High-precision inner detecting device for seabed oil and gas pipeline flaws

A technology of oil and gas pipelines and detection devices, which is applied in the direction of special pipes, pipe components, pipes/pipe joints/pipe fittings, etc., to achieve the effects of eliminating unstable factors, strengthening pipeline passing capacity, and simple launch and recovery

Active Publication Date: 2014-02-26
TSINGHUA UNIV
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Problems solved by technology

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a high-precision internal detection device for defects in submarine oil and gas pipelines, which adopts a floating magnetization detection structure, which well solves the problem of in-line detection of defects in oil and gas pipelines under complex working conditions

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  • High-precision inner detecting device for seabed oil and gas pipeline flaws
  • High-precision inner detecting device for seabed oil and gas pipeline flaws
  • High-precision inner detecting device for seabed oil and gas pipeline flaws

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the accompanying drawings and embodiments, taking an 18-inch (457 mm) floating submarine oil and gas pipeline defect high-precision internal detection device as an example for illustration.

[0021] The overall length of the 18-inch floating subsea oil and gas pipeline defect high-precision internal detection device is 871 mm, of which the length of the fixed body is 803 mm. The maximum diameter of the floating magnetization detection block 5 is 450 mm. The working diameter of the floating magnetization detection block 5 is 428 mm. The minimum shrinkage diameter of the detection block 5 is 320 mm, the maximum fixed body diameter of the detection device is 315 mm, and the overall weight of the detection device is 260 kg.

[0022] refer to figure 1 , The 18-inch floating subsea oil and gas pipeline defect high-precision internal detection device includes a body support shaft 2, which is supported by...

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Abstract

A high-precision inner detecting device for seabed oil and gas pipeline flaws is characterized in that an anti-collision head and a front power packing cup are connected to the front end of a body support shaft, the rear of the front power packing cup is connected with a floating magnetization detecting block through a hinge mechanism, and a lateral jacking spring is disposed on each of the front side and the rear side of the floating magnetization detecting block to form a floating magnetization circuit and a magnetic flux leakage detecting block unit. A finger probe is disposed on the floating magnetization detecting block. A guide groove and a limit ring are arranged at the rear end of the body support shaft. A rear power packing cup is disposed at the rear of the guide groove. The front packing cup and the rear packing cup jointly form a power drive system. A battery pack unit and an electronic recorder are respectively disposed at the front and the rear of a seal cabin in the body support shaft in an opposite insertion manner. A detector odometer wheel unit is mounted at the tail of the body support shaft. By the floating magnetization detecting structure, online inner detection of oil and gas pipeline flaws under complex working conditions can be well achieved.

Description

technical field [0001] The invention relates to the technical field of detection of submarine oil and gas pipelines, in particular to a high-precision internal detection device for defects of submarine oil and gas pipelines. Background technique [0002] With the development of offshore oil and gas extraction technology, the supporting submarine oil and gas pipeline technology is also constantly improving, and the safety of offshore oil pipelines is a key technology in this field. Because there are great differences between submarine oil and gas pipelines and land oil and gas pipelines: first, the risk is high, because offshore oil pipeline construction is difficult and costly, and once leaked or blocked, it will cause great damage to the environment; second, the working conditions are complex, Submarine oil and gas pipelines are generally laid according to the topography of the seabed, especially when there are vertical risers when the pipeline goes up and down the platform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/32F16L55/48F16L101/30
CPCF16L55/32F16L55/48F16L2101/30
Inventor 黄松岭赵伟王珅程若凡
Owner TSINGHUA UNIV
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