Hydraulic control system underflow valve control method and...

Details Hydraulic control system underflow valve control method and... Hydraulic control system underflow valve control method and...

E - Fixed Constructions

21

B

137/24, 166/27

E21B 43/00 (2006.01) E21B 43/12 (2006.01)

Patent

CA 1072856

ABSTRACT OF THE DISCLOSURE This is a method and apparatus for a control system for a well-fluid hydraulic pumping unit. The system senses level in the suction vessel and operates an underflow throttling valve to control both the level in the suction vessel and the flows of the cyclone separ- ator. The system maintains the level in the horizontal suction vessel and simultaneously maintains flows to the cyclone in a range for effec- tive cleaning of the fluid and for self-cleaning of the underflow. The cyclone and its associated hardware are sized based on the above-ground pump flow and any bleed flow from the suction vessel. The system is generally applicable to hydraulic units in which the speed of the above- ground pump is not varied over a wide range.

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