US Patent 6851480 Gas operated automatic, liquid pumping system for wells
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Patent abstract
An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design that releases shut in production gas below the pumping device and provides a positive pressure differential across the pumping device prior to valve opening.
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Patent Inventor Names
Charles H. Hunt0
Gerald L. Swoyer0
Paul M. Yaniga0
Richard J. Bordogna0
Date of Patent
February 8, 2005
0Patent Application Number
101184630
Date Filed
April 8, 2002
0Patent Primary Examiner
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US Patent 6851480 Gas operated automatic, liquid pumping system for wells
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