Patent ID: 7762343
Filing Date: 2010-07-27
Classification: E21B

Abstract:
1. An apparatus for handling pipes, the apparatus comprising, a door engaging with a latch, the door operated by a hydraulic piston and cylinder, the piston and cylinder having a signal port, a body having a tapered surface and at least a first slip and a second slip slidable on the tapered surface, a slip actuator for setting said at least said first slip and said second slip, said first slip and said second slip having interengaging elements therebetween such that upon actuation of said slip actuator, said first slip is set and said second slip is set by the interengaging elements transferring the setting force from the slip actuator through said first slip to said second slip, and a pilot line and a valve for selectively directing flow of a hydraulic fluid to the signal port to activate the slip actuator to disengage the slips, thereby allowing the slips to be disengaged while the door and latch remain engaged.