Patent ID: 7509722
Filing Date: 2009-03-31
Classification: E21B,Y10T

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