ANCHOR Russian patent published in 2004 - IPC

FIELD: equipment for driving, testing and operation of holes. SUBSTANCE: invention is intended for setting of various installations at depth of well specified at will. Anchor includes rod, cone with seizing threading dies, synchronizer of movement of dies, body of lock with collet in the form of springy tabs, friction clutch with spring-loaded straps coupled rigidly to body of lock. Outer surface of rod has right-hand thread, collet is put on rod inside body of lock. Thrust right-hand thread engaging thread of rod is cut in inner surface of ends of springy tabs. Groove in which shock-absorbing rings to adjust stiffness of pressing of springy tabs is made in outer surface of tabs. Collet is fixed against longitudinal movement by internal protrusion of body of lock and against turning with reference to body of lock and bending of springy tabs by plates spline-joined to tabs of collet made fast to body of lock. EFFECT: enhanced operational reliability and simplified design of anchor. 2 dwg