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尽管套管生产厂家在出厂前对所产的套管进行了检测，但仍有3．5％～5．5％有缺陷的套管出厂。在油田生产中，必须对所用套管进行可靠的缺陷检测。常用的超声波类探伤仪是中国科学院武汉物理研究所科声技术公司的多通道数字式超声波探伤仪。目前国内有上海宝山钢管厂和成都无缝钢管厂使用。中国有色金属工业总公司无损检测中心也开发研制了旋转式漏磁探伤设备，应用于胜利油田的滨南采油厂。涡流探伤类仪器主要生产厂家有上海有色金属研究所等，相应的设备用于上海锅炉厂等生产单位。
Although the casing manufacturer tested the casing produced before leaving the factory, 3.5% -5.5% of the defective casing was still shipped. In the production of oilfields, a reliable defect inspection of the casing used must be made. Commonly used ultrasonic flaw detector is a multi-channel digital ultrasonic flaw detector made by Wuhan Institute of Physics, Chinese Academy of Sciences. At present, there are Shanghai Baoshan Pipe Plant and Chengdu Seamless Steel Pipe Plant. Non-destructive Testing Center of China Nonferrous Metals Industry Corporation also developed a rotary magnetic flux leakage testing equipment used in the Shengnan Oilfield Binnan plant. Eddy current testing equipment manufacturer of the main Shanghai Nonferrous Metal Research Institute, the corresponding equipment for the Shanghai boiler plant and other production units.