Pumps – Condition responsive control of pump drive motor – Having timer or delay means
Patent
1984-01-04
1985-04-02
Look, Edward K.
Pumps
Condition responsive control of pump drive motor
Having timer or delay means
417 18, 417 20, 417 44, 417 63, F04B 4900
Patent
active
045084882
ABSTRACT:
A device for automatically controlling the pumping of fluids from a well of the type using a walking beam and positive displacement pump to provide efficient utilization of the pumping equipment and energy required therefor, and to obtain efficient flow rates from the wall. A sensor detects the position of the walking beam at a predetermined position on the up-stroke of its pumping cycle and generates a signal to a control unit. A diaphram detects the pressure differential between the well casing pressure and the fluid delivery tube pressure. The diaphram moves a spring biased plunger which actuates a switch upon a predetermined pressure differential existing between the casing and delivery tube which sends a second signal to the control unit. The control unit upon receiving both signals maintains the pumping unit energizes until the pressure differential on the diaphram drops to a predetermined value preventing the plunger from actuating the switch. The control unit will deenergize the pumping unit if both signals are not received at the appropriate time. The sensitivity of the diaphram actuated switch is adjustable by changing the biasing force of the spring on the plunger.
REFERENCES:
patent: 2296833 (1942-09-01), Boynton
patent: 3266574 (1966-08-01), Gandy
patent: 3678997 (1972-07-01), Barchard
patent: 3851995 (1974-12-01), Mills
patent: 4118148 (1978-10-01), Allen
patent: 4119865 (1978-10-01), Elderton
patent: 4226284 (1980-10-01), Evans
patent: 4286925 (1981-09-01), Standish
Logan Industries & Services, Inc.
Look Edward K.
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