Device for spinning drill pipe in a drill rig
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United States of America Patent
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Apr 21, 1998
Grant Date -
N/A
app pub date -
Jul 29, 1996
filing date -
Jul 29, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for spinning vertical drill pipe on a drill rig includes a pair of opposed pipe gripping arms pivotably connected to the drill rig at a first end. The other end of one pipe gripping arm includes a drive wheel for frictionally contacting a drill pipe to be spun, and the other end of the second gripping arm includes a plurality of idler drive wheels to support the spinning pipe. A rod and cylinder assembly opens and closes the pipe gripping arms between a storage position and a pipe spinning position.
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