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A fishing structure for downhole instruments

A downhole instrument and body technology, which is applied in the field of fishing structures for downhole instruments, can solve problems such as inability to take out, multiple docking of downhole instruments, failure of docking between the fishing mechanism and downhole instruments, etc., and achieves simple structure, improved salvage success rate, and reliable The effect of docking

Active Publication Date: 2022-05-20
贵州航天凯山石油仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, during the salvage process of the instrument, it often occurred that the salvage mechanism and the downhole instrument could not be docked, resulting in the need for multiple docking and even the downhole instrument could not be taken out

Method used

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  • A fishing structure for downhole instruments

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Embodiment Construction

[0011] The present invention will be further described in detail through specific embodiments below, but these embodiments are only for illustration and do not limit the scope of the present invention.

[0012] Please refer to figure 1 , the fishing structure for downhole instruments of the present invention includes: a fishing body and a fishing joint, the front end of the fishing joint is provided with a slope at a first angle, the front end of the fishing body is provided with a slope at a second angle, and a righting device is installed on the front end of the fishing body. device, set slips at the variable diameter of the fishing joint.

[0013] In one embodiment, a plurality of slips are provided in the circumferential direction of the fishing body.

[0014] In one embodiment, the slips are evenly distributed in the circumferential direction of the fishing body.

[0015] In one embodiment, the number of slips is four.

[0016] In one embodiment, the first angle is 90 ...

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Abstract

The present disclosure relates to a fishing structure for downhole instruments, comprising: a fishing body and a fishing joint, the front end of the fishing joint is provided with an inclined surface at a first angle, and the front end of the fishing body is provided with an inclined plane at a second angle, which is installed on the front end of the fishing body. There is a centralizer, and slips are set at the variable diameter of the fishing joint. The invention has a simple structure, improves the fishing success rate of the downhole equipment, and can realize reliable docking between the fishing mechanism and the downhole equipment.

Description

technical field [0001] The invention relates to a fishing structure for downhole instruments. Background technique [0002] In oilfield testing work, some downhole instruments need to be placed downhole for a long time, and when they need to be taken out, they need to be lowered into a special fishing mechanism to fish out the instruments. In the previous instrument salvage process, it often occurred that the salvage mechanism and the downhole instrument could not be docked, resulting in the need for multiple docking and even the downhole instrument could not be taken out. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a fishing structure for downhole instruments, which improves the success rate of fishing for downhole instruments. [0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a fishing structure for downhole instruments, which is characteri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B31/12
Inventor 汪开义谢泰平冯贵洪
Owner 贵州航天凯山石油仪器有限公司
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