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Top drive casing system

  • US 7,712,523 B2
  • Filed: 03/14/2003
  • Issued: 05/11/2010
  • Est. Priority Date: 04/17/2000
  • Status: Expired due to Fees
First Claim
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1. A method for making a threaded connection between a first threaded downhole tubular and a second threaded downhole tubular, comprising:

  • providing a rig structure having a top drive operatively connected thereto;

    providing a gripping member, operatively connected to the top drive, for gripping the first threaded downhole tubular;

    gripping the first threaded downhole tubular with the gripping member;

    aligning a first thread on the first threaded downhole tubular with respect to a second thread on the second threaded downhole tubular;

    operating the top drive, thereby rotating the gripping member and the first threaded downhole tubular and thereby inter-engaging the first and second threads;

    measuring a torque developed at the inter-engaging first and second threads during make-up;

    controlling the top drive to adjust the torque in response to the measured torque and prior to an indication of shouldering between the first and second threaded downhole tubulars; and

    continue making the threaded connection after adjustment of the torque.

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