Hydraulic Pumping Assembly, System and Method

摘要

A hydraulic pumping assembly provides reciprocating motion to a sucker rod string coupled to a downhole pump. The pumping assembly includes a hydraulic cylinder, a cylinder rod, a telescoping cylinder sleeve for increasing the effective stroke length, and a cylinder base positioned below the hydraulic cylinder. The hydraulic cylinder includes a cylinder barrel, a cylinder head, a piston, and a port configured to direct hydraulic fluid to and from the cylinder barrel. The piston is coupled to the cylinder rod at an upper end of the rod. The cylinder rod slides within the cylinder sleeve, which passes slideably through the cylinder head. The cylinder sleeve moves between an extended position and a retracted position as the piston reciprocates within the cylinder barrel. The cylinder base accommodates the cylinder rod and the telescoping cylinder sleeve in a collapsed position.

主权项

1. A hydraulic pumping assembly for providing reciprocating motion to a sucker rod string coupled to a downhole pump, said hydraulic pumping assembly comprising:
(a) a hydraulic cylinder comprising:
(i) a cylinder barrel;(ii) a cylinder cap at an upper end of said cylinder barrel;a cylinder head at a lower end of said cylinder barrel;(iv) a piston; and(v) at least one port configured to direct hydraulic fluid to and from said cylinder barrel, to cause said piston to reciprocate within said cylinder barrel; (b) a cylinder rod wherein said piston is coupled to an upper end of said cylinder rod; (c) a telescoping cylinder sleeve, wherein said cylinder rod slides within said cylinder sleeve and said cylinder sleeve passes slideably through said cylinder head, and wherein said cylinder sleeve telescopically moves between an extended position and a retracted position as said piston reciprocates within said cylinder barrel; and (d) a cylinder base positioned below said hydraulic cylinder, said cylinder base accommodating said cylinder rod and said telescoping cylinder sleeve in a collapsed position.