Pumps – Motor driven – Fluid motor
Patent
1984-01-31
1986-05-27
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
417393, F04B 4708
Patent
active
045913200
ABSTRACT:
A rodless submersible down hole pumping unit for a producing oil and/or gas well and including in combination a submersible prime mover operably connected with a source of electrical power from the surface of the ground through a suitable electrical cable. A pressure fluid source, a fluid moving pump operably connected with the motor for actuation thereby, a shifting valve assembly operable between the fluid moving pump and a shift rod assembly for transmitting reciprocation to a piston rod, the piston rod cooperating with a product valve unit for drawing well fluid from the fluid reservoir of the oil and/or gas well into the interior of the apparatus and discharging the well from the interior of the apparatus into the well tubing during continued reciprocation of the piston rod whereby the well fluid may be delivered to the surface of the ground for recovery thereof.
REFERENCES:
patent: 2307566 (1943-01-01), Browne
patent: 2641187 (1953-06-01), Adams
patent: 3048115 (1962-08-01), Musser
patent: 3091181 (1963-05-01), Wolf
patent: 4084923 (1978-04-01), Roeder
patent: 4234295 (1980-11-01), Jensen
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