PUMP FLOW ESTIMATION Russian patent published in 2020 - IPC G01F1/34 E21B47/08 

FIELD: measurement technology.

SUBSTANCE: method for determining an estimated flow rate of a fluid medium at a pump comprises: obtaining pressure and temperature measurements of fluid at the pump inlet, pressure and temperature of the fluid medium at the pump outlet, as well as power supplied to the pump system; determination of values representing either density of fluid medium and specific heat capacity of fluid medium, or specific fluid enthalpy, based on measurement results, as well as models of fluids and/or historical data; as well as calculation of estimated efficiency of pump and estimated flow rate of fluid medium based on supplied power, measured temperature values, measured pressure values, found value of density and found value of specific heat capacity or found value of specific enthalpy of fluid medium.

EFFECT: technical result is high measurement accuracy for viscous flows, such as heavy oil, when viscosity changes.

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