Wells – With eduction pump or plunger – With packer or plug
Patent
1990-11-07
1991-09-17
Kisliuk, Bruce M.
Wells
With eduction pump or plunger
With packer or plug
166325, 166373, 166386, 417448, 417450, 417451, 417454, E21B 3414, F04B 4700
Patent
active
050486047
ABSTRACT:
The invention is drawn to an improved inlet valve assembly for use in subsurface sucker rod operated reciprocating piston pumps. The inlet valve or standing valve is locked in the closed position when the pump is unanchored from the production tubing to prohibit passage of fluid into the pump barrel.
REFERENCES:
patent: 480265 (1892-08-01), Jones
patent: 1020337 (1912-03-01), Wilkinson
patent: 1067496 (1913-07-01), Wilkinson
patent: 1146312 (1915-07-01), Davis
patent: 1676186 (1928-07-01), Hawkins
patent: 2111176 (1938-03-01), Cox
Chacin U. Jesus E.
Vadasz F. Amnon M.
Intevep S.A.
Kisliuk Bruce M.
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