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

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...

AI Technical Summary

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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