介绍了超声波管材专用双晶探头的结构特点,重点描述了双晶探头手工接触法探伤油井管的仪器调试和探伤方法,以及双晶探头相对于单晶探头探伤所具有的优势和特点,并结合实例证明了应用双晶探头在油井管的探伤中能够提高检测效率和检测质量。 This paper introduces the structural characteristics of dual-purpose probe for ultrasonic pipe, and focuses on the instrument debugging and flaw detection method of double-probe probe flaw detection of oil well pipe as well as the advantages and features of dual-probe relative to single-probe probe. The example proves that the double crystal probe can improve the detection efficiency and the detection quality in the oil well pipe flaw detection.