公开(公告)号：US11428560B2

公开(公告)日：2022-08-30

申请号：US15765381

申请日：2016-10-05

Applicant: STATOIL PETROLEUM AS

Inventor： Kjetil Fjalestad ,  Dinesh Krishnamoorthy

IPC: G01F1/88 ,  G01F1/74 ,  G01F1/34 ,  G01F1/86 ,  F04D13/10 ,  F04D15/00 ,  G01F15/02 ,  G01F25/10

Abstract: A method for determining an estimated flow rate of fluid flow in a pump comprises: obtaining measurements of the pressure and temperature of fluid at the intake to the pump, the pressure and temperature of the fluid at the discharge from the pump, and the electrical power supplied to the pump; determining values representing either the density of the fluid and the specific heat capacity of the fluid, or the specific fluid enthalpy based on measurements and/or historical data; and calculating an estimated efficiency of the pump and an estimated flow rate of the fluid based on the measured electrical power, the measured temperatures, the measured pressures, the determined value for density and the determined value for specific heat capacity or the determined value for specific fluid enthalpy.

公开(公告)号：US10125584B2

公开(公告)日：2018-11-13

申请号：US15036599

申请日：2013-11-14

Applicant: Statoil Petroleum AS

Inventor： Elvira Marie Bergheim Aske ,  Morten Fredriksen ,  Alexey Pavlov ,  Kjetil Fjalestad ,  Dinesh Krishnamoorthy ,  Petter Tøndel ,  Yilmaz Türkyilmaz

IPC: E21B43/12 ,  E21B21/08 ,  E21B34/06 ,  E21B47/06 ,  G05B15/02

Abstract: A method for operating an electrical submersible pump, ESP, lifted well, the method comprising: measuring a characteristic of the well or a characteristic of a device associated with the well; generating a first control signal for instructing a change in the operation of the ESP; generating a second control signal for instructing a change in the operation of a further device associated with the well; wherein a degree of change in each of the first and second control signals is dependent on the outcome of the measuring and on a known effect caused by sending at least one of said first control signal to the ESP or said second control signal to the further device associated with the well; and sending the first control signal to the ESP and the second control signal to the further device associated with the well.