Detection device inside water rinser pipe

A detection device and riser technology, applied in the field of drilling, can solve problems such as drilling fluid leakage, affecting drilling operations, and polluting the environment

Pending Publication Date: 2019-06-21
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After the riser breaks, the drilling fluid inside the riser will leak into the seawater to pollute the environment. At the same time, seawater will also enter the riser from the break, affecting drilling operations

Method used

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  • Detection device inside water rinser pipe
  • Detection device inside water rinser pipe
  • Detection device inside water rinser pipe

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Embodiment Construction

[0047]The technical solutions 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 not to limit the scope. After reading the present invention, those skilled in the art will understand the present invention Modifications in various equivalent forms fall within the scope defined by the appended claims of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terminology used herein in the description of the application is only for the purpose of describing specific embodiments, and is not intended to limit the application.

[0049] It should be noted that when an element is referred to as being “disposed on” another eleme...

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Abstract

The invention provides a detection device inside a water rinser pipe. The detection device comprises a central tube, supporting variable diameter mechanisms, a rotation detection mechanism, a detection unit, a second variable diameter unit, and a rotating platform; the supporting variable diameter mechanisms are fixedly connected with the central tube, the supporting variable diameter mechanisms include first variable diameter units, the first variable diameter units are disposed at intervals in a circumferential direction of the central tube, and the first variable diameter units can move ina radial direction of the central tube until abutting against the inner wall of a detection tube; the rotation detection mechanism includes a main body structure, and the main body structure sleeves the central tube; the detection unit is provided with a magnetic memory sensor; the detection unit can be driven by the second variable diameter unit to move in the radial direction of the central tubeuntil abutting against the inner wall of the detection tube; and the rotating platform can drive the detection unit to rotate relative to the central tube. The detection device inside the water rinser pipe provided by the invention can fully utilize a magnetic memory detection technology, the detection device can crawl along the pipe wall of the water rinser pipe and achieves automatic diameter variation, and operation is more stable.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a detection device in a water riser. Background technique [0002] In offshore drilling operations, seawater is isolated by risers, and drilling fluid is injected into the risers to meet the needs of drilling operations. In the prior art, riser fatigue damage is easily induced under complex loads such as ocean current loads, waves, and sea winds during service, especially at the weld of the riser. The weld of the riser is prone to microcracks due to fatigue, which will develop into fatigue cracks or even break after a long time. After the riser breaks, the drilling fluid inside the riser will leak into the seawater to pollute the environment. At the same time, the seawater will also enter the riser from the break, affecting drilling operations. [0003] In order to solve the problem of fatigue cracks and fractures of the riser due to fatigue failure of the weld, it is necessar...

Claims

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Application Information

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IPC IPC(8): G01N27/83G01N21/88G01N21/954G01N21/01H04N7/18H04N5/225
Inventor 刘书杰樊建春李强文敏谢仁军吴怡武治强倪金禄周威赵海旭
Owner CHINA NAT OFFSHORE OIL CORP
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