter bore, and the top of each anchor tooth protrudes out of the arc surface.

The anchor teeth are alloy anchor teeth, and the anchor teeth are welded and fixed with the first counter bores.

The anchor teeth are of cylindrical structures, the first counter bores and the arc surfaces have 15-degree inclination angles, so that the anchor teeth are installed in the first counter bores, and the tops of the anchor teeth form inclined planes with the high ends facing upwards.

Compared with the prior art, the utility model has the following beneficial effects:

the contact surface of the hydraulic anchor slip and the inner wall of the casing is designed into the adaptive arc surface, and the hydraulic anchor slip is completely contacted with the inner wall of the casing through the arc surface under the action of bottom hole pressure, so that a crescent gap existing in the conventional product is eliminated, the friction force between the hydraulic anchor slip and the inner wall of the casing is increased, the convex part of each anchor tooth can be completely embedded into the wall of the casing, the wall gripping force of each anchor tooth is improved, upward movement of a packer is effectively prevented, and sequential operation of subsequent work is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a cylindrical body according to the present invention;

FIG. 3 is a schematic cross-sectional view of a cylindrical body structure according to the present invention;

FIG. 4 is a schematic view of the anchor tooth structure of the present invention;

fig. 5 and 6 are schematic sectional views of the present invention in use.

Detailed Description

The present invention will be described in detail with reference to the accompanying fig. 1 to 6 and the detailed description thereof.

A hydraulic anchor slip comprises a cylindrical body 1, wherein an annular sealing groove 1-3 is formed in one side, close to an inner end face, of the cylindrical body 1, a U-shaped groove 1-1 is formed in the center of the outer end face of the cylindrical body 1, a second counter bore 1-5 is formed in the bottom of the U-shaped groove 1-1, the outer end face of the cylindrical body 1 is an arc face 1-2, a plurality of anchor teeth 2 are fixed on the arc face 1-2, and the anchor teeth 2 are evenly distributed on two sides of the U-shaped groove 1-1.

In one embodiment, a plurality of first counter bores 1-4 are radially arranged on the arc surface 1-2, the anchor teeth 2 are inserted and fixed in the first counter bores 1-4, and the top of the anchor teeth 2 protrudes out of the arc surface 1-2.

The anchor teeth 2 are preferably made of alloy, and the anchor teeth 2 are welded and fixed with the first counter bores 1-4.

In order to enable the anchor teeth to be smoothly embedded into the wall of the sleeve and provide enough wall grabbing force, the first counter bore 1-4 and the circular arc surface 1-2 have an inclination angle of 15 degrees, so that the anchor teeth 2 are installed in the first counter bore 1-4, and the top of the anchor teeth forms a high-end upward inclined surface 2-1.

When in use, the sealing ring sleeve 7 is sleeved in the annular sealing groove 1-3, the hydraulic anchor is arranged in the mounting hole on the outer wall of the hydraulic anchor body 3, the return spring 5 is arranged in the second counter bore 1-5, the hydraulic anchor is fixed with the hydraulic anchor body 3 through the fixing plate 4 arranged in the U-shaped groove 1-1, and one end of the return spring 5 is abutted against the fixing plate 4. After the packer seat is sealed, along with the gradual rise of the bottom hole pressure, the hydraulic anchor moves towards the direction of a well wall sleeve 6 under the action of the bottom hole pressure, so that the arc surface 1-2 is abutted against and completely contacted with the inner wall of the sleeve 6, and the top inclined surface 2-1 of the anchor tooth 2 is embedded into the inner wall of the sleeve 6, so that the friction force between the outer end surface of the cylindrical body 1 and the inner wall of the sleeve 6 is increased, the defect that a gap exists due to incomplete contact after the existing product slip body is abutted against the inner wall of the sleeve 6 is eliminated, the wall grabbing depth of the anchor tooth is increased, the wall grabbing capacity of the hydraulic anchor is improved, upward movement of the packer is effectively prevented, and the sequential operation is ensured.

It should be noted that the specification of the arc surface 1-2 must change with the specification of the casing 6, so that the arc surface 1-2 must be adapted to the inner wall of the casing 6, and the arc surface 1-2 can be ensured to be in contact with the inner wall of the casing 6 completely after abutting against the inner wall. The size of the arc surface 1-2 is preferably the arc surface concentric with the inner hole of the sleeve 6.

The above-mentioned embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the scope of the utility model, and therefore all equivalent variations made by the following claims should be included in the scope of the utility model.

Claims

1. The utility model provides a hydraulic anchor slips, includes cylinder type body (1), be close to interior terminal surface one side on cylinder type body (1) and be equipped with annular seal groove (1-3), cylinder type body (1) outer terminal surface central authorities are equipped with U type groove (1-1), and the tank bottom in U type groove (1-1) is equipped with second counter bore (1-5), its characterized in that: the outer end face of the cylindrical body (1) is an arc face (1-2), a plurality of anchor teeth (2) are fixed on the arc face (1-2), and the anchor teeth (2) are uniformly distributed on two sides of the U-shaped groove (1-1).

2. The hydraulic anchor slip of claim 1, wherein: the arc surface (1-2) is provided with a first counter bore (1-4) along the radial direction, the anchor tooth (2) is inserted and fixed in the first counter bore (1-4), and the top of the anchor tooth (2) protrudes out of the arc surface (1-2).

3. The hydraulic anchor slip of claim 2, wherein: the anchor teeth (2) are alloy anchor teeth, and the anchor teeth (2) are welded and fixed with the first counter bores (1-4).

4. A hydraulic anchor slip according to claim 2 or 3, wherein: the anchor tooth (2) is of a cylindrical structure, and the first counter bore (1-4) and the arc surface (1-2) have an inclination angle of 15 degrees, so that the anchor tooth (2) is installed in the first counter bore (1-4), and the top of the anchor tooth forms a high-end upward inclined surface (2-1).