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Device for repairing deformed sleeves by explosion

A technology of casing and explosives, applied in blasting, wellbore/well parts, earthwork drilling and mining, etc., can solve problems such as high operating costs, stuck tools, window opening, etc., and overcome long construction period, short period, construction low cost effect

Inactive Publication Date: 2011-06-15
戈宝富
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional mechanical shaping method (the effective range is generally the deformation is less than 10mm) not only has high operating costs, but also easily causes accidents such as eccentric wear, window opening, drill sticking and tool breakage, which further complicates the downhole situation and needs to be improved

Method used

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  • Device for repairing deformed sleeves by explosion
  • Device for repairing deformed sleeves by explosion

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Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described in conjunction with accompanying drawings.

[0023] Drill the well to the deformed place and wash the well; print to verify the deformation of the deformed place; set up the device structure according to the casing deformation and process requirements, and connect it to the well according to the process design requirements; determine the position of the projectile to go into the well and detonate; If it passes smoothly, the construction is completed; in case of obstruction, check the position and prepare for the second construction until the well is deformed.

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Abstract

The invention discloses a device for repairing deformed sleeves by explosion. Explosive is put at a fracture of a sleeve or a deformed section of a well, an explosive blast wave is formed on the inner surface of the sleeve quickly after the explosive is blasted, and high-pressure blast waves generated by blasting of the explosive enable the sleeve to expand outward in a shorter time so as to repair the deformed sleeve and open the channel, thus the problem that deformations of the sleeve such as hole shrinkage, bending, fracture and the like affect the oil well productivity is solved.

Description

Technical field [0001] The invention relates to a casing deformation repairing device, which relates to the technical field of petroleum exploitation. Background technique [0002] Oil well casing deformation is a common situation in oil fields, which directly affects the production of oil wells. At present, the repair methods for oil pipe deformation and damage are mainly mechanical repair methods, mainly using methods such as blunt blowing with a tube expander, grinding and milling to repair the deformed casing. The traditional mechanical shaping method (the effective range is generally less than 10mm of deformation) not only has high operating costs, but also easily causes accidents such as eccentric wear, window opening, drill sticking and tool breakage, which further complicates the downhole situation and needs to be improved. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the present invention provides a casing deformation...

Claims

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Application Information

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IPC IPC(8): E21B29/10F42D3/00
Inventor 张蹇段宝林
Owner 戈宝富
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