Donald J Downing

US Patent:

51393980, Aug 18, 1992

Filed:

Apr 8, 1991

Appl. No.:

7/682467

Inventors:

Donald R. Downing - Vernal UT

Assignee:

D & L Valve, Inc. - Vernal UT

International Classification:

F04B 2106

US Classification:

417511

Abstract:

A neutralizer valve that is for use in conjunction with one or more reciprocating pumps of a tubing string that is operated in an oil well for recovery of crude oil. The neutralizer valve takes the place of a regular traveling valve in a rod pump, which includes a drag plunger for passing a crude and natural gas mix therethrough on a down stroke of the tubing string. The neutralizer valve includes a guide barrel that connects into the rod pump plunger and contains a ported seal stem that is arranged to move up and down therein. The ported seal stem includes a keyed rod as its upper end that is for fitting to travel up and down in a keyway that is formed through a ported disk which is arranged across the guide barrel interior. The ported seal stem includes a collar formed around its mid-section, the undersurface of which collar is a valve face that is for engaging, so as to seal against a seat that is maintained in the guide barrel. Which ported seal stem is ported below the collar into a center longitudinal passage that opens at the stem bottom end face.