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    System and Method to Measure or Generate an Electrical Field Downhole
    1.
    发明申请
    System and Method to Measure or Generate an Electrical Field Downhole 审中-公开

    公开(公告)号：US20180299576A1

    公开(公告)日：2018-10-18

    申请号：US16018599

    申请日：2018-06-26

    申请人： GroundMetrics, Inc.

    发明人： Andrew HIBBS ,  Eli GLEZER

    IPC分类号： G01V3/20 ,  E21B47/10 ,  G01V3/26

    CPC分类号： G01V3/20 ,  E21B47/102 ,  G01V3/26

    摘要： The invention relates to measuring and generating electrical fields downhole. In one embodiment a system is provided that includes an amplifier connected to a first electrode in electrical contact with the Earth via an operative capacitive coupling. An additional electrode and amplifier are disposed in the borehole opposite the first electrode and constitute a first pair of electrodes spaced in a direction orthogonal to the axis. A second electrode is part of a group of counter electrodes spaced from each other and disposed outside the borehole. The first pair of electrodes and the amplifiers are configured to be one of a source that generates an electrical field in a direction substantially orthogonal to the axis of the borehole and a sensor that measures an electric field substantially orthogonal to the axis of the borehole.

    Fiber Optic Sensing Using Soluble Layers
    2.
    发明申请
    Fiber Optic Sensing Using Soluble Layers 审中-公开

    公开(公告)号：US20180252555A1

    公开(公告)日：2018-09-06

    申请号：US15517071

    申请日：2015-11-24

    申请人： HALLIBURTON ENERGY SERVICES, INC.

    发明人： Michel LeBLANC ,  Neal G. SKINNER ,  William C. PEARL ,  Megan R, PEARL

    IPC分类号： G01D5/353 ,  G02B6/02 ,  G02B6/44 ,  E21B47/10

    CPC分类号： G01D5/3537 ,  E21B47/00 ,  E21B47/10 ,  E21B47/102 ,  G02B6/00 ,  G02B6/02076 ,  G02B6/4428

    摘要： Optical sensors having one or more soluble coatings thereon are used to detect the presence of a degrading fluid. In a generalized embodiment, the fiber optic sensor includes a fiber optic cable having two strain sensor positioned therein. A soluble layer is positioned over one of the strain sensor. Due to the presence of the soluble layer, the covered strain sensor optically responds differently than the other strain sensor to changes in pressure, strain and temperature. In the presence of a degrading fluid, the soluble layer degrades and ultimately dissolves, thereby changing the optical response of the previously covered strain sensor. When the soluble layer is dissolved, the strain induced by the soluble layer relaxes, thus causing a wavelength shift in the signal of the grating. By monitoring the wavelength shifts of both strain sensors, the fiber optic sensor acts as a detector for the presence of the degrading fluid.

    Moveable Assembly for Simultaneous Detection of Analytic and Compensation Signals in Optical Computing
    7.
    发明申请
    Moveable Assembly for Simultaneous Detection of Analytic and Compensation Signals in Optical Computing 审中-公开

    公开(公告)号：US20180112526A1

    公开(公告)日：2018-04-26

    申请号：US15559343

    申请日：2015-04-23

    申请人： Halliburton Energy Services, Inc.

    发明人： David L. PERKINS ,  Robert ATKINSON

    IPC分类号： E21B49/08

    CPC分类号： E21B49/08 ,  E21B47/011 ,  E21B47/102 ,  E21B47/122 ,  E21B2049/085 ,  G01N21/255 ,  G01N21/55 ,  G01N21/59 ,  G01N21/85

    摘要： An optical computing device uses a moveable assembly to simultaneously analytic and compensation signals to determine sample characteristics in real-time. In one embodiment, the moveable assembly is a rotating carousel including at least one optical element pair positioned thereon, where one of the optical elements forms an analytic channel, and the other forms the compensation channel. Alternatively, two carousels may be utilized, where one includes the analytic channel and the other includes the compensation channel. In another embodiment, a linear array having compensation and analytic channels may be utilized. During operation, electromagnetic radiation optically interacts with the sample to form sample-interacted light, which is directed toward the optical elements on the moveable assembly. The optical elements are positioned on the moveable assemblies such that the sample-interacted light optically interacts with both simultaneously, thereby providing compensation in parallel with the sample characteristic measurement.

    Compression and transmission of measurements from downhole tool
    9.
    发明授权
    Compression and transmission of measurements from downhole tool 有权

    公开(公告)号：US09932824B2

    公开(公告)日：2018-04-03

    申请号：US14919426

    申请日：2015-10-21

    申请人： Schlumberger Technology Corporation

    发明人： Bo Yu ,  Kai Hsu ,  Julian Pop ,  Kentaro Indo

    IPC分类号： G01V3/00 ,  E21B47/12

    CPC分类号： E21B47/123 ,  E21B47/102 ,  E21B47/18

    摘要： A method for transmitting data from a downhole tool is provided. In one embodiment, the method includes acquiring data for a formation fluid through downhole fluid analysis with a downhole tool in a well. The acquired data can include optical spectrum data measured with a spectrometer and other data. The method also includes generating time blocks of the acquired data and transmitting the time blocks from the downhole tool. More particularly, generating the time blocks may include compressing at least some of the optical spectrum data according to a first compression technique and compressing at least some of the other data according to one or more additional compression techniques. The compressed data can be packaged into the time blocks such that at least some of the time blocks include both compressed optical spectrum data and compressed other data for the formation fluid. Additional methods, systems, and devices are also disclosed.