介绍了油管对扣螺纹缺陷的隔层漏磁检测方法。首先采用有限元仿真对该方法进行了可行性论证分析,随后通过实验验证。结果表明,在激发出对扣螺纹牙型信号的基础上可发现其上的缺陷异常信号。本文所提出的方法可以在不拆扣的情况下对螺纹啮合区上的缺陷进行检测,减少了检测过程中拆卸油管接箍的工序,提高检测效率的同时也降低了劳动强度。 The method of testing the magnetic flux leakage of the pipe to the thread defect is introduced. First of all, the feasibility of the method is verified by finite element simulation, and then verified by experiments. The results show that the abnormal signal of defects can be found on the basis of the signal of the counterblades. The method proposed in this paper can detect the defects on the thread engagement area without dismantling, which can reduce the process of disassembling the tubing coupling during testing and improve the testing efficiency and reduce the labor intensity.