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    Downhole Electrochemical Fluid Sensor and Method of Using Same
    1.
    发明申请
    Downhole Electrochemical Fluid Sensor and Method of Using Same 审中-公开
    井下电化学流体传感器及其使用方法

    公开(公告)号：US20150167445A1

    公开(公告)日：2015-06-18

    申请号：US14109786

    申请日：2013-12-17

    Applicant: Schlumberger Technology Corporation

    Inventor： Laurent Pirolli ,  Gary Martin Oddie ,  Andrew Meredith ,  Nathan S. Lawrence ,  Kay McGuinness ,  John Collins

    IPC: E21B47/00

    CPC classification number: E21B47/00 ,  G01N27/4045 ,  G01N33/0044

    Abstract: An electrochemical fluid sensor for a downhole production tool positionable in a wellbore penetrating a subterranean is provided. The wellbore has a downhole fluid therein. The electrochemical fluid sensor includes a sensor housing positionable in the downhole tool, a sensing solution positionable in the housing (the sensing solution including a mediator reactive to target chemicals), a gas permeable membrane to fluidly isolate the downhole fluid from the sensing solution (the gas permeable membrane permitting the passage of gas to the sensing solution), and a plurality of electrodes positioned about the housing a distance from the gas permeable membrane to measure reaction by the sensing solution whereby downhole parameters may be determined.

    Abstract translation: 提供了一种用于井下生产工具的电化学流体传感器，其可定位在穿透地下的井眼中。 井筒内有一个井下流体。 电化学流体传感器包括可定位在井下工具中的传感器壳体，可定位在壳体中的感测溶液（包括与目标化学物质反应的介质的感测溶液），用于将井下流体与感测溶液流体隔离的透气膜 透气膜，允许气体通过感测溶液）和多个电极，其围绕壳体设置距透气膜一定距离，以测量感测溶液的反应，从而可以确定井下参数。

    ELECTROCHEMICAL SENSOR FOR PH MEASUREMENT
    2.
    发明申请
    ELECTROCHEMICAL SENSOR FOR PH MEASUREMENT 审中-公开
    电化学传感器用于PH测量

    公开(公告)号：US20140332411A1

    公开(公告)日：2014-11-13

    申请号：US14365625

    申请日：2012-12-24

    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

    Inventor： Nathan Lawrence ,  Andrew Meredith

    IPC: G01N27/30

    CPC classification number: G01N27/302

    Abstract: A method of determining the pH of an aqueous liquid which contains little or no buffer, such as does not contain more than 0.01 moles per litre of pH-buffering partially dissociated acid, base and/or salt, uses an electrode with at least one redox active compound immobilized thereon convertible electrochemically between reduced and oxidized forms with transfer of at least one proton between the compound and the aqueous liquid. Varying potential is applied to the electrode, observing current flow as potential is varied, determining the applied potential at a maximum current for redox reaction of the compound, and determining pH from the potential at maximum current. The electrode has a covering layer which separates the redox active compound from the aqueous liquid but selectively allows the passage of hydrogen ions between the redox active compound and the aqueous liquid. The presence of the covering layer enhances accuracy of the measurement of pH of the aqueous liquid.

    Abstract translation: 确定含有很少或没有缓冲液的水性液体的pH值的方法，例如不超过0.01摩尔每升pH缓冲部分解离的酸，碱和/或盐，使用具有至少一种氧化还原电极 固定在其上的活性化合物在还原和氧化形式之间电化学转化，同时在化合物和含水液体之间转移至少一个质子。 对电极施加不同的电位，随着电位的变化观察电流，确定化合物的氧化还原反应的最大电流下的施加电位，并从最大电流的电位测定pH。 电极具有将氧化还原活性化合物与水性液体分离的覆盖层，但是选择性地允许氢氧离子在氧化还原活性化合物和含水液体之间通过。 覆盖层的存在提高了水性液体的pH的测量的准确性。

    Erosion and wear resistant sonoelectrochemical probe
    4.
    发明授权
    Erosion and wear resistant sonoelectrochemical probe 有权

    公开(公告)号：US10386320B2

    公开(公告)日：2019-08-20

    申请号：US14279263

    申请日：2014-05-15

    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

    Inventor： Clive E. Hall ,  Li Jiang ,  Timothy G. J. Jones ,  Andrew Meredith ,  Nathan S. Lawrence ,  Markus Pagels

    IPC: G01N27/30 ,  G01N27/38 ,  G01N27/26

    Abstract: The present invention, in one set of embodiments, provides methods and systems for integrating conducting diamond electrodes into a high power acoustic resonator. More specifically, but not by way of limitation, in certain embodiments of the present invention, diamond electrodes may be integrated into a high power acoustic resonator to provide a robust sensing device that may provide for acoustic cleaning of the electrodes and increasing the rate of mass transport to the diamond electrodes. The diamond electrodes may be used as working, reference or counter electrodes or a combination of two or more of such electrodes. In certain aspects, the high power acoustic resonator may include an acoustic horn for focusing acoustic energy and the diamond electrodes may be coupled with the acoustic horn.

    Downhole Electrochemical Sensor and Method of Using Same
    5.
    发明申请
    Downhole Electrochemical Sensor and Method of Using Same 有权
    井下电化学传感器及其使用方法

    公开(公告)号：US20150122487A1

    公开(公告)日：2015-05-07

    申请号：US14072795

    申请日：2013-11-06

    Applicant: Schlumberger Technology Corporation

    Inventor： Nathan S. Lawrence ,  Andrew Meredith ,  Kay McGuinness ,  Markus Pagels ,  Timothy G. J. Jones ,  Andrew Howe ,  Richard Ferguson

    IPC: E21B47/06 ,  E21B47/00

    CPC classification number: E21B47/06 ,  E21B47/00 ,  E21B49/08 ,  E21B2049/085

    Abstract: An electrochemical sensor of a downhole tool positionable in a wellbore penetrating a subterranean formation is provided. The downhole tool has a flowline to receive downhole fluid. The electrochemical sensor includes a bulkhead carried by the downhole tool, a membrane exposed to the downhole fluid in the flowline, and an electrochemical cell supported by the bulkhead about the membrane. The electrochemical cell includes a plurality of cell sensors, at least one cell electrode, and a sensing solution. The plurality cell sensors include an analyte sensor, a temperature sensor, and a pH sensor. The sensing solution is reactive to certain analytes in the downhole fluid to generate electrical signals measurable by the plurality of cell sensors whereby parameters of chemicals in the downhole fluid may be measured.

    Abstract translation: 提供了一种位于穿透地下地层的井眼中的井下工具的电化学传感器。 井下工具具有接收井下流体的流线。 电化学传感器包括由井下工具承载的舱壁，暴露于流动管线中的井下流体的膜以及围绕隔膜由隔板支撑的电化学电池。 电化学电池包括多个电池传感器，至少一个电池电极和感测溶液。 多个单元传感器包括分析物传感器，温度传感器和pH传感器。 感测解决方案对井下流体中的某些分析物是反应的，以产生可由多个单元传感器测量的电信号，从而可以测量井下流体中的化学物质的参数。

    Viscosification of aqueous solutions
    9.
    发明授权
    Viscosification of aqueous solutions 有权

    公开(公告)号：US11248162B2

    公开(公告)日：2022-02-15

    申请号：US16824224

    申请日：2020-03-19

    Applicant: Schlumberger Technology Corporation

    Inventor： Jesús Del Barrio ,  Robert Seth Hartshorne ,  Trevor Lloyd Hughes ,  Andrew Meredith

    IPC: C09K8/68 ,  C09K8/80 ,  C09K8/74 ,  C09K8/88

    Abstract: A viscosified aqueous solution, optionally for use in a subterranean wellbore, is made by reacting in aqueous solution (i) an initial polymer with either carboxylic acid or amino groups on its polymer chain, (ii) a second compound with an amino group or carboxylic acid group, and (iii) a coupling agent, so that molecules of the second compound join to the polymer chain through amide groups, thereby forming an aqueous solution of a modified polymer which, without separation from the aqueous solution, participates in cross-linking thereby enhancing viscosity of the solution. The second compound may include hydrophobic groups so that the modified polymer contains hydrophobic groups and is able to cross-link with itself or a viscoelastic surfactant through association of hydrophobic groups (without covalent bond formation) in aqueous solution. Such cross-links can reform after the fluid has been subjected to shear.

    VISCOSIFICATION OF AQUEOUS SOLUTIONS
    10.
    发明申请
    VISCOSIFICATION OF AQUEOUS SOLUTIONS 审中-公开

    公开(公告)号：US20200299569A1

    公开(公告)日：2020-09-24

    申请号：US16824224

    申请日：2020-03-19

    Applicant: Schlumberger Technology Corporation

    Inventor： Jesús Del Barrio ,  Robert Seth Hartshorne ,  Trevor Lloyd Hughes ,  Andrew Meredith

    IPC: C09K8/68 ,  C09K8/74 ,  C09K8/80

    Abstract: A viscosified aqueous solution, optionally for use in a subterranean wellbore, is made by reacting in aqueous solution (i) an initial polymer with either carboxylic acid or amino groups on its polymer chain, (ii) a second compound with an amino group or carboxylic acid group, and (iii) a coupling agent, so that molecules of the second compound join to the polymer chain through amide groups, thereby forming an aqueous solution of a modified polymer which, without separation from the aqueous solution, participates in cross-linking thereby enhancing viscosity of the solution. The second compound may include hydrophobic groups so that the modified polymer contains hydrophobic groups and is able to cross-link with itself or a viscoelastic surfactant through association of hydrophobic groups (without covalent bond formation) in aqueous solution. Such cross-links can reform after the fluid has been subjected to shear.

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