Pumps – Expansible chamber type – Relatively movable serial distributors
Patent
1983-04-21
1985-03-12
Freeh, William L.
Pumps
Expansible chamber type
Relatively movable serial distributors
417514, F04B 2102, F04B 3908
Patent
active
045041997
ABSTRACT:
A fluid pump for raising petroleum fluids through production tubing in completed oil wells includes two mechanically actuated valves, one of which moves longitudinally within the pump housing, and the other valve which rotates within the pump housing.
REFERENCES:
patent: 42705 (1864-05-01), Warren
patent: 456128 (1891-07-01), Darling
patent: 1567827 (1929-12-01), Zublin
patent: 1698163 (1929-01-01), MaGee
patent: 1784602 (1930-12-01), Kirkpatrick
patent: 2791970 (1957-05-01), Hunter
patent: 2933050 (1960-04-01), Crowl
patent: 3023710 (1962-03-01), Tyree
patent: 3612101 (1971-10-01), Pavlovich
patent: 3697199 (1972-10-01), Spears
Prior art cited in prior application of Harry L. Spears, Ser. No. _075,318, filed 9/13/79, status of application unknown.
Brochure of Watson International Oilfield Industries entitled _"The Watson Pump Kit".
Freeh William L.
Tobor Ben D.
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