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    GRAVITY AND/OR ACCELERATION MEASUREMENTS USING DUAL INTERFEROMETER CONFIGURATIONS
    2.
    发明公开
    GRAVITY AND/OR ACCELERATION MEASUREMENTS USING DUAL INTERFEROMETER CONFIGURATIONS 审中-公开

    公开(公告)号：EP3194719A4

    公开(公告)日：2018-04-11

    申请号：EP15827817

    申请日：2015-07-29

    申请人： BAKER HUGHES INC

    发明人： CSUTAK SEBASTIAN

    IPC分类号： E21B47/00 ,  E21B49/00 ,  G01V7/04

    CPC分类号： G01V7/04

    摘要： An apparatus for estimating gravitational properties includes an optical source, a first interferometer including a fixed reference reflector and a first reflector coupled to a first moveable mass, a second interferometer including the fixed reference reflector and a second reflector coupled to a second moveable mass, a first detector configured to detect a first interference pattern generated by the first interferometer, and a second detector configured to detect a second interference pattern generated by the second interferometer. The first mass is configured to move a first amount in response to a change in gravitational force, and the second mass is configured to move a second amount in response to a change in gravitational force, the second amount being smaller than the first amount. The apparatus also includes a processor configured to estimate the change in gravitational force based on a combination of the first and second interference patterns.

    WAVELENGTH-SELECTIVE, HIGH TEMPERATURE, NEAR INFRARED PHOTODETECTORS FOR DOWNHOLE APPLICATIONS
    5.
    发明公开
    WAVELENGTH-SELECTIVE, HIGH TEMPERATURE, NEAR INFRARED PHOTODETECTORS FOR DOWNHOLE APPLICATIONS 审中-公开
    WELLENLÄNGENSELEKTIVE，HOCHTEMPERATUR-，NAHINFRAROT-FOTODETEKTORENFÜRBOHRLOCHANWENDUNGEN

    公开(公告)号：EP3052758A4

    公开(公告)日：2017-05-31

    申请号：EP14850992

    申请日：2014-10-03

    申请人： BAKER HUGHES INC

    发明人： DIFOGGIO ROCCO ,  CSUTAK SEBASTIAN

    IPC分类号： E21B49/08 ,  E21B47/00 ,  E21B47/10 ,  G01N21/31

    CPC分类号： E21B49/081 ,  E21B47/102 ,  E21B2049/085 ,  G01J3/10 ,  G01J3/36 ,  G01N21/359

    摘要： An apparatus for estimating a property of a downhole fluid includes a carrier configured to be conveyed through a borehole penetrating the earth, a fluid extraction device disposed at the carrier and configured to extract a sample of the downhole fluid, and a probe cell having a window to receive the sample. The apparatus further includes a light source to illuminate the sample through the window with light photons, and a photodetector to receive light photons through the window that have interacted with the downhole fluid and generate a signal indicative of an amount of the received light photons. The generated signal is indicative of the property. The photodetector has an optical cavity having a semiconductor that has a difference between a valence energy band and a conduction energy band for electrons that is greater than the energy of each of the received light photons.

    摘要翻译： 一种用于估计井下流体的性质的装置包括：承载器，被配置为通过穿透地球的钻孔被输送;流体抽取装置，被布置在承载器处并被配置为抽取井下流体的样本;探针单元，其具有窗口 接收样品。 该设备进一步包括光源，其通过具有光子光子的窗口照射样品，以及光电探测器，其接收通过窗口的光子，其已经与井下流体相互作用并产生指示所接收的光子量的信号。 生成的信号表示属性。 该光电探测器具有光学腔，该光学腔具有半导体，该半导体对于电子的价能带和传导能带之间的差值大于每个所接收的光子的能量。