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Fishing tool and fishing method

A technique for salvaging tools and shells, which is applied to the field of salvage of falling objects in oilfield wells, can solve the problems of increased operation cycle, increased operation cost, single use, etc., and achieves the effects of simple construction, low cost, and avoidance of ineffective work.

Active Publication Date: 2018-03-13
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are many downhole fishing tools in oilfields with different structures and different uses, but the general purpose is single, and only one kind of downhole salvage can be completed. Wheels, short-length pipe rods, packers, and tubular tools, etc. Sometimes it is necessary to use different tools to repeatedly fish various falling objects in the well, resulting in increased operating cycle and increased operating costs.

Method used

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Embodiment Construction

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0024] Such as figure 1 As shown, the fishing tool 100 provided by the present invention includes a casing 1 with an open bottom, and the lower part of the casing 1 is provided with an elastic fishing claw portion 2 arranged along the circumference of the casing 1 and capable of opening and closing radially along the casing 1. The opening and closing control line 3 surrounding the elastic claw part 2 is pierced inside the elastic claw part. The free end of the opening and closing control line 3 goes upward along the shell 1 and passes through the top of the shell 1 and the first The cable (the prior art, not shown in the figure) is connected, and the radial opening and closing of the elastic fishing claw part 2 is realized by pul...

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Abstract

The invention discloses a salvaging tool and a salvaging method. The salvaging tool comprises a housing with an opening in bottom, wherein the lower part of the housing is provided with an elastic salvaging claw part which is arranged in a circumferential direction of the housing and capable of opening and closing in a radial direction of the housing; an opening-closing control line which surrounds in the circumferential direction of the elastic salvaging claw part is arranged on the inner part of the elastic salvaging claw part in a penetration mode; a free end of the opening-closing control line is upward along the housing and penetrates through the top of the housing; and the top of the housing is provided with a cable connecting structure. The salvaging tool and the salvaging method disclosed by the invention can realize salvaging various different litters in a salvaging well, so that operation time is saved, construction is simple and cost is low.

Description

technical field [0001] The invention relates to the technique of fishing for downhole objects in an oil field, in particular to a multifunctional fishing tool and a fishing method capable of retrieving various downhole objects. Background technique [0002] At present, there are many downhole fishing tools in oilfields with different structures and different uses, but the general purpose is single, and only one kind of downhole salvage can be completed. Sometimes it is necessary to use different tools to repeatedly salvage a variety of downhole objects, such as reels, short-length pipe rods, packers, and tubular tools, which will increase the operation cycle and increase the operation cost. [0003] Therefore, the inventor proposes a fishing tool and a fishing method to overcome the defects of the prior art by virtue of years of experience and practice in related industries. Contents of the invention [0004] The object of the present invention is to provide a fishing too...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B31/12
CPCE21B31/12
Inventor 张滕范加兴张德海孙振宇许俊岩赵吉成韩宗正李红爽杨昕李君张颖徐宝珠王谦翔刘国震张俊杰
Owner PETROCHINA CO LTD
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