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Expansion pipe repairing device

An expansion tube and subsidy technology, which is applied in the direction of wellbore/well components, earthwork drilling, etc., can solve the problems of expansion tube inefficiency, cumbersome operation, and long time consumption, so as to improve efficiency, increase expansion success rate, and improve passability Effect

Inactive Publication Date: 2014-11-19
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned milling and milling bottom plug 3a is cumbersome and time-consuming, resulting in low efficiency of the entire expansion pipe subsidy process

Method used

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Embodiment Construction

[0032] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present application.

[0033] The invention provides an expansion pipe subsidy device, which is used for efficiently repairing casing damaged wells.

[0034] The upper or lower position described in this article refers to the use state of the expansion tube subsidy device after entering the downhole. To be precise, the position of the upper expansion cone of the expansion tube subsidy device is relatively up and down. The position of the cone is relatively downward.

[0035]...

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Abstract

The invention discloses an expansion pipe repairing device which comprises an expansion pipe, an upper expansion cone, a lower expansion cone and a force applying component. The expansion pipe is a hollow pipe column extending along an axis. The pipe column is provided with a first port and a second port which are opposite. Each of the upper expansion cone and the lower expansion cone is provided with a conical surface. The conical surface of the upper expansion cone and the conical surface of the lower expansion cone are respectively clamped to the first port and the second port of the expansion pipe. The force applying component can drive the upper expansion cone and the lower expansion cone to move towards each other long the axis of the expansion pipe. By the expansion pipe repairing device, primary and secondary repairing of a casing damage well can be performed efficiently.

Description

technical field [0001] The invention relates to a downhole mechanical tool for oil development, in particular to an expansion pipe subsidy device. Background technique [0002] In the field of petroleum development, with the prolongation of oilfield development time, wells with casing damage (abbreviated as casing damage) are increasing year by year. In the prior art, an expansion pipe subsidy device is usually used to subsidize the casing damage wells. Wherein, the expansion pipe is a metal steel pipe made of special material with good plasticity, which can be expanded to a predetermined inner diameter and outer diameter in the diameter direction by mechanical or hydraulic means after being lowered into the well. When the expansion tube is used to subsidize the casing, the expansion tube with a smaller diameter is first lowered into the casing damaged well, and the overall plastic expansion of the expansion tube occurs under the action of mechanical force or hydraulic press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/10
Inventor 陈强李涛韩伟业李益良孙强
Owner PETROCHINA CO LTD
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