Linear motor-pump assembly and method of using same

Details Linear motor-pump assembly and method of using same Linear motor-pump assembly and method of using same

1991-09-16

1993-10-12

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

417418, F04B 1704, F04B 3504

Patent

active

052520439

ABSTRACT:
A new and improved linear motor-pump assembly and method of using it for downhole use. The assembly includes a cartridge unit with a linear motor attached threadably between a discharge housing assembly adapted to be secured removably to a cable for hoisting the cartridge unit through the production tubing of a well and a suction housing assembly for facilitating the pumping of well fluids from a downhole well. The linear motor includes a mover adapted to engage threadably a stop valve for permitting one-way flow of fluid through the mover and into the discharge housing for discharge into the production tubing. For increased pumping efficiency, the suction housing and check valve are replaceable with a lifting pump and piston respectively. Thus, the assembly is usable in both shallow and deep wells.

REFERENCES:
patent: 1822242 (1931-09-01), Schongut
patent: 3364864 (1968-01-01), Gheorghe
patent: 4687054 (1987-08-01), Russell et al.
patent: 4768595 (1988-09-01), Smith
patent: 4815949 (1989-03-01), Rabson
patent: 5049046 (1991-09-01), Escue et al.

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