基于远场涡流技术的油气集输管道缺陷检测研究

由于石油和天然气在集输过程中含有大量腐蚀成分,会对集输管道造成腐蚀形成穿孔、凹槽等缺陷,为了保证集输管道的安全,需要对腐蚀缺陷进行检测。本文运用远场涡流检测原理,建立了基于集输管道的远场涡流仿真模型,通过管道缺陷对磁感应强度轴向分量幅值和相位的影响进行分析,得出了管道内壁缺陷的深度与对应检测信号的关系,解决了对缺陷深度的定量测量问题。

Pipeline Defect Method for Oil and Gas Gathering Pipeline Based on RFFC Testing

As oil and natural gas contain a lot of corrosive components during gathering process, they will cause corrosion, such as perforation and grooves, etc., so as to ensure the safety of gathering pipelines, it is necessary to detect corrosion defects. Based on the remote-field eddy current detection principle, the remote-field eddy current simulation model based on the gathering pipeline is established. Through the analysis of the influence of the pipeline defect on the amplitude and phase of the magnetic induction axial component, the ralationship of the depth of the inner wall defect and the corresponding detection signal is obtained. The relationship solves the quantitative measurement of the depth of the defect.