Top drive output torque measurement method
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United States of America Patent
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Feb 18, 2014
Grant Date -
Jul 19, 2012
app pub date -
Jan 14, 2011
filing date -
Jan 14, 2011
priority date (Note) -
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Abstract
A top drive assembly that includes a gauge for measuring strain in a linkage coupling the top drive to a drilling rig frame. The strain measuring gauge, which can be a strain gauge, is disposed on a pin that pivotingly links members of the linkage coupling. When a motor in the top drive assembly operates to rotate an associated pipe string, the torque generated by the motor can be estimated by monitoring strain measured in the pin.
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