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

A technology for oil and gas pipelines and positioning devices, applied in pipeline systems, chemical instruments and methods, cleaning methods and appliances, etc., can solve the problems of oil and gas pipeline information not being effectively protected, inaccurate positioning, pipeline corrosion or damage, etc., to achieve Reduce deployment times and maintenance costs, strong anti-interference ability, and ensure accuracy

Inactive Publication Date: 2017-10-20
716TH RES INST OF CHINA SHIPBUILDING INDAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings, but the present invention is not limited to the following embodiments.

[0037] see figure 1 , magnetic flux leakage / very low frequency receiving detection and positioning device, including the ARM main control unit connected with the AD acquisition unit, the ARM main control unit connected with the storage unit, the AD acquisition unit connected with the three-axis magnetic sensor, and the AD acquisition unit connected with the inductive magnetic sensor .

[0038] The three-axis magnetic sensor has one, which is connected to the magnetic flux leakage detection terminal of the AD acquisition unit through a shielded wire, and the three-axis magnetic sensor has the ability to detect magnetic fields in all directions; the two inductive magnetic sensors are two, which are connected to each other by a shielded wire and The very low frequency detection terminals of ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/85F17D5/02B08B9/04
CPCB08B9/04F17D5/02G01N27/85
Inventor 姚尧李斌金浩强高新岗张平马莉锋常鹏张晓霜
Owner 716TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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