DEVICE FOR FASTENING SMOOTH-SURFACE PIPELINE TO UNION WITH PROVISION OF NORMALIZED UNCOUPLING FORCE Russian patent published in 2003 - IPC

FIELD: oil producing industry. SUBSTANCE: proposed devise is designed for use in machines and apparatuses. Devise has bushing with ring groove made from side of union, and shank. The latter is mated with ring groove over conical surface. Union nut is of split type. Each part of union nut is in contact with inner surface of pipeline. Sealing gasket is installed on end face of bushing to thrust against end face of union. EFFECT: possibility of uncoupling of threaded joint without rotation of nut relative to union. 2 dwg