F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/39, 137/63
F04B 47/00 (2006.01) F16K 17/12 (2006.01)
Patent
CA 2040324
"DOWNHOLE RECIPROCATING PUMP AND COMPONENTS THEREFOR" ABSTRACT OF THE DISCLOSURE A downhole reciprocating pump is provided having novel check valves and a novel plunger. Each check valve has a generally cylindrical valve member having a smooth-surfaced tapered lower end adapted to seat in a tapered seat. The upper portion of the valve member carries outwardly protruding, spaced apart vanes disposed at an acute angle relative to the axis of the valve member. Fluid can move past the valve member through the channels between the vanes. Interaction between the fluid and vanes causes the valve member to spin. By combining the downwardly tapered sealing surfaces with the spinning valve member, sand is kept clear of the sealing surfaces and erosion, arising from the surfaces being propped apart, is reduced. The plunger is equipped with oppositely directed, upper and lower pressure-driven metal seal rings. Each seal ring has a thin, axially extending, annular lip that is flexed by downhole pressure into sealing contact with the inside surface of the pump barrel. The seal rings provide the plunger with effectively an interference fit, thereby eliminating the problems that characterize plungers having a clearance fit with the barrel.
Mason Leonard V.
Mason Tools Ltd.
Ogilvie And Company
LandOfFree
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