Pumps – Motor driven – Fluid motor
Patent
1990-03-29
1991-11-12
Bertsch, Richard A.
Pumps
Motor driven
Fluid motor
92151, 92163, F02B 3502
Patent
active
050643550
ABSTRACT:
A deep well pump for positioning in a bottom hole assembly and having at least one fluid pump and at least two fluid powered motors with the pump and motor pistons carried in alignment on the piston rod. The pump includes passages for delivering a power fluid to one end of each of the motor cylinders and for receiving exhaust fluid from the other end of the motor cylinders, and a valve for reversing this operation. A first sleeve is positioned around the first motor cylinder defining a power fluid path from one end of the first cylinder to one end of the second cylinder, a second sleeve is positioned around the first sleeve defining an exhaust fluid path from the other end of the first motor cylinder, and a third sleeve is positioned around the second motor cylinder defining an exhaust fluid path from the other end of the second motor cylinder, with the first and second exhaust fluid paths interconnected. When the valve reverses the operation, the power fluid paths become exhaust fluid paths and the exhaust fluid paths become power fluid paths.
REFERENCES:
patent: 2081222 (1934-04-01), Coberly
patent: 2311157 (1943-02-01), Coberly
patent: 2338903 (1944-01-01), Coberly
patent: 3030893 (1962-04-01), Shaffer
patent: 3168853 (1965-02-01), Prince
patent: 3650640 (1972-03-01), Roeder
patent: 3653786 (1972-04-01), McArthur et al.
patent: 4080111 (1978-03-01), Roeder
patent: 4084923 (1978-04-01), Roeder
patent: 4118154 (1978-10-01), Roeder
patent: 4268227 (1981-05-01), Roeder
patent: 4664186 (1987-05-01), Roeder
Theory and Application of Hydraulic Oil Well Pump by C. J. Coberly, published by Kobe, Inc., Huntington Park, Calif., 6/1961, chapters 3 and 7.
National Supply Company Tandem Engine, Sheets H81.02 & LD563.
Dillon David B.
Kelleher John M.
Bertsch Richard A.
Kocharov Michael I.
Trico Industries, Inc.
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