Pumps – Condition responsive control of pump drive motor – Responsive to pump or pump fluid temperature
Patent
1997-05-05
1999-11-16
Freay, Charles G.
Pumps
Condition responsive control of pump drive motor
Responsive to pump or pump fluid temperature
F04B 4910
Patent
active
059846410
ABSTRACT:
A controller for controlling the pump unit of an oil well includes a sensor having a first and second probe for placement in the flow of oil from the well bore. Each of the probes contains a heater. A constant power source is selectively connected to one of the heaters. Each of the probes also include a linear RTD at each of their tips respectively for generating a signal indicative of the temperature measured at each of the first and second probes. A control unit receives signals from the RTD's and determines a flow rate therefrom. A pump control signal is generated in response to the flow rate, wherein pump control signal continuously varies a predetermined parameter of a pumping unit during operation of the pumping unit.
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patent: 5824895 (1998-10-01), Itsuji
Bevan Stuart P.
Lownie Timothy
1273941 Ontario Inc.
Chari Santosh K.
Evora Robert Z.
Freay Charles G.
Orange John R. S.
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