Patent ID: 7546882
Filing Date: 2009-06-16
Classification: E21B

Abstract:
1. A method of connecting a tubular to a tubular string in a drilling rig, comprising: providing a compensator assembly having one or more compensator pistons; moving the compensator assembly to a position proximate the tubular by maneuvering a traveling block; engaging the tubular with a plurality of engaging members operatively coupled to the compensator assembly; moving a lower end of the tubular into engagement with the tubular string which is supported by a gripping apparatus proximate a rig floor; rotating the tubular in order to facilitate connection of the tubular to the tubular string; compensating the engaging members during connection of the tubular to the tubular string by allowing the engaging members to axially translate with the tubular relative to the traveling block; disengaging the tubular from the engaging members; supporting the tubular with a main elevator operatively coupled to the traveling block; and releasing the gripping apparatus.