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    CUT-OFF FREQUENCY ADJUSTMENT FOR MICROWAVE RESONATOR
    55.
    发明授权
    CUT-OFF FREQUENCY ADJUSTMENT FOR MICROWAVE RESONATOR 有权

    公开(公告)号：EP3152567B1

    公开(公告)日：2018-12-05

    申请号：EP15725050.7

    申请日：2015-05-29

    申请人： Roxar Flow Measurement AS

    发明人： NYFORS, Ebbe Gustaf

    IPC分类号： G01N33/28 ,  G01N22/00

    CPC分类号： G01N33/28 ,  G01N22/00 ,  G01N33/2847

    摘要： The present invention relates to a sensor assembly for measuring dielectric properties in a hydrocarbon fluid flow in a pipe, especially measuring salinity of said flow, comprising a microwave cavity resonator being adapted to be positioned in the wall of said pipe, and being designed to operate at a chosen resonant frequency. The sensor assembly also comprises a metallic plate at a distance from said sensor, wherein the plate defines a waveguide enclosing the microwave cavity resonator, the waveguide being open along the axis of the pipe for allowing said flow to pass through, the waveguide having a cutoff frequency being higher than the resonant frequency of the microwave cavity resonator.

    DOWNHOLE GAUGE ASSEMBLY
    56.
    发明授权
    DOWNHOLE GAUGE ASSEMBLY 有权

    公开(公告)号：EP2756154B1

    公开(公告)日：2018-07-25

    申请号：EP12755877.3

    申请日：2012-09-07

    申请人： Roxar Flow Measurement AS

    发明人： SØRENSEN, Per Hassel ,  BAUSTAD, Terje

    IPC分类号： E21B17/02 ,  H01R4/26

    CPC分类号： E21B47/06 ,  E21B17/023 ,  H01R13/58

    摘要： Downhole gauge (1) assembly comprising a gauge housing (3) with a receiving aperture (32) having a sealing means (30) with an inner sealing surface (8). A gauge (4) is arranged in or in association to the gauge housing (3), a metal cable (7) with an inner bore is in communication with the interior of the housing (3). The cable runs from a downhole location to the top of a subsurface well. An electrical or optical conductor (9a, 9b) runs through the bore of the metal cable. The conductor (9a, 9b) is connected to the gauge (4) through a connector (5). The electrical or optical connector (5) is arranged within the gauge housing (3) and has been passed through said receiving aperture (32) of the gauge housing (3). The inner sealing surface (8) seals on the outer surface of the metal cable (7).

    SYSTEM FOR MEASURING CHARACTERISTICS OF A FLUID FLOW
    57.
    发明公开
    SYSTEM FOR MEASURING CHARACTERISTICS OF A FLUID FLOW 审中-公开

    公开(公告)号：EP3286561A1

    公开(公告)日：2018-02-28

    申请号：EP16717609

    申请日：2016-04-15

    申请人： ROXAR FLOW MEASUREMENT AS

    发明人： NYFORS EBBE GUSTAF

    IPC分类号： G01N33/28 ,  G01F1/58 ,  G01F1/66 ,  G01N22/00

    CPC分类号： G01N27/04 ,  G01N22/00 ,  G01N22/04 ,  G01N33/0036 ,  G01N33/18 ,  G01N33/2823 ,  G01N33/2847

    摘要： The present invention relates to a system for measuring electrical characteristics of a fluid flowing through a section of a pipe, the system comprising a coaxial resonator, formed by an essentially coaxial insert in said pipe defining an annular volume between a chosen part of said insert and the pipe wall, said insert and pipe wall being made from an electrically conductive material, the system further comprising at least one antenna adapted to emit electromagnetic signals into and receive electromagnetic signals from said coaxial resonator, and means to measure the frequency response of said coaxial resonator within a frequency range including the waveguide mode TE11 of said coaxial resonator, The coaxial insert is mounted to the pipe wall through at least one support leg being positioned outside said annular volume, and one electrically conductive fin is positioned at least partially in the annular volume, said fin being positioned in a radial plane, said plane being different from the plane of said at least one antenna and the axis of said annular volume.