Downhole pump speed control

Details Downhole pump speed control Downhole pump speed control

1976-09-17

1978-02-28

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

By control of electric or magnetic drive motor

417 46, 417 53, F04B 4900

Patent

active

040764575

ABSTRACT:
This is a method and apparatus for controlling a downhole, hydraulically actuated pump. Two fluid flow monitoring means generate signals which are a function of the power fluid flow rate to the downhole pump and the return fluid flow rate from the well. An automatic controller causes the power fluid flow rate to be maintained essentially directly proportional to the return flow. Thus, the power fluid flow is not varied in the opposite direction of any change in return flow to maintain the return fluid flow constant, but conversely, is changed in a manner which will tend to accentuate any changes in the return fluid flow.

REFERENCES:
patent: 2180400 (1939-11-01), Coberly
patent: 2224295 (1940-12-01), Hofer
patent: 2269189 (1942-01-01), Downs
patent: 2593729 (1952-04-01), Coberly
patent: 2637276 (1953-05-01), Coberly
patent: 3434370 (1969-01-01), Law
patent: 3535053 (1970-10-01), Jednacz
patent: 3570243 (1971-03-01), Comer et al.

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