Oil well pump with resilient plunger cup means
A subsurface well pump is claimed comprising a first elongated stationary tubular member in communication with a well fluid reservoir, a second elongated tubular member in communication with the well fluid and concentrically arranged with respect to the stationary tubular member and reciprocal with respect thereto, check valve means disposed within one of said tubular members to provide alternate open and closed positions for the pump during operation thereof, resilient sleeve means disposed around the outer periphery of the said one tubular member and engagable with the inner periphery of the other tubular member, stop means provided on the outer periphery of the said one tubular member and engagable by one end of the resilient sleeve means, adjustment means movably secured to the outer periphery of the said one tubular member and selectively engagable with the opposite end of the resilient sleeve means for applying longitudinal pressure thereto whereby the outer diameter of the resilient sleeve may be varied, and discharge port means provided for the said one tubular member for discharging the well fluid therefrom for elevation of the fluid to the surface of the well during operation of the pump. Claims are made for the check valve and stop means.
- Assignee:
- TIC; ERA-01-018611; EDB-76-051531
- Patent Number(s):
- US 3947158
- OSTI ID:
- 7192289
- Country of Publication:
- United States
- Language:
- English
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