Submarine oil and gas pipe magnetic flux leakage/very low frequency receiving detection and orientation method and device

Abstract

The invention discloses a submarine oil and gas pipe magnetic flux leakage / very low frequency receiving detection and orientation method. The method comprises 1) installing a magnetic flux leakage detector and a pipe cleaner in a pipe, 2) arranging a detection and positioning device near the pipe, 3) acquiring a sensor voltage signal through an AD acquisition unit through an ARM main control unit in the detection and positioning device, 4) storing an original magnetic field signal in a SD card storage unit through the ARM main control unit, 5) calculating a magnetic field signal and a time value in passage through the ARM main control unit and 6) storing the largest magnetic field value and time value in the SD card storage unit through the ARM main control unit. The invention discloses a submarine oil and gas pipe magnetic flux leakage / very low frequency receiving detection and orientation device. The device and method realize accurate positioning of the pipe defects, the comprehensive assessment of the pipe safety situation and the safe control of the pipe inspection and operation conditions and reduce a project risk.

Description

technical field [0001] The invention relates to the technical field of detection and positioning of oil pipelines, in particular to a magnetic flux leakage / very low frequency reception detection and positioning method and device for submarine oil and gas pipelines. Background technique [0002] Submarine oil and gas are important strategic resources of the country, and the route and status of submarine oil and gas pipelines are important strategic information for the country. Due to the extremely complex environment of submarine pipelines, it is not uncommon for pipelines to be corroded or damaged. Once oil and gas leaks, it will cause huge economic losses and ecological environmental disasters. For a long time, due to the lack of submarine pipeline inspection capabilities in China, my country's submarine pipeline inspection market has been monopolized by foreign oil and gas service companies. Not only are the services expensive, but the information on my country's oil and g...

AI Technical Summary

Problems solved by technology

Due to the extremely complex environment of submarine pipelines, it is not uncommon for pipelines to be corroded or damaged. Once oil and gas leaks, it will cause huge economic losses and ecological environmental disasters.

For a long time, due to the lack of submarine pipeline inspection capabilities in China, my country's submarine pipeline inspection market has been monopolized by foreign oil and gas service companies. Not only are the services expensive, but the information of my country's oil and gas pipelines cannot be effectively protected.

[0003] Magnetic flux leakage detectors and pigs working on submarine oil and gas pipelines may be blocked in corroded oil pipelines, and the devices cannot be positioned accurately. The subsea construction itself is difficult, and inaccurate positioning makes construction operations more difficult and service prices more expensive.

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