Patent ID: 7076852
Filing Date: 2006-07-18
Classification: B23P,E21B,Y10T

Abstract:
1. An apparatus for making up large diameter conductor casing having threaded connections comprising: a lower chain vise adapted to grip a first joint of conductor casing to prevent rotation thereof, a plurality of extendable 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 an upper chain vise 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 easing to the first joint of conductor casing.