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In-tube instrument fisher

An overshot and instrument technology, applied in wellbore/well components, earth-moving drilling, etc., can solve problems such as low success rate of salvage and influence on downhole safety, so as to achieve smooth salvage process, reduce the possibility of jamming, and ensure salvage reliability. Effect

Inactive Publication Date: 2013-12-18
中国石油集团川庆钻探工程有限公司长庆钻井总公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner diameter of some drilling tool conversion joints is 58mm, and the mouth of the fishing tool slip ring is not processed into a slope and scratches the joints of the drilling tool, resulting in a low fishing success rate and seriously affecting downhole safety.

Method used

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  • In-tube instrument fisher

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Embodiment Construction

[0016] Such as figure 1 As shown in the structure diagram of the instrument overshot in the pipe, it at least includes an overshot body 2 and an overshot guide shoe 1 that is threadedly connected to the overshot body 2 lower end, and the overshot body 2 is also fixed with a fishing head clamping mechanism.

[0017] The catch mechanism of the fishing head is composed of the fishing claw, the claw pin 4, the fishing bolt 5, and the spring 6. The fishing claw is divided into two claw bodies 3 on the left and right, and the claw bodies 3 on the left and right are both inside The bottom has a barb 7, and the inner middle of the claw body 3 has a connecting protrusion 8, and the connecting protrusion 8 is provided with a pin connection hole 9, and the height of the pin connection hole 9 from the claw body 3 is greater than the distance from the highest point of the barb 7 to the claw The height of the main body 3, the pin connection holes 9 of the left and right two-lobed claw body ...

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Abstract

The invention relates to an in-tube instrument fisher. The in-tube instrument extractor at least comprises a fisher body and a fisher guide shoe connected to the lower end of the fisher body in a threaded manner, and is characterized in that a fisher head clamping mechanism fixed inside the fisher body is composed of a fisher jaw, a jaw pin, a fisher pin and a spring, the fisher jaw is divided into a left half jaw body and a right half jaw body, the bottom of the inner side of each of the left and right half jaw bodies is provided with a barb, a connecting bulge is arranged on the middle portion of the inner side of each jaw body, pin connecting holes are formed in each connecting bulge, the pin connecting holes of the left and right half jaw bodies are in pin joint through the jaw pin, two ends of the jaw pin are fixed onto the inner wall of two sides of the fisher body, and the spring is further arranged above the pin connecting holes of the left and right half jaw bodies. The in-tube instrument fisher is applicable to slim-hole fishing, convenient and simple to operate, reasonable in integral structure layout, free of steps on the outer surface of the fisher body, less prone to being bumped and clamped, smooth in fishing process, and thereby high in fishing success rate.

Description

technical field [0001] The invention relates to the field of drilling engineering, in particular to an in-pipe instrument overshot suitable for a wireless inclinometer while drilling. technical background [0002] The original wireless while drilling inclinometer fishing tool needs to use tools to disassemble the overshot instrument during the drilling process, at least two people are needed, and the success rate of fishing the wireless while drilling inclinometer when there is a downhole failure is only 40%. The original fishing tool The outer diameter of the slip ring is 58mm and has steps. The inner diameter of some drilling tool conversion joints is 58mm, and the mouth of the fishing tool slip ring is not processed into a slope and scratches the bone of the drilling tool, resulting in a low fishing success rate and seriously affecting downhole safety. Contents of the invention [0003] The purpose of the present invention is to provide an in-pipe instrument fisher tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/18
Inventor 贾武升李富斌徐闯林闫宏博常加彪
Owner 中国石油集团川庆钻探工程有限公司长庆钻井总公司
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