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    • 2. 发明申请
    • MULTIPLE DEPTHS OF INVESTIGATION USING TWO PAIRS OF TOROID TRANSMITTERS
    • 使用两对三极管发射器的多个调查深度
    • WO2011115784A2
    • 2011-09-22
    • PCT/US2011027569
    • 2011-03-08
    • BAKER HUGHES INCMAURER HANS-MARTINBEARD DAVID R
    • MAURER HANS-MARTINBEARD DAVID R
    • G01V3/20E21B47/00G01V3/02G01V3/34
    • G01V3/24
    • An apparatus and method for estimating a parameter of interest of an earth formation, particularly relating to borehole logging methods and apparatuses for estimating electrical resistivity properties at multiple depths of investigation. The apparatus may include two or more transmitters for introducing electrical current to the earth formation. The apparatus may include a controller configured to deliver an electrical signal to the two or more transmitters either simultaneously or sequentially. The controller may deliver an electrical signal to two or more transmitters at the same frequency for estimating depth of investigation. The apparatus may include one or more receivers responsive to electric signals from the earth formation at one or more frequencies to provide data from one or more depths of investigation. The method may include steps for using the apparatus to obtain data that may be used to estimate the parameter of interest.
    • 一种用于估计地层的感兴趣参数的装置和方法,特别是涉及用于估计多个调查深度的电阻率性质的钻孔测井方法和装置。 该装置可以包括用于将电流引入地层的两个或更多个发射器。 该装置可以包括被配置为将电信号同时或顺序地传送到两个或更多个发射器的控制器。 控制器可以以相同的频率向两个或多个发射机传送电信号,以估计调查深度。 该装置可以包括一个或多个接收器,其以一个或多个频率响应于来自地球地层的电信号,以从一个或多个调查深度提供数据。 该方法可以包括使用该装置获得可用于估计感兴趣的参数的数据的步骤。
    • 10. 发明申请
    • ELECTRICAL IMAGER OPERATING IN OIL-BASED MUD AND LOW RESISTIVE FORMATION
    • 基于油基陶瓷和低电阻形成的电子成像仪
    • WO2012096953A3
    • 2012-11-15
    • PCT/US2012020771
    • 2012-01-10
    • BAKER HUGHES INCITSKOVICH GREGORY BBEARD DAVID RLE FEI
    • ITSKOVICH GREGORY BBEARD DAVID RLE FEI
    • G01V3/18G01N27/04G01N33/22G01N33/24
    • G01V3/20
    • This disclosure relates to apparatuses and methods for reducing current leakage between a measure electrode and a logging tool body during borehole investigations in an earth formation involving electric current and non-conductive drilling fluid. The apparatus may include one or more transmitters disposed on a pad body, configured to inject an electric current into the earth formation, and coupled to the mandrel and one or more measure electrodes. The measure electrodes may be configured to receive current from the formation and coupled to a back plate of the pad body. The apparatus may be configured to maintain a selected ratio between pad body to logging tool body impedance and transmitters to logging tool body impedance sufficient to reduce current leakage between the earth formation and the logging tool body. The transmitter/mandrel and measure electrode/back plate may be electrically isolated from one another. The method may include using the apparatus.
    • 本公开涉及用于在包括电流和非导电钻井液的地层中的井眼研究期间减小测量电极和测井工具主体之间的电流泄漏的装置和方法。 设备可以包括设置在垫体上的一个或多个发射器,其被配置为将电流注入到地层中,并且耦合到心轴和一个或多个测量电极。 测量电极可以被配置为从地层接收电流并且耦合到衬垫本体的背板。 该装置可以被配置为保持衬垫主体与测井工具主体阻抗之间的选定比率,并且将发射器保持在足以减小地球形成和测井工具主体之间的电流泄漏的工具体阻抗。 发射器/心轴和测量电极/背板可以彼此电隔离。 该方法可以包括使用该装置。