Patent ID: 7114234

Claim:
An apparatus for making up large diameter conductor casing having threaded connections comprising: a fixed grip head comprising a pair of straps adapted to grip a first joint of conductor casing to prevent rotation thereof, wherein one end of the straps are connectable by a latching mechanism, and the other end of at least one of the straps is attached to a strap tensioner operable to tension the straps, and a plurality of movable arms operable to apply a retaining force to a second joint of conductor casing to maintain the second joint of conductor casing in rotational contact with one or more drive wheels on a spinner means, the spinner means operable to rotationally make-up a threaded connection connecting the second joint of conductor casing to the first joint of conductor casing to an initial make-up torque, and a rotary grip head comprising a pair of straps adapted to grip the second joint of conductor casing and operable to apply a final make-up torque to the threaded connection connecting the second joint of conductor casing to the first joint of conductor casing, wherein one end of the straps are connectable by a latching mechanism and the other end of at least one of the straps is attached to a strap tensioner operable to tension the straps.