Controller for oil wells using a heated probe sensor

Details Controller for oil wells using a heated probe sensor Controller for oil wells using a heated probe sensor

F - Mech Eng,Light,Heat,Weapons

04

B

F04B 49/06 (2006.01) E21B 47/00 (2012.01) F04B 47/00 (2006.01) F04B 47/02 (2006.01) G01F 1/684 (2006.01) G01F 1/696 (2006.01) G05D 7/06 (2006.01)

Patent

CA 2240606

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.

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