Long stroke deep well pumping unit

Details Long stroke deep well pumping unit Long stroke deep well pumping unit

1990-05-09

1991-05-28

Kwon, John T.

Power plants

Pressure fluid source and motor

Cyclically operable reciprocating or oscillating motor or...

60371, 417400, 74 8922, 74110, 92117A, 92137, F16D 3102

Patent

active

050183508

ABSTRACT:
A long stroke deep well pumping unit which employs a fluid motor connected with a polish rod by using a plurality of belts, fixed at either end, to reciprocate the sucker rod through repeated long strokes with a minimum of stress and shock to the sucker rod during directional change.

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patent: 4497616 (1985-02-01), Ratell
patent: 4651582 (1987-03-01), Bender
patent: 4872360 (1989-10-01), Lew

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