Apparatus and methods for moving a tubular member to and from an elevated drilling rig floor. A support structure has an elongate indentation in its upper surface. A ramp assembly comprises telescoping assemblies having nested tubular elements extendable between retracted and deployed positions, thus...http://www.google.fr/patents/US8033779?utm_source=gb-gplus-shareBrevet US8033779 - Pipe handling apparatus and methods
