DEVELOPMENTS AND APPLICATIONS TO 35CrMo HIGH STRENGTH STEEL PIPES FOR PERFORATOR GUNS IN OIL WELLS

mechanic properties and dimension precisions of 35CrMo high strength steel pipes for perforator guns in oil wells developed by Special Steel Division, Shoudu I & S Co, have reached those of the same products manufactured in U.S.A. Field tests and practical operations in many oii fields prove that 35CrMo high strength steel pipes made domestically can fully meet the requirements for omnidirectional perforating in oil wells.