Development of small-diameter pipeline defect detection system based on electromagnetic coupling sensing
Oil and gas pipelines play a vital role in the global energy infrastructure,and pipeline accidents may have serious impacts on the environment,human health,and the economy.In-line inspection(ILI)technology is an important tool for evaluating and analyzing pipeline integrity,however,it confronts significant obstacles such as the inability to identify various types of flaws.In this paper,a novel ILI sensing system based on the mechanism of electromagnetic induction and magnetization is proposed.Firstly,a new magnetic ring structure(MRS)that can generate axial magnetic flux leakage and circumferential uniform AC magnetic field was developed;secondly,the pipe wall penetration ability and magnetic flux were improved by adding a permanent magnet magnetization structure and optimizing the configuration of the excitation structure.It overcomes the detection performance constraint of a single detection technology and increases the detection capacity of shallow surface defects and deeper buried flaws while assuring the ILI in the high lift-off.A real-pipe pulling test was performed to assess the feasibility of the proposed MRS.Finally,the suggested method's detection and penetration abilities are effectively validated using finite element modeling,experiment,and pulling test.
ILI technologyMRS systemelectromagnetic coupling sensingpenetrabilitypipe trafficability
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维普
