Methods and system for independently controlling injector head drive motor speeds
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United States of America Patent
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Oct 16, 2018
Grant Date -
Mar 17, 2016
app pub date -
Sep 17, 2015
filing date -
Sep 17, 2014
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Abstract
A system for controlling a coiled tubing injector head includes a hydraulic control line in fluid communication with each drive motor, a valve associated with one or both hydraulic control lines, and a sensor associated with each drive motor. Each sensor is configured to output to a digital computer a signal representative of a motor speed, and at least one valve associated with a hydraulic control line is operable to regulate pressure in the hydraulic control line and thereby increase or decrease the speed of the corresponding motor until both speed sensors report substantially matching motor speeds.
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