Downhole pneumatic pump with variable bouyant actuator

Details Downhole pneumatic pump with variable bouyant actuator Downhole pneumatic pump with variable bouyant actuator

1996-02-26

1997-09-02

Thorpe, Timothy

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417131, 137393, 137429, F04B 908

Patent

active

056624603

ABSTRACT:
A pneumatic pump having a variable buoyant actuator to substantially reduce the volume of a float, thereby increasing the fluid capacity for any pump of a given size. The pump includes an elongated housing, a sealable fluid entry aperture and a pipe communicating between an interior and an exterior of the housing. The housing includes a bottom wall and a cylindrical side wall extending from the bottom wall and terminating in an opening. A switchable valve control having a pod closes the opening. The pod has a plurality of valve seats and a plurality of corresponding valve elements, with the plurality of valve seats defining fluid inlet and output ports. The actuator is coupled to alternatingly placed valve elements in sealing engagement with fluid inlet and outlet ports in response to a level of fluid in the housing. The variable buoyant actuator includes first buoyant member disposed proximate to the bottom wall, and a buoyant amplifier disposed opposite to the first buoyant member, proximate to the pod. The first buoyant member is typically a cup or other similar receptacle, and the buoyant amplifier may be either an air-trap or a conventional float.

REFERENCES:
patent: 1261351 (1918-04-01), Bradbear
patent: 1763628 (1930-06-01), Coulombe

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