Hydraulic pumping unit with a variable speed triplex pump

Details Hydraulic pumping unit with a variable speed triplex pump Hydraulic pumping unit with a variable speed triplex pump

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F04B 49/00 (2006.01) E21B 43/12 (2006.01) F04B 47/08 (2006.01) F04B 49/10 (2006.01)

Patent

CA 1068983

HYDRAULIC PUMPING UNIT WITH A VARIABLE SPEED TRIPLEX PUMP ABSTRACT OF THE DISCLOSURE This invention is a hydraulic pumping unit which uses a cyclone feed pump means to vary the speed of the above-ground pump, while still providing proper cleaning of the power fluid for the down- hole pump. The ability to conveniently change the speed of the above- ground pump allows the speed of the pump to be reduced whenever well conditions make such a reduction appropriate, and this provides a very substantial reduction in the cost of power for the prime mover (typi- cally an electric motor). In addition to the cyclone feed pump and a speed control means to vary the speed at which the prime mover drives the above-ground pump, this invention uses a flowback line connected from the cyclone overflow to the feed pump inlet.

289717

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