Thread Wear Evaluation for 7'' and 9-5/8'' O.D. (Outside Diameter) Casing Conducted at the Nevada Test Site: Engineering Report

摘要

This study, conducted during 1985, evaluated five types of premium casing coupling thread wear. The tests were monitored with instrumented torque-turn and pull test equipment. During each make and break cycle, the coupling was load tested for five minutes to 75% of pipe body yield. This procedure was repeated until distortion of the coupling was not in conformance with API RP 5B1 specifications. (ERA citation 12:033387)