F - Mech Eng,Light,Heat,Weapons – 04 – B
Patent
F - Mech Eng,Light,Heat,Weapons
04
B
103/142, 103/155
F04B 47/00 (2006.01) E21B 34/06 (2006.01) E21B 34/14 (2006.01) F04B 47/02 (2006.01) F04B 53/10 (2006.01)
Patent
CA 2039943
ABSTRACT The present invention is drawn to an improved inlet valve assembly for use in subsurface sucker rod operated reciprocating piston pumps used in the petroleum industry for pumping oil from a downhole well to the surface.
Chacin U. Jesus E.
Vadasz F. Amnon M.
Intevep S.a.
Swabey Ogilvy Renault
LandOfFree
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