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    • 3. 发明申请
    • ELECTRO-CHEMICAL SENSOR
    • 电化学传感器
    • WO2010026456A2
    • 2010-03-11
    • PCT/IB2009006637
    • 2009-08-26
    • SCHLUMBERGER TECHNOLOGY BVSCHLUMBERGER HOLDINGSSCHLUMBERGER CA LTDSCHLUMBERGER SERVICES PETROLPRAD RES & DEV LTDSCHLUMBERGER SEACO INCROBINSON KAYLAWRENCE NATHANMEREDITH ANDREW
    • ROBINSON KAYLAWRENCE NATHANMEREDITH ANDREW
    • G01N27/26G01N27/74
    • G01N33/24
    • The present invention provides an electrochemical sensor having a solid electrically conductive substrate and a compound immobilized thereon which has binding affinity for an analyte species to be detected and also displays electrochemical behaviour which is modified upon binding of that analyte species, so that binding of an analyte species can be detected by measuring electrochemical properties, such as by voltammetry. Desirably the immobilised compound contains both a first moiety with binding affinity for the analyte and a separate second moiety which is a redox system whose electrochemical oxidation/reduction properties become modified when the first moiety binds the analyte. The analyte binding moiety may be a diol or polyol and preferably is a sugar. The electrochemical sensor finds use in methods of analysing reservoir and process fluids, particularly at a subterranean location. The electrochemical sensor may be a component of a downhole tool, adapted for deployment downhole.
    • 本发明提供了一种电化学传感器,其具有固体导电基体和固定在其上的化合物,该化合物对待检测的分析物种类具有结合亲和力,并且还显示出在结合该分析物种类时被修饰的电化学行为,从而使分析物 物种可以通过测量电化学性质,例如伏安法来检测。 理想地,固定的化合物含有对分析物具有结合亲和力的第一部分和分离的第二部分,该第二部分是当第一部分结合分析物时其电化学氧化/还原性质被改变的氧化还原系统。 分析物结合部分可以是二醇或多元醇,并且优选是糖。 电化学传感器可用于分析储层和过程流体的方法,特别是在地下位置。 电化学传感器可以是适用于井下部署的井下工具的部件。
    • 5. 发明申请
    • CALIBRATION OF ELECTROCHEMICAL SENSOR
    • 电化学传感器的校准
    • WO2011073746A3
    • 2011-10-13
    • PCT/IB2010002747
    • 2010-10-25
    • SCHLUMBERGER TECHNOLOGY BVSCHLUMBERGER HOLDINGSSCHLUMBERGER CA LTDSCHLUMBERGER SERVICES PETROLPRAD RES & DEV LTDSCHLUMBERGER SEACO INCLAWRENCE NATHAN
    • LAWRENCE NATHAN
    • G01N27/26E21B47/00G01N33/18G01V3/18
    • G01N27/4163G01N27/308
    • This invention is concerned with electrochemical methods of analysing a fluid for an analyte. It utilises a sensor comprising electrodes and a mediator compound capable of undergoing a cycle of oxidation and reduction in response to varying potential applied to the electrodes, where the compound is also able to undergo a portion of the cycle through chemical reaction with the analyte. As is already known, the sensor is used in a method in which the sensor and the fluid are brought into contact sufficiently for the analyte to react chemically with the mediator, and in a voltammetry procedure, potential is applied to the electrodes while observing current flow with sufficient time for reaction between the mediator compound and the analyte, for thereby observing the concentration of the analyte. The novel characteristic of this invention is a step of calibrating the sensor by applying a rapidly changing potential to the electrodes and observing current flow, the change of this potential and observation of current being sufficiently fast to allow and observe electrochemical oxidation and reduction of the mediator taking place independently of the concentration of analyte, thereby observing the concentration of the mediator compound. The rapid change of potential maybe provided by pulse voltammetry or square wave voltammetry.
    • 本发明涉及分析流体用于分析物的电化学方法。 它利用包括电极和介体化合物的传感器,该介体能够响应于施加到电极上的变化的电势而发生氧化和还原循环,其中化合物还能够通过与分析物发生化学反应而经历循环的一部分。 如已知的那样,传感器用于使传感器和流体充分接触以使分析物与介体化学反应的方法中,并且在伏安测量过程中,在观察电流的同时将电位施加到电极上 具有足够的时间用于介体化合物和分析物之间的反应,从而观察分析物的浓度。 本发明的新颖特征是通过向电极施加快速变化的电势并观察电流,校准传感器的步骤,该电势的变化和电流的观察足够快以允许和观察电化学氧化和介体的还原 与分析物浓度无关地进行,从而观察介体化合物的浓度。 可能由脉冲伏安法或方波伏安法提供电位的快速变化。