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Oilfield Glossary
Oilfield Glossary
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pump volumetric efficiency

1. n. [Production Testing]
The relationship between actual pump displacement and the pump displacement under ideal conditions. The relationship can be expressed as percentage. A reduction in pump volumetric efficiency is an indication of an operational problem in the well. In sucker-rod pumps, the gas lock and gas interference phenomena can significantly reduce the volumetric efficiency of the pump.