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Conductor torquing system

  • US 7,076,852 B2
  • Filed: 02/14/2003
  • Issued: 07/18/2006
  • Est. Priority Date: 03/18/2002
  • Status: Expired due to Fees
First Claim
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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.

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