Detection device and detection method for external corrosion of submarine pipelines

A detection device and a technology for submarine pipelines, which are applied to measurement devices, material analysis by electromagnetic means, instruments, etc., can solve problems such as lack of detection means and affecting submarine pipeline transportation.

Inactive Publication Date: 2018-02-09
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The lack of external corrosion detection methods for submarine pipelines has become a technical barrier affecting the transportation of submarine pipelines

Method used

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  • Detection device and detection method for external corrosion of submarine pipelines
  • Detection device and detection method for external corrosion of submarine pipelines
  • Detection device and detection method for external corrosion of submarine pipelines

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Embodiment Construction

[0019] The present invention will be described in more detail below with examples in conjunction with the accompanying drawings.

[0020] combine figure 1 and figure 2 , The submarine pipeline external corrosion detection device of the present invention mainly includes a pressure difference acquisition sensor 1 , a data acquisition and processing module 2 , a signal transmitter 3 , a remote observation control terminal 4 and a pipeline 5 . Wherein the pressure difference acquisition sensor, data acquisition and processing module, and signal transmitter are located under the seawater, and the remote observation control terminal is located on the seawater, and the signal is transmitted through the optical fiber.

[0021] The differential pressure acquisition sensor uses a platinum electrode. Platinum electrode has good stability; strong anti-polarization performance; the temperature coefficient of the electrode with good temperature response characteristics is smaller, the se...

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Abstract

The invention provides a detection device and detection method for external corrosion of submarine pipelines. According to the invention, a voltage difference method is applied to damage detection ofouter anticorrosive coatings of oil and gas transmission pipelines in a marine environment based on analysis of the surface current density distribution characteristics of submarine pipelines under cathodic protection and the field distribution characteristics of surrounding environments thereof, and designing of a hardware part and a software part of a system is completed. In the aspect of hardware, a data acquisition card is used as a core device, and high-speed acquisition of signals is realized; an appropriate electrochemical signal measuring probe is selected; a signal amplification circuit and a data processing module for filtering and storage are designed; remote communication between overwater and underwater processors is realized via an optical fiber transmission module; and on the basis of a hardware system, a set of software for acquiring and analyzing potential signals of electric fields of submarine pipeline environments is written based on a LabVIEW development environment, thereby realizing the functions of signal acquisition and storage, morphological filtering, spectrum analysis, alarming of damage and corrosion spots, etc.

Description

technical field [0001] The invention relates to a detection device for external corrosion of a submarine pipeline. The invention also relates to a method for detecting external corrosion of a submarine pipeline. Background technique [0002] Oil and gas pipeline transportation has the characteristics of less investment in the transportation process, short transportation cycle, large transportation volume, and high efficiency, making it called "energy blood". It has very obvious advantages in the five major transportation industries and plays an important role in economic development. important role. However, frequent safety accidents caused by damage to submarine pipelines not only destroy the ecological environment, but also cause incalculable losses to the national economy, and also endanger people's lives. Therefore, all walks of life are paying more and more attention to the safety of submarine pipeline operation. [0003] At present, the external corrosion detection ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/416
CPCG01N27/416
Inventor 国强于鑫滕龙张典飞徐庆帅王强波戚连钢付文宇李高源
Owner HARBIN ENG UNIV
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