Rodless pumping system

Details Rodless pumping system Rodless pumping system

1999-04-08

2000-12-05

Walberg, Teresa

Pumps

Motor driven

Fluid motor

F04B 3302

Patent

active

061558036

ABSTRACT:
A rodless pump is disclosed which is connected to a pressure source via a conduit. In a common oilfield application the pump would be connected to the bottom of a tubing string within the reservoir fluid to be produced. A pressure source such as a hydraulic pump would be connected at the surface to the tubing string so as to selectively apply pressure via fluid in the conduit to the pump, raising the plunger assembly in the pump drawing reservoir fluid into the pump. When pressure via the surface pressure source is released, a gas source in the pump urges the plunger assembly downward in the pump urging the reservoir fluid in the pump into the tubing and to the surface. Preferably, the pump includes dampening mechanisms at both the top and bottom of the plungers stroke so as to reduce metal to metal impact within the pump. This dampening mechanism may include but is not limited to elastomer barriers, springs, and other dampening mechanisms such as discussed further below.

REFERENCES:
patent: 1946723 (1934-02-01), Thompson
patent: 2180366 (1939-11-01), Reichert
patent: 2384173 (1945-09-01), Johnston
patent: 2562584 (1951-07-01), Soberg
patent: 4013385 (1977-03-01), Peterson
patent: 4297087 (1981-10-01), Akkerman
patent: 4297088 (1981-10-01), Akkerman
patent: 4540348 (1985-09-01), Soderberg
patent: 4720247 (1988-01-01), Strickland et al.

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