Top drive torque reactor
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United States of America Patent
Stats
-
Sep 12, 1989
Grant Date -
N/A
app pub date -
May 20, 1988
filing date -
May 20, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A torque reactor for a top drive drilling rig converts reactive torque on the top drive housing into a rotational torque on a torque shaft. The torque shaft extends vertically in the derrick parallel with the drive stem. A torque case carries two bushings, one of the bushings receiving the drive stem of the top drive and the other slidingly receiving the torque shaft. The drive unit bushing is rigidly connected to the housing of the top drive. The torque shaft bushing will transmit rotational force to the torque shaft. Linkages interconnect the bushings. Rotational torque imposed on the drive unit bushing creates a rotational torque in the torque shaft bushing. That torque is transmitted to the torque shaft which is held stationary to absorb the torque.
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