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Heart Surgery

Well-pump-actuated-by-natural-gas

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Well pump actuated by natural gas

Details

Inventors: Jordan, Robert A.; Nystrom, William D.;
Assignee:
Primary Examiner: Freay; Charles G.
Assistant Examiner: Torrente; David J.
Attorney, Agent or Firm: Wilson; Ray G.

A pneumatic pump pumps liquids from natural gas wells. First and second pneumatic rams have first and second pistons housed in first and second cylinders with a lifting beam connecting the first and second pistons above the first and second cylinders and connectable to sucker rods for lifting liquids from a well. First and second gas connections are provided beneath the first and second pistons in the first and second cylinders. First valves are connected to the first and second gas connections to introduce compressed gas beneath the first and second pistons for raising the lifting beam during an upstroke of the sucker rods and a first control valve regulates the up-stroke rate of the lifting beam. Second valves are connected to the first and second gas connections to exhaust gas beneath the first and second pistons for lowering the lifting beam during a down-stroke of the sucker rods and a second control valve regulates the down-stroke rate of the lifting beam.

DETAILED DESCRIPTION In accordance with the purposes of the present invention, as embodied and broadly described herein, the present invention is directed to a pneumatic pump for pumping liquids from natural gas wells.
First and second pneumatic rams have first and second pistons housed in first and second cylinders with a lifting beam connecting the first and second pistons above the first and second cylinders and connectable to sucker rods for lifting liquids from a well.
First and second gas connections are provided beneath the first and second pistons in the first and second cylinders.
First valves are connected to the first and second gas connections to introduce compressed gas beneath the first and second pistons for raising the lifting beam during an up-stroke of the sucker rods and a first control valve regulates the up-stroke rate of the lifting beam.
Second valves are connected to the first and second gas connections to exhaust gas beneath the first and second pistons for lowering the lifting beam during a down-stroke of the sucker rods and a second control valve regulates the down-stroke rate of the lifting beam.

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