Top drive interlock
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United States of America Patent
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Feb 8, 2011
Issued Date -
N/A
app pub date -
Nov 15, 2007
filing date -
Nov 17, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention generally relates to methods and apparatus for improving top drive operations. A method of ensuring safe operation of a top drive includes operating a top drive, thereby exerting torque on a first tubular to makeup or breakout a first threaded connection between the first tubular and a second tubular. The method further includes monitoring for break-out of a second connection between a quill of the top drive and the first tubular; and stopping operation of the top drive and/or notifying an operator of the top drive if break-out of the second connection is detected.
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