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An airtightness detection device for casing joints

A casing joint and detection device technology, which is applied in well completion, oil and gas casing, and oil and gas drilling fields, can solve the problems of easy wear and tear of airbags, and achieve the effects of prolonging service life, good safety, and uniform force

Active Publication Date: 2020-08-07
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an airtightness detection device for casing joints, which can alleviate the above-mentioned problems

Method used

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  • An airtightness detection device for casing joints
  • An airtightness detection device for casing joints
  • An airtightness detection device for casing joints

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Experimental program
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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0021] Such as Figure 1-3 As shown, an airtightness detection device for casing joints includes a cylinder body 6 and air bags 7 arranged at both ends of the inner cavity of the cylinder body 6, and an air hole 37 and an air channel 36 communicating with the air bag 7 are arranged in the cylinder body 6, The air passage 36 communicates with the airbag 7 and the outer wall of the cylinder body 6, and the air hole 37 communicates with the inner cavity of the cylinder body 6 between the two airbags 7 and the outer wall of the cylinder body 6. In this way, when in use, the airbag can be realized only by inflating and deflated. The tight fit between the 7 and the sleeve 52 does not need to mechanically push the air bag 7 to compress the air bag 7 to compress the sleeve 52, thereby not causing greater wear to the air bag 7, and the wear is almost negligible, and, compared to Usin...

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Abstract

The invention relates to the technical field of oil and gas drilling, well completion and oil and gas casings, and particularly relates to an air tightness detection device for a casing joint. The device comprises a cylinder body and air bags arranged at two ends of the inner cavity of the cylinder body, wherein the cylinder body is internally provided with an air hole and an air channel communicated with the air bag; the air channel is communicated with the air bag and the outer wall of the cylinder body; the air hole is communicated with the inner cavity of the cylinder body between the two air bags and the outer wall of the cylinder body. Large wear is not caused to the air bag, the wear is negligible, in comparison with a mechanically-pushing air bag by adopting other parts, direct inflation can be carried out, each part of the air bag can bear force uniformly, a condition of uneven force bearing does not exist, and the service life of the air bag can be prolonged.

Description

technical field [0001] The invention relates to the technical fields of oil and gas drilling, well completion and oil and gas casing, in particular to a gas tightness detection device for casing joints. Background technique [0002] my country's average annual oil consumption is as high as hundreds of millions of tons, but the oil extraction process is complex and requires a high safety factor. Oil casing is the most widely used pipe in oil production. The oil casing is screwed with internal and external threads to connect the casing end to end and go deep into the downhole service. The oil casing string can not only protect the well wall, but also separate the oil, gas, and water layers. . A single oil casing must have high pressure resistance and corrosion resistance, and the entire oil casing string should also meet good air tightness. At present, the casings are connected by clamps. An ordinary oil well uses up to hundreds of clamps. If the airtightness of any clamp co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M3/20
CPCG01M3/20
Inventor 胡刚王国荣赵世平王璐瑶王陶岳昌洁刘银廖聪冲
Owner SOUTHWEST PETROLEUM UNIV