长输管道打孔盗油日益专业化、高隐蔽化,已成为管道企业完整性管理的一大难点。针对常规检测手段存在的检出率低、成本高、周期长等缺点,研制了一种基于涡流原理的防打孔盗油专用管道内检测器,介绍了内检测器的机械系统和电子硬件系统,并对打孔盗油涡流内检测的数据分析和特征信号识别进行研究。牵拉试验、现场应用和开挖验证结果表明,该防打孔盗油专用管道内检测器能够有效检出并精确定位打孔盗油点,同时也能够检出一些典型的内壁缺陷,有望减少其引起的次发性危害以及经济损失。

Stealing oil by hole-drilling in long-distance pipelines is increasingly specialized and highly concealed, which has become a major challenge in the integrity management of pipeline enterprises. Aiming to overcome the shortcomings of conventional detection methods, such as low detection rate, high cost and long period, a special internal detector for anti hole-drilling type oil theft based on eddy current principle was developed. The basic principle of eddy current inner detection, the mechanical system and electronic hardware system of inner detector were expounded, and the analysis of hole-drilling type oil theft inner detection data and the identification of characteristic signals were studied. The results of pulling test, field application and excavation verification show that the in-line detector for hole drilling type oil theft can effectively detect and accurately locate the theft point, and at the same time, it can also detect some typical inner wall defects, thus reducing economic losses and secondary hazards caused by them.