Method and apparatus for pressure based mass flow control

    公开(公告)号:US12000723B2

    公开(公告)日:2024-06-04

    申请号:US17651751

    申请日:2022-02-18

    Inventor: Junhua Ding

    Abstract: Mass flow controllers that can provide for improved bleeding time and can be manufactured with less complexity and cost are provided. A mass flow controller includes a body having a valve outlet bore defining a flow path and an adjustable valve configured to control flow of a gas through the flow path. A valve element includes an outlet orifice of the adjustable valve and is disposed within the bore. The mass flow controller further includes a pressure drop element disposed coaxially with the valve element within the bore. An upstream pressure sensor is configured to detect a pressure at a location in the flow path between the adjustable valve and the pressure drop element, and a controller is configured to determine a flow rate through the flow path based on pressure as detected by the upstream pressure sensor.

    DRILLING MUD FLOW METERING SYSTEM AND METHOD

    公开(公告)号:US20230266155A1

    公开(公告)日:2023-08-24

    申请号:US17678524

    申请日:2022-02-23

    CPC classification number: G01F1/84 E21B21/08 G01F1/88 G01F1/40

    Abstract: A mud flow measurement system includes a flow pipe, a Coriolis meter, a differential pressure sensor, and a mud flow measurement module. The mud flow measurement module is configured to select a calibration curve corresponding to a drilling mud injected into the well, determine a measured density based on the signal from each of the vibration sensors and the selected calibration curve, determine a differential pressure across the Coriolis meter from the differential pressure sensor, and compute a calculated mass flow rate, Qmass, of the multiphase mud flow using equation






    Q
    mass

    =




    C
    d



    A
    t




    1
    -

    β
    4







    2

    ρ
    *
    Δ

    P




    ,




    where Cd is a calibration constant, At is a cross-sectional area of the measurement tube, β is a ratio of the internal diameters of the flow pipe the measuring tube, ρ is the density of the multiphase mud, and ΔP is the differential pressure across the Coriolis meter, where ρ is the measured density determined from the Coriolis meter.

    Estimating flow rate at a pump
    9.
    发明授权

    公开(公告)号:US11428560B2

    公开(公告)日:2022-08-30

    申请号:US15765381

    申请日:2016-10-05

    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.

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