Device for running in of threaded couplings for tube assemblies by screwing and unscrewing

摘要

The device relates to performing at least one threaded-joint screwing-unscrewing cycle in order to assemble pipes with high-torque tightening in order to avoid subsequent damage to the threads. …??This device comprises two keys (1) each engaging on one component (51) of the joint so as to carry out at least one screwing-unscrewing cycle. The means for engaging each key (1), comprise at least one movable jaw (40) which can slide with a small clearance in a chamber (32) by the action of a pushing means (33) which applies it against the wall of the component (51). The base material of this movable jaw has a yield stress less than the stress to which it is subjected in order to distribute the pressure which it exerts. …??Application to the breaking-in (wearing-in) of the components of threaded joints for oil-drilling pipes. …IMAGE…