SAFETY LOCK FOR ELEVATORS

摘要

An elevator having a safety lock is provided to prevent the inadvertent release of a tubular. In one embodiment, the elevator includes a body for supporting the tubular and a locking apparatus activatable by an upset porti on of the tubular, the safety locking apparatus adapted to prevent the tubular handlin g apparatus from releasing the tubular when activated. In another embodiment, the elevator is provided with a secondary override locking device for the safety lock so that jarring operations may be performed using the elevator.