PUMPJACK TORQUE FILL ESTIMATION
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United States of America Patent
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Issued Date -
Mar 27, 2014
app pub date -
May 6, 2011
filing date -
May 6, 2011
priority date (Note) -
Abandoned
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Abstract
The fill of a downhole pump of a pumpjack or other system may be estimated based on a dynamically changing a reference torque or force curve and actual torque or force measurements during at least a portion of a pump stroke. Using various techniques, the reference curve may dynamically change over time to take into account slowly changing operating conditions. Moreover, the reference curve and/or the measurements may be adjusted to ensure that the estimated and/or reported pump fill does not exceed 100 percent of pump capacity.
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