Corrugated pipe expansion tool

A technology of bellows and tools, which is applied in the field of oil drilling, can solve the problems that it is difficult to meet the application needs of expansion bellows, large hole expansion rate, irregular well diameter, etc.

Pending Publication Date: 2021-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The expansion rate of the existing reamer is generally large, and the diameter of the hole is irregular, which is difficult to meet the needs of the field application of the expansion bellows

Method used

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  • Corrugated pipe expansion tool
  • Corrugated pipe expansion tool
  • Corrugated pipe expansion tool

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Embodiment Construction

[0030] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.

[0031] figure 1 A bellows expansion tool according to one embodiment of the invention is schematically shown. According to the bellows expansion tool of the present invention, the wellbore can be reamed before the expansion bellows is run in, and the expansion bellows can be mechanically expanded after the expansion bellows is run in, and has the cutting ability, and the remaining welding seam of the expansion bellows can be eliminated. High for cutting.

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Abstract

The invention provides a corrugated pipe expansion tool, and belongs to the field of petroleum drilling. The corrugated pipe expansion tool comprises an upper spiral reaming body and a lower spiral reaming body; a plurality of spiral upper reaming body side wings are uniformly arranged in the circumferential direction of the upper spiral reaming body; a lower spiral reaming body is connected to the lower portion of the upper spiral reaming body, and a plurality of spiral lower reaming body side wings are evenly arranged in the circumferential direction of the lower spiral reaming body; coaxialcenter holes are formed in the middle parts of the upper spiral reaming body and the lower spiral reaming body; and the spiral directions of the upper reaming body side wings and the lower reaming body side wings are opposite. According to the corrugated pipe expansion tool, a shaft can be reamed before the expansion corrugated pipe is tripped in, the expansion corrugated pipe is mechanically expanded after the expansion corrugated pipe is tripped in, and the corrugated pipe expansion tool has cutting capacity and cuts the excess weld metal of a welding seam of the expansion corrugated pipe.

Description

technical field [0001] The invention relates to a bellows expansion tool, which belongs to the field of petroleum drilling. Background technique [0002] Expanded bellows technology is to cold-press the round pipe to make the cross-section corrugated. During the drilling and completion process, the bellows pipe string is lowered into the well, and the pipe string is restored to a round pipe by hydraulic or mechanical means. , a drilling technique that realizes the sealing of complex formations and maintains the original borehole size. Its unique technical advantage is that it can continue to drill with the original size drill bit after it can reliably seal complex formations. The advantage of the expansion bellows technology is that it can isolate complex formations such as downhole leakage and easy collapse, simplify the wellbore structure, and reduce drilling costs. At the same time, this technology can be applied to casing subsidy, and can even achieve single-hole-size ...

Claims

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Application Information

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IPC IPC(8): E21B29/00
CPCE21B29/00
Inventor 路保平陶兴华孙明光臧艳彬涂玉林胡彦峰刘晓丹
Owner CHINA PETROLEUM & CHEM CORP
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