APPARATO PER TRASMISSIONE DI TORSIONE E DI PESO DI PERFORAZIONE DISCONNETTIBILE PER PUNTE DI PERFORAZIONE

摘要

A tubular apparatus including an inner tubular member piloted within an outer tubular member, the members having a releasable connection through which torque and axial loads can be transmitted, such connection being readily disconnected, when desired, to permit axial separation between the members.