System and method for controlling pumping of non-homogenous...

Details System and method for controlling pumping of non-homogenous... System and method for controlling pumping of non-homogenous...

2006-05-16

2006-05-16

Freay, Charles (Department: 3746)

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

C417S022000, C417S032000, C073S204110, C073S204150

Reexamination Certificate

active

07044714

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.

REFERENCES:
patent: 5984641 (1999-11-01), Bevan et al.

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