CN219262336U

CN219262336U - Casing damage underground long-acting packing device for petroleum exploitation

Info

Publication number: CN219262336U
Application number: CN202223104091.2U
Authority: CN
Inventors: 宁创; 李钢; 游家庆; 赵春雨; 蔡小军; 苏勇; 丁高翔; 张丽伟; 秦瑗; 高洒
Original assignee: Xi'an Dongxin Petroleum Machinery Co ltd
Current assignee: Xi'an Dongxin Petroleum Machinery Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-06-27
Anticipated expiration: 2032-11-22

Abstract

A sleeve damage well underground long-acting packing device for oil exploitation belongs to the oil exploitation field, its characterized in that: the device comprises a mechanical anti-jacking slip, a packer and a reverse check valve; the mechanical anti-jacking slips, the packer and the reverse check valve are fixedly connected in sequence from top to bottom. The existing packing device is improved, and the existing packing device comprises a mechanical anti-jacking slip, a packer and a reverse check valve, wherein anchoring is realized through the mechanical anti-jacking slip and the packer clamping teeth, and the reverse check valve is used for balancing the layer pressure when the plugging tool is salvaged, so that the plugging tool can be taken out smoothly; the underground long-acting packing device for the casing damage well in petroleum exploitation can quickly and efficiently pack the casing damage well, is convenient for extracting the packing device, has a simple structure, is easy to operate, and is suitable for popularization and application.

Description

Casing damage underground long-acting packing device for petroleum exploitation

Technical Field

The utility model belongs to the field of oil exploitation, and particularly relates to a casing damage underground long-acting packing device used in oil exploitation.

Background

In oil and gas production, because of damage to the casing in the well, downhole fluids are produced, affecting production, and often requiring formation production, it is desirable to temporarily or permanently isolate unused formations in the well. The existing common method is to lower the bridge plug, and salvage the bridge plug by using a salvage device or mill the bridge plug by using a milling cone when the seal layer is not needed. However, in actual production, the bridge plug salvaging failure rate is high, and cement pump trucks and water tank trucks are needed to be used in drilling and milling operations, so that the cost is high, and meanwhile, the waste liquid generated in the drilling and milling operations easily pollutes well sites, so that the treatment cost is high.

Disclosure of Invention

The utility model aims to solve the problems and provides a casing damage underground long-acting packing device which is convenient to operate and used for petroleum exploitation.

The utility model relates to a casing damage underground long-acting packing device used in petroleum exploitation, which comprises a mechanical anti-jacking slip, a packer and a reverse check valve; the mechanical anti-jacking slips, the packer and the reverse check valve are fixedly connected in sequence from top to bottom.

Further, the utility model relates to a casing damage underground long-acting packer device for petroleum exploitation, wherein the reverse check valve comprises a valve body and a screen pipe which are sequentially connected; a ball seat is arranged in the valve body; a spring is arranged below the ball seat; a steel ball is arranged between the ball seat and the spring; the steel ball is propped against the ball seat through a spring; a plurality of through holes are formed in the pipe body of the sieve pipe; and the tail end of the screen pipe is fixedly connected with a conical plug.

Furthermore, the through holes are uniformly distributed on the pipe body of the sieve tube at equal intervals.

Furthermore, the oil sealing threads are arranged at both ends of the anti-jacking slips and the packer and at the upper end of the reverse check valve; the anti-jacking slips, the packer and the reverse check valve are fixedly connected through petroleum threads.

The utility model relates to a sleeve damage underground long-acting packing device for petroleum exploitation, which is characterized in that the existing packing device is improved, and comprises a mechanical anti-jacking slip, a packer and a reverse check valve, wherein anchoring is realized through the mechanical anti-jacking slip and the packer clamping teeth, and the reverse check valve is used for balancing horizon pressure when a plugging tool is salvaged, so that the plugging tool can be taken out smoothly; the underground long-acting packing device for the casing damage well in petroleum exploitation can quickly and efficiently pack the casing damage well, is convenient for extracting the packing device, has a simple structure, is easy to operate, and is suitable for popularization and application.

Drawings

FIG. 1 is a schematic diagram of a casing damage downhole long-acting packer device for oil exploitation according to the embodiment;

FIG. 2 is a schematic diagram of the construction of a mechanical anti-jack slip according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a packer according to an embodiment of the utility model;

FIG. 4 is a schematic diagram of a reverse check valve according to an embodiment of the present utility model;

wherein, 1-mechanical anti-jack slips, 2-packer, 3-reverse check valve, 31-valve body, 32-screen pipe, 33-through hole, 34-ball seat, 35-steel ball, 36-spring.

Detailed Description

The following describes the casing damage well underground long-acting packer device used in petroleum exploitation in detail through the attached drawings and the embodiments.

The embodiment of the disclosure discloses a casing damage underground long-acting packer device for petroleum exploitation, which is shown in fig. 1, and comprises a mechanical anti-jacking slip 1, a packer 2 and a reverse check valve 3; the mechanical anti-jacking slip 1, the packer 2 and the reverse check valve 3 are fixedly connected in sequence from top to bottom. The two ends of the anti-jacking slip, the Y221 packer 2 and the upper end of the reverse check valve 3 are respectively provided with special petroleum sealing threads, and the anti-jacking slip, the Y221 packer 2 and the reverse check valve 3 are connected together through petroleum threads.

The mechanical anti-jacking slip 1 is shown in fig. 2 in the embodiment of the disclosure; the type 2 of the packer is Y221 packer 2, the performance of the packer 2 is stable, the setting, the deblocking and the extracting performances are reliable, the problem of difficult salvage does not exist, and the structure of the packer 2 is shown in figure 3; the structure of the reverse check valve 3 is shown in fig. 4.

In the disclosed embodiment, the reverse uniflow valve 3 comprises a valve body 31 and a screen 32 which are sequentially connected; a ball seat 34 is arranged in the valve body 31; a steel ball 35 is arranged on the ball seat 34; a spring 36 is arranged below the ball seat 34; a steel ball 35 is arranged between the ball seat 34 and the spring 36; the steel ball 35 is propped against the ball seat 34 through a spring 36; the tube body of the sieve tube 32 is provided with a plurality of through holes 33; the tail end of the screen pipe 32 is fixedly connected with a conical plug; the through holes 33 are uniformly distributed on the pipe body of the sieve tube 32 at equal intervals. When the valve body 31 is fed with liquid from the upper end, the steel ball 35 presses the spring 36, and the uniflow valve is opened to realize internal and external pressure balance; during reverse flushing, fluid enters from below and is forced against ball seat 34 by the force of spring 36 and the pressure of the fluid below to effect a seal.

When the casing damage underground long-acting packer device for oil exploitation is used, a tool string consisting of the mechanical anti-jacking slips 1, the Y211 packer 2 and the reverse check valve 3 is lowered to the lower part of a production layer by a tubing string, and the casing damage section is arranged at the upper part of the casing damage section. After the well packer is lowered to the to-be-sealed position, the lowered tubing string is rotated to enable the Y221 packer 2 to be sealed, the tubing string is continuously rotated, the mechanical anti-jacking slips 1 are anchored, then the tubing string is lifted up to realize releasing, and the long-acting sealing device consisting of the mechanical anti-jacking slips 1, the Y221 packer 2 and the reverse check valve 3 is lifted up to realize lower sealing, so that the upper layer oil extraction can normally operate.

When the well is needed to be repaired, the foreign matters and sundries on the upper portion of the mechanical anti-jacking slip 1 are washed cleanly, the mechanical anti-jacking slip 1 is grabbed by using a fishing tool, then the mechanical anti-jacking slip 1 is lifted up to be separated, meanwhile, the Y221 packer 2 is unsealed, the long-acting packing device is provided, the wellhead structure is recovered, and normal well repair operation is carried out.

The utility model discloses an implement a sleeve losses well in pit long-term packing device for in oil development has important meaning to the production of the field sleeve losses well, and the sleeve losses well of each oil field in China is higher and higher at present, and the long-term packing device accident rate of ordinary use is high, seals the effect not good, can also frequently appear salvaging the problem not out simultaneously, can effectually solve this problem through the sleeve losses well in pit long-term packing device that this embodiment discloses in the oil development.

Claims

1. A sleeve damage well is long-term to seal up device in pit for oil development, its characterized in that: the device comprises a mechanical anti-jacking slip, a packer and a reverse check valve; the mechanical anti-jacking slips, the packer and the reverse check valve are fixedly connected in sequence from top to bottom.

2. The casing damage downhole long-acting packer device for use in oil recovery of claim 1, wherein: the reverse check valve comprises a valve body and a screen pipe which are connected in sequence;

a ball seat is arranged in the valve body; a spring is arranged below the ball seat; a steel ball is arranged between the ball seat and the spring; the steel ball is propped against the ball seat through a spring;

a plurality of through holes are formed in the pipe body of the sieve pipe;

and the tail end of the screen pipe is fixedly connected with a conical plug.

3. The casing damage downhole long-acting packer device for use in oil exploitation according to claim 2, wherein: the through holes are uniformly distributed on the pipe body of the sieve tube at equal intervals.

4. A casing damage downhole long-acting packer device for use in oil recovery according to claim 1 or 3, wherein: the two ends of the anti-jacking slips and the packer and the upper end of the reverse check valve are provided with petroleum sealing threads; the anti-jacking slips, the packer and the reverse check valve are fixedly connected through petroleum threads.