Sonic pump off detector

Details Sonic pump off detector Sonic pump off detector

1978-06-19

1979-10-16

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 36, F04B 4900

Patent

active

041711858

ABSTRACT:
Pump off conditions of an oil well are determined by listening to the sonic clicks of the traveling valve and bottom hole valve. If the clicks do not occur within a certain period after top dead center for successive pump cycles, the well is assumed to be pumped off and is shut down. If, upon being restarted for a successive number of times, the valves do not click within the proper time frame it is assumed that there has been a pump failure and the well is shut down until manually restarted.

REFERENCES:
patent: 3091179 (1963-05-01), Eikols
patent: 3918843 (1975-11-01), Douglas et al.
patent: 3938910 (1976-02-01), Douglas
patent: 4121094 (1978-10-01), Diuito

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