E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 43/12 (2006.01) E21B 47/00 (2006.01) E21B 47/06 (2006.01) F04B 47/02 (2006.01) F04B 49/02 (2006.01) F04B 49/06 (2006.01) G05D 7/06 (2006.01) G01F 1/68 (2006.01) G01F 1/69 (2006.01)
Patent
CA 2445296
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 includes 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 the pump control signal continuously varies a predetermined parameter for controlling the flow rate of a pumping unit during operation of the pumping unit.
Bevan Stuart F.
Lownie Timothy
1273941 Ontario Inc.
Gowling Lafleur Henderson Llp
LandOfFree
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