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Positioning and spinning device

  • US 7,509,722 B2
  • Filed: 03/05/2003
  • Issued: 03/31/2009
  • Est. Priority Date: 09/02/1997
  • Status: Expired due to Fees
First Claim
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1. A method of connecting a first tubular to second tubular, comprising:

  • disposing a gripping member on a derrick, the gripping member having two adjustable jaws configured to accommodate varying tubular diameters and at least one drive roller;

    engaging the first tubular using the gripping member connected to a conveying member;

    moving the gripping member and the engaged first tubular to align the first tubular with the second tubular;

    determining a position of the gripping member, wherein the position of the gripping member aligns the first tubular with the second tubular;

    memorizing the position of the gripping member;

    engaging the first tubular with the second tubular;

    rotating the first tubular relative to the second tubular using the at least one drive roller, wherein;

    the first tubular moves along an axis thereof during rotation,the gripping member is disposed on a rail, andthe gripping member moves along the axis with the first tubular by being moved alone the rail during rotation of the first tubular; and

    rotating the first tubular relative to the second tubular using a top drive until the connection is complete.

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