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duplex pump

1. n. [Well Workover and Intervention]

A type of fluid pump, commonly used on workover rigs, that has two plungers or pistons. As a positive-reciprocating pump, the fluid flow rate is typically calculated from the number of strokes per minute that the pump makes and the displacement volume per stroke. Such a level of accuracy usually is sufficient for general workover purposes.

See: fluid flow

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