Positioning apparatus for a power tong
AssigneeWeatherford/Lamb, Inc.
InventorsJorg Lorenz, Joerg-Erich Schulze-Beckinghausen
Life of this patent
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Abstract
A positioning apparatus for moving a power tong (110) between an operative and an inoperative position is a drilling tower (105) comprises a first arm (102) and a second arm (103). One end of the first arm (102) is pivotally connected to one end of the second arm (103) at pivot (106) whilst the other end of both the first arm (102) and the second arm (103) are pivotally mounted on a beam (104) attached to the drilling tower (105). Both arms (102, 103) can be extended and retracted in unison to move the power tong (110) towards and away from its operation position circumjacent a pipe string.
Claims14
A positioning apparatus for moving a power tong between an operative and an inoperative position in a drilling tower, said power tong driven by a motor, which positioning apparatus comprises a first arm and a second arm one end of said first arm being pivotally mounted to one end of said second arm and the other end of both said first arm and said second arm being pivotally mountable on said drilling tower with said first arm and said second arm converging towards one another, means for extending and retracting said first arm and said second arm.
A positioning apparatus for moving a power tong between an operative and an inoperative position in a drilling tower, said power tong driven by a motor, which positioning apparatus comprises a first arm end a second arm one end of said first arm being pivotally mounted to one end of said second arm and the other end of both said first arm and said second arm being pivotally mountable on said ddrilling tower with said first arm and said second arm converging towards one another, and means for extending and retracting said first arm and said second arm, and means for extending and retracting said first arm and said second arm in unison.
Dependencies are inferred from the claim text.