Annular pump

Details Annular pump Annular pump

1997-09-12

2000-05-23

Thorpe, Timothy S.

Pumps

Motor driven

Fluid motor

F04B 4500

Patent

active

060659440

ABSTRACT:
A pump having a semi-rigid flexible outer tube with a sealed top and a sealed bottom, check valves at the top and bottom such that the outer tube is in fluid communication with the working fluid, an inner tube concentrically disposed within the outer tube, and a controlled source that applies pressure to expand the inner tube to apply a force to the working fluid in the annulus defined by the inner and outer tubes is used to pump viscous materials and/or slurries from the bottom of small diameter wells. The tubes are made from nonmetallic, elastic materials and can be inexpensively manufactured.

REFERENCES:
patent: 2931309 (1960-04-01), Bower

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