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Sleeve repairing device

A casing and sliding sleeve technology, applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of casing damage, shrinkage deformation, production stagnation, casing rupture, etc., and achieve the effect of strong practicability and simple structure

Inactive Publication Date: 2013-02-13
SHAANXI HI TECH ENERGY DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous production of oil wells, sand production in oil layers, reactivation of faults, water swelling of mudstone, frequent workover operations and improper construction will cause casing damage to shrink and deform. stagnation

Method used

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  • Sleeve repairing device

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Embodiment 1

[0011] A bushing repair device according to the present invention comprises a main body 1, a mandrel 2 slidingly connected with it inside the main body 1, and a tapered sliding sleeve 3 ring is set outside the main body 1, fixedly connected with the mandrel 2, and The shrink sleeve 4 is arranged on the outside of the tapered sliding sleeve 3 and is in sliding connection with the tapered sliding sleeve 3 . The body 1 of the present invention is provided with a conical end at which the expanding and shrinking sleeve 4 is provided.

[0012] When in use, the device goes downhole with the drill string. When the casing shrinks downhole, the expansion sleeve is stuck at the point where the casing shrinks. The shape sliding sleeve 3 moves down, and the radial component force is applied by the conical sliding sleeve 3 expansion and contraction sleeve 4 to expand it, forcing the sleeve to recover. When the repair is completed, the device can be lifted up.

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Abstract

A sleeve repairing device relates to a straightening or reshaping device of sleeves, sections bars and other products, in particular to an oil well sleeve repairing device. The sleeve repairing device comprises a body, wherein a mandrel in sliding connection with the body 1 is arranged in the body 1, a sliding sleeve is arranged outside the body in surrounding mode and fixedly connected with the mandrel, and an expansion sleeve is arranged outside the sliding sleeve and is in sliding connection with the sliding sleeve. The sleeve repairing device can reshape the hole shrinkage position of a sleeve through expansion and extrusion of the expansion sleeve, and is simple in structure, strong in practicality and capable of achieving industrial production.

Description

technical field [0001] The invention relates to a straightening or reshaping device for products such as pipe sleeves and profiles, in particular to a repair device for oil well pipe sleeves. Background technique [0002] With the continuous production of oil wells, sand production in oil layers, reactivation of faults, water swelling of mudstone, frequent workover operations and improper construction will cause casing damage to shrink and deform. stagnation. Contents of the invention [0003] The present invention aims to provide a device capable of repairing shrinkage of oil well casing. [0004] A casing repair device according to the present invention comprises a body, the body 1 is provided with a mandrel slidably connected thereto, the sliding sleeve ring is provided outside the body, is fixedly connected with the mandrel, and is sleeved outside the sliding sleeve for expansion and contraction , slidingly connected with the sliding sleeve. [0005] More preferably...

Claims

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Application Information

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IPC IPC(8): E21B29/10
Inventor 王耀斌
Owner SHAANXI HI TECH ENERGY DEV