Ball-casting hydraulic sizing collar

A grading hoop, hydraulic type technology, applied in the field of grading hoop, can solve the problems that affect the smooth progress of well completion operations, shut down the hole in advance, and inconvenient on-site operation, and achieve the effect of ensuring permanence, reasonable structure and convenient use

Inactive Publication Date: 2012-01-18
CNPC XIBU DRILLING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Using grading hoops for staged cementing and completion operations is currently the most widely used and most common technical measure; , or early closure of holes and other defects, which bring a lot of inconvenience to the field operation, and even affect the smooth completion of the well

Method used

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  • Ball-casting hydraulic sizing collar
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Embodiment Construction

[0016] The present invention is not limited by the following examples, and specific implementation methods can be determined according to the technical solutions of the present invention and actual conditions.

[0017] In the present invention, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout of the accompanying drawing 1 of the specification. The layout direction of the graph is determined.

[0018] Below in conjunction with embodiment and accompanying drawing, the present invention will be further described:

[0019] As shown in accompanying drawing 1, this pitching hydraulic type grading hoop comprises mandrel 1, outer cylinder 2, upper joint 7 and lower joint 18; The inner side and the outer side of the lower part are fixedly installed together; the outer side of the lower end of the mandrel 1 and the inner side of the lower end of the outer cylinder 2 are fixedly ins...

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PUM

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Abstract

The invention relates to the technical field of sizing collars, in particular to a ball-casting hydraulic sizing collar, which comprises a mandrel, an outer tube, an upper connector and a lower connector; the outer side of the upper end of the mandrel and the inner side of the upper end of the outer tube are respectively and fixedly mounted with the inner side and the outer side of the lower part of the upper connector; the outer side of the lower end of the mandrel and the inner side of the lower end of the outer tube are respectively and fixedly mounted with the inner side and the outer side of the upper part of the lower connector; and an annular isolated cavity is formed among the mandrel, the outer tube, the upper connector and the lower connector, and an upper spacing sleeve and a lower spacing sleeve which can move downward are installed in the isolated cavity from top to bottom. The ball-casting hydraulic sizing collar provided by the invention has a reasonable and compact structure and is convenient to use; the safe and effective operation of hole opening and hole closing of the ball-casting hydraulic sizing collar can be guaranteed by way of ball-casting hydraulic pressure, so as to guarantee the effective implementation of downhole operations of well cementation and completion; meanwhile, due to the self-locking function of an inverted-tooth ring, the upper spacing sleeve during downward moving can be prevented from moving upward, so as to guarantee the permanence of the hole closing operation.

Description

technical field [0001] The invention relates to the technical field of grading hoops, and relates to a pitching hydraulic grading hoop. Background technique [0002] The use of grading hoops for graded cementing and completion operations is currently the most widely used and most common technical measure; however, most of the grading hoops currently used in the field have defects such as opening holes or closing holes in advance, which brings many problems to field operations. It is inconvenient and even affects the smooth progress of the well completion operation. Contents of the invention [0003] The invention provides a pitching hydraulic grading hoop, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of opening or closing holes in advance in the currently used grading hoops. [0004] The technical solution of the present invention is achieved through the following measures: a pitching hydraulic grading hoop, incl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/13
Inventor 宋朝晖章敬穆总结李晓军陈亮郑义平
Owner CNPC XIBU DRILLING ENG
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