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Overshot with slots for salvaging sucker rods

A technology of sucker rod and window opening, which is applied in wellbore/well parts, earthwork drilling and production, etc., which can solve the problems of cumbersome process, poor effect and high fishing cost

Inactive Publication Date: 2014-04-30
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, after the oil well sucker rod in the oil field breaks off, the external downhole operation team must be asked to carry out the rod inspection construction, using the method of lifting the casing, that is, using fishing tools such as fishing spears to lift the oil pipe that has been lowered underground to the ground, and then remove the outcrop. The oil rod is raised to the ground, and after the inspection, the pipe and rod must be lowered again. The whole process is very cumbersome, time-consuming and labor-intensive. In practice, the crude oil pollution area under the sleeve is large, and the safety factor of the cross-action of the lower rod and pipe is low; salvage In practice, the tooth pieces are fragile and easy to fall off, the effect is not good, and the salvage cost is high, consuming manpower and material resources

Method used

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  • Overshot with slots for salvaging sucker rods
  • Overshot with slots for salvaging sucker rods

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Embodiment Construction

[0015] In order to have a clearer understanding of the technical features, objectives and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0016] Such as figure 1 , figure 2 As shown, the present invention provides a fenestration overshot 100 for salvaging sucker rods. The fenestration overshot 100 includes a tubular overshot body 1, and a section of connecting tubing 2 is fixed on the upper part of the overshot body 1. The upper part of the connecting tubing 2 is fixedly connected with a short section 3 (the short section is connected with the tubing going down to the well during operation); two windows 11 are oppositely provided on the pipe wall of the overshot body 1; The window 11 is formed with a window tongue 12 inclined upward toward the inside of the overshot body; the distance between the tops of the two opposite window tongues 12 is smaller than the diameter of the coupl...

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Abstract

The invention provides an overshot with slots for salvaging sucker rods. The overshot with slots comprises a tubular overshot body, a section of connection oil pipe is fixedly arranged at the upper portion of the overshot body, and the upper portion of the connection oil pipe is fixedly connected with a short section. Two slots facing to each other are formed in the pipe wall of the overshot body. Slot tongues inclining upwards towards the inside of the overshot body are formed on the slots. The distance between the tops of the two slot tongues facing to each other is smaller than the diameter of an upper coupling of each sucker rod. The overshot with slots for salvaging sucker rods can avoid large area of crude oil pollution in salvage of the sucker rods, reduce salvage cost and save manpower and material resources.

Description

Technical field [0001] The invention relates to a fishing tool for sucker rods, in particular to a window overshot for fishing sucker rods. Background technique [0002] At present, after the sucker rod of the oil well in the oil field is broken, the external downhole operation team must be used to carry out the rod inspection. The method of pulling down the sleeve is adopted, that is, using fishing spears and other fishing tools to first lift the underground tubing to the ground, and then lift the outcrop The oil rod is raised to the ground, and after the inspection is completed, it is necessary to lower the rod again. The whole process is very cumbersome, time-consuming and labor-intensive. In practice, the oil pollution area under the lifting sleeve is large, and the safety factor of the cross-action of the lower rod and tube is low; In practice, the tooth piece is fragile and easy to take off, the effect is not good, and the salvage cost is high, which consumes manpower and m...

Claims

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Application Information

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IPC IPC(8): E21B31/18
Inventor 包波王东冶乔美桦乔荣德郭淑红李彬刘桂君赵云明李爱民张宏图李祎鋆王浩然刘松明邵健冲包晓澎
Owner PETROCHINA CO LTD
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