Title:
FLUID CONTROLLED PUMPING SYSTEM AND METHOD
Document Type and Number:
WIPO Patent Application WO2002086322
Kind Code:
A3
Abstract:
A fluid controlled pumping system includes a pumping unit (12) disposed within a fluid cavity (13). The pumping unit (12) includes a passage (60) extending to a suction end of the pumping unit. The system also includes a pressure source (72) coupled to the passage (60) and operable to force a fluid outwardly from the passage proximate to the suction end (34) of the pumpimg unit. The system includes a pressure sensor (74) coupled to the passage (60). The system further includes a controller (76) coupled to the pumping unit (12) and operable to regulate an operating parameter of the pumping unit using the fluid pressure. A fluid level controlled pumping system includes a pumping unit (106) disposed within a fluid cavity. The pumping unit includes an inlet (118) operable to receive a fluid to be pumped from the fluid cavity. The system also includes a valve (140) slidably coupled to the pumping unit. The valve (140) includes a passage (160) for receiving pumped fluid from an outlet (122) of the pumping unit. In response to a decreasing fluid level within the fluid cavity, movement of the valve relative to the pumping unit aligns the passage (160) with a port (190) of the pumping unit to recirculate the pumped fluid from the outlet to the inlet.
Inventors:
ZUPANICK JOSEPH A
RIAL MONTY H
RIAL MONTY H
Application Number:
PCT/US2002/012751
Publication Date:
April 17, 2003
Filing Date:
April 23, 2002
Export Citation:
Assignee:
CDX GAS LLC (US)
International Classes:
F04C2/16; E21B47/00; F04B15/02; F04B47/02; F04B49/00; F04B49/10; F04C13/00; F04C14/00; F04C14/08; F04C14/24; F04C14/28; F04D15/02; (IPC1-7): F04C13/00; E21B47/00; F04B47/02; F04C15/04; F16K31/18
Foreign References:
| US6048175A | 2000-04-11 | |||
| US5941305A | 1999-08-24 | |||
| US4718824A | 1988-01-12 | |||
| US4125163A | 1978-11-14 | |||
| US5782608A | 1998-07-21 | |||
| US4614232A | 1986-09-30 |
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