Roller-vane motors and pumps are positive displacement type rotating machines. They are of simple design, short, compact and lightweight. The mud motor is particularly suitable for short-radius directional drilling and well cleaning. The pump will lift a full range of volumes of oil, water or brine. The production motor/pump combination is an attractive alternative to other artificial lift methods as its efficiency is high, the pump speed is variable by control of the power fluid, the set can be installed in strongly deviated wells and can be installed/retrieved without pulling the tubing.

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