Casing shaper

A technology of shaping device and casing, which is applied in the direction of wellbore/well parts, earthwork drilling and production, etc., which can solve the problems of poor shaping effect and achieve the effects of compact structure, convenient maintenance and simple operation

Inactive Publication Date: 2014-12-17
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor shaping effect of the existing casing shaping technology

Method used

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Embodiment Construction

[0027] The casing shaping device according to the present invention will be further described in detail below in conjunction with the accompanying drawings. A casing shaping device, comprising a columnar body 7, the lower end of the body 7 ( figure 1 The right direction in the center) is provided with a conical head 71, along the axial direction of the body 7, the outer surface between the two ends of the body 7 is provided with a plurality of first shaping ball groove groups 72, the conical outer surface of the conical head 71 There are a plurality of second shaping ball grooves 75; the first shaping ball groove group 72 contains a plurality of strip-shaped first shaping ball grooves 73 arranged along the circumference of the body 7, and the first shaping ball grooves 73 are provided with first Shaping ball 74; the second shaping ball groove 75 is arranged along the circumferential direction of the conical head 71, and the second shaping ball groove 75 is provided with a plur...

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Abstract

The invention provides a casing shaper, which comprises a cylindrical body (7), one end of the body (7) is provided with a tapered head (71), the outer surface between both ends of the body (7) is provided with a plurality of first shaping ball slot groups (72) along the axial direction of the body (7), and the tapered outer surface of the tapered head (71) is provided with a plurality of second shaping ball grooves (75); each first shaping ball slot group (72) includes a plurality of strip-shaped first shaping ball slots (73) arranged along the circumference of the body (7), and first shaping balls (74) are arranged in the first shaping ball slots (73); the second shaping ball grooves (75) are arranged along the circumference of the tapered head (71), and a plurality of second shaping balls (76) are tightly arranged in each second shaping ball groove (75). The casing shaper utilizes the shaping balls to squeeze the damaged parts of a casing to achieve the goal of casing shaping.

Description

technical field [0001] The invention relates to a casing shaping device, in particular to a casing shaping and repairing device used in casing deformed well workover operations. Background technique [0002] With the continuous extension of oilfield development time, more and more casing deformation and casing damage are becoming more and more serious, which seriously threatens the safe production of oilfields and restricts the injection-production development of oilfields. Research casing shaping technology to solve the problem of casing deformation , is an urgent problem to be solved, and at the same time, the high temperature at the bottom of thermal recovery wells for heavy oil puts forward new requirements for casing shaping tools. Previous casing shaping techniques mainly include explosive shaping and mechanical shaping. In the explosive shaping technology, it is difficult to accurately control the dosage, and the casing at the deformed part is often accompanied by un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B29/10
Inventor 沙磊肖昌马骁李奕缘朱龙超罗凯文杨宝春
Owner PETROCHINA CO LTD
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