Rotary type cutting and fishing integral fisher

An overshot and rotary technology, applied in the direction of wellbore/well components, earthwork drilling and production, etc., can solve the problems of easy tilting of the upper layer pipe string, failure to work normally, long workover period, etc., and achieve obvious anti-retreat effect, reduce Small friction, good torque transmission effect

Inactive Publication Date: 2016-07-20
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The workover period is long, the efficiency is low, and when the cutter equipment is lifted, the upper pipe string to be cut and milled is easy to tilt, deform and other problems, and the salvage tool cannot work normally after going down the well, and a secondary accident of salvage occurs

Method used

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  • Rotary type cutting and fishing integral fisher
  • Rotary type cutting and fishing integral fisher
  • Rotary type cutting and fishing integral fisher

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Such as Figure 1 to Figure 6 As shown, the rotatable fishing and fishing integrated fisher of the present invention includes an upper joint 1 provided with an internal thread, the upper joint 1 is connected to a lower joint 2 provided with an external thread, and the upper joint 1 and the lower joint 2 The contact surface between them can be sleeved with an O-ring or an open retaining ring. The upper end of the lower joint 2 is provided with an anti-retreat annular groove along the circumference. Correspondingly, the side wall of the upper joint 1 is provided with a through hole perpendicular to the axial direction. hole, the through hole is fixedly provided with a left anti-loosening sleeve 15 and a right anti-loosening sleeve 16 through an anti-loosening screw 14, and the side of the connecting end between the left anti-loosening sleeve 15 and the right anti-...

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PUM

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Abstract

The invention discloses a rotary type cutting and fishing integral fisher. The rotary type cutting and fishing integral fisher comprises an upper connector provided with an internal thread. The upper connector is connected with a lower connector provided with an external thread. The inner side of the lower end of the upper connector is provided with L-shaped tracks. The lower connector is sequentially sleeved with an upper bearing ring, a slip cone body and a lower bearing ring from top to bottom. The part between the slip cone body and the lower connector is sequentially sleeved with an upper roller pin sealing sleeve, an upper roller pin bearing, a lower roller pin bearing and a lower roller pin sealing sleeve from top to bottom. The upper end and the lower end of the upper roller pin bearing are provided with upper roller pin bearing spacer rings correspondingly. The upper end and the lower end of the lower roller pin bearing are provided with lower roller pin bearing spacer rings correspondingly. The slip cone body is sleeved with a slip. The outer side of the upper end of the slip is provided with L-shaped keys. The rotary type cutting and fishing integral fisher is simple in structure, convenient to use, long in service life, capable of descending a well along with a cutter and conducting one time of cutting milling and fishing operation on a pipe column to be cut and milled, and suitable for cutting milling and fishing of the pipe column.

Description

technical field [0001] The invention relates to an overshot, and more specifically, relates to a rotatable overshot integrated with cutting and fishing. Background technique [0002] With the continuous increase of energy demand, many large and small oil fields have entered the middle and late stage of development. The longer the well age, the more the number of workover operations and the greater the workload. The demand for workover tools is also increasing, which drives the workover technology and With the progress and development of workover tools, the requirements for workover tools are becoming more and more stringent, and the workover tools are more and more required to have high performance and quality, long service life, high work efficiency and diversified functions. In the conventional cutting and fishing process, the conventional process is to lower the cutting and milling equipment first, and then lower the fishing tool for the second time to salvage the cutting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B31/16E21B31/18
CPCE21B31/16E21B31/18
Inventor 朱益辉刘小刚刘宝生杨保健王昆剑姬广奇刘禹铭魏来
Owner CHINA NAT OFFSHORE OIL CORP
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