Reciprocating drive and velocity control for long stroke well pu

Details Reciprocating drive and velocity control for long stroke well pu Reciprocating drive and velocity control for long stroke well pu

1983-08-30

1985-01-29

Look, Edward K.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 17, 417 42, 74 8922, F04B 4900

Patent

active

044962851

ABSTRACT:
A yo-yo variety reciprocating drive for long stroke, well pumping units, which employ a flexible element as the operative link between the winding drum and the polish rod of the well pump. Reversal from an upstroke to a downstroke is cushioned by mechanism which provides a power source off dwell period of predetermined duration during the aforesaid stroke exchange and is adjustable to control the length of stroke of the pumping unit. A velocity control senses the velocity of the polish rod during such dwell period and re-energizes the power source when a predetermined velocity is achieved following reversal of direction.

REFERENCES:
patent: 1970596 (1934-08-01), Coberly
patent: 3345950 (1967-10-01), Bender
patent: 3483828 (1969-12-01), Bender
patent: 3737751 (1973-06-01), Lima
patent: 4191915 (1980-03-01), Johansson
patent: 4391155 (1983-07-01), Bender

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