| 摘要 |
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. The ported seal stem bottom lend is threaded to receive a coupling collar that is turned thereover for connecting it to a drag plunger of the downhole pump. On an up stroke of the rod tubing string the valve closes, creating a void between it and a standing valve of a downhole pump. On a down stroke, the stem collar valve face is moved off the seat, opening the valve to allow a fluid flow therethrough.
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