Drill pipe handling mechanism
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United States of America Patent
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Aug 11, 1998
Grant Date -
N/A
app pub date -
Dec 10, 1996
filing date -
Dec 10, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A breakout wrench for making and breaking joints between successive drill pipe in a drill string on a drilling rig includes a swing arm pivotable between a storage and a pipe gripping position. The swing arm carries a first and second pipe gripping jaw, the first jaw movable relative to the swing arm, and the second jaw movable relative to the first jaw. Both jaws are freely movable, to a slight degree, in all directions in the plane of their movement, to permit self-adjustment of position to the wrench relative to a drill pipe centerline. A double-rod hydraulic cylinder actuates both jaws.
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