Pumping unit drive system

Details Pumping unit drive system Pumping unit drive system

F - Mech Eng,Light,Heat,Weapons

15

B

103/142

F15B 9/02 (2006.01) F04B 47/02 (2006.01)

Patent

CA 1255154

ABSTRACT OF THE DISCLOSURE A drive system for a down hole oil well pump includes a cylinder assembly which defines first and second cylinders. A pump rod which includes first and second pistons, each disposed in a respective one of the cylinders, is coupled to the down hole pump. A hydraulic accumulator supplies a resilient biasing force to one of these pistons to counter the weight of the ram interconnecting the pump rod and the down hole pump. A hydraulic pump supplies pressurized hydraulic fluid which is alternately directed against upwardly facing and downwardly facing piston faces of the pump rod to cause the pump rod to oscillate, thereby driving the down hole pump. Fluid level sensors deactivate the hydraulic pump when the oil level in the oil well falls below a pre-set level.

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