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    Method and apparatus for measuring mud resistivity
    1.
    发明授权
    Method and apparatus for measuring mud resistivity 有权
    测量泥浆电阻率的方法和装置

    公开(公告)号：US07091722B2

    公开(公告)日：2006-08-15

    申请号：US10711657

    申请日：2004-09-29

    申请人： Dean M. Homan ,  Dzevat Omeragic ,  Nicolas Sebline ,  Hanming Wang

    发明人： Dean M. Homan ,  Dzevat Omeragic ,  Nicolas Sebline ,  Hanming Wang

    IPC分类号： G01V3/28 ,  G01V3/08 ,  G01V3/10

    CPC分类号： G01V3/28

    摘要： A sensor for measuring mud resistivity in a borehole includes a transmitter having a magnetic moment in a first direction; and a receiver having a magnetic moment in a second direction, wherein the first direction and the second direction are substantially different, wherein the transmitter and the receiver are disposed in an insulating collar of a downhole tool, and wherein the transmitter is disposed at a selected distance no more than 10 inches from the receiver along a longitudinal axis of the downhole tool.

    摘要翻译： 用于测量钻孔中的泥浆电阻率的传感器包括：具有在第一方向上的磁矩的发射器; 以及具有在第二方向上的磁矩的接收器，其中所述第一方向和所述第二方向基本上不同，其中所述发射器和接收器设置在井下工具的绝缘环中，并且其中所述发射器设置在选定的 沿着井下工具的纵向轴距离接收器不超过10英寸的距离。

    Subsurface electromagnetic measurements using cross-magnetic dipoles
    2.
    发明授权
    Subsurface electromagnetic measurements using cross-magnetic dipoles 失效
    使用交叉磁偶极子的地下电磁测量

    公开(公告)号：US07759943B2

    公开(公告)日：2010-07-20

    申请号：US11752112

    申请日：2007-05-22

    申请人： Dean M. Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

    发明人： Dean M. Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

    IPC分类号： G01V3/30 ,  G01V3/18

    CPC分类号： G01V3/30

    摘要： Sensor assemblies including transmitter and receiver antennas to respectively transmit or receive electromagnetic energy. The sensor assemblies are disposed in downhole tools adapted for subsurface disposal. The receiver is disposed at a distance less than six inches (15 cm) from the transmitter on the sensor body. The sensor transmitter or receiver includes an antenna with its axis tilted with respect to the axis of the downhole tool. A sensor includes a tri-axial system of antennas. Another sensor includes a cross-dipole antenna system.

    摘要翻译： 传感器组件包括用于分别发送或接收电磁能的发射机和接收机天线。 传感器组件设置在适于地下处置的井下工具中。 接收器设置在距离传感器主体上的发射器小于6英寸（15厘米）的距离处。 传感器发射器或接收器包括其轴线相对于井下工具的轴线倾斜的天线。 传感器包括三轴天线系统。 另一传感器包括一个交叉偶极天线系统。

    Subsurface electromagnetic measurements using cross-magnetic dipoles
    3.
    发明授权
    Subsurface electromagnetic measurements using cross-magnetic dipoles 有权
    使用交叉磁偶极子的地下电磁测量

    公开(公告)号：US07239145B2

    公开(公告)日：2007-07-03

    申请号：US10812369

    申请日：2004-03-29

    申请人： Dean M. Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

    发明人： Dean M. Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

    IPC分类号： G01V3/18

    CPC分类号： G01V3/30

    摘要： Sensor assemblies including transmitter and receiver antennas to respectively transmit or receive electromagnetic energy. The sensor assemblies are disposed in downhole tools adapted for subsurface disposal. The receiver is disposed at a distance less than six inches (15 cm) from the transmitter on the sensor body. The sensor transmitter or receiver includes an antenna with its axis tilted with respect to the axis of the downhole tool. A sensor includes a tri-axial system of antennas. Another sensor includes a cross-dipole antenna system.

    摘要翻译： 传感器组件包括用于分别发送或接收电磁能的发射机和接收机天线。 传感器组件设置在适于地下处置的井下工具中。 接收器设置在距离传感器主体上的发射器小于6英寸（15厘米）的距离处。 传感器发射器或接收器包括其轴线相对于井下工具的轴线倾斜的天线。 传感器包括三轴天线系统。 另一传感器包括一个交叉偶极天线系统。

    Subsurface Electromagnetic Measurements using Cross-Magnetic Dipoles
    4.
    发明申请
    Subsurface Electromagnetic Measurements using Cross-Magnetic Dipoles 失效
    使用交叉磁偶极子的地下电磁测量

    公开(公告)号：US20080290873A1

    公开(公告)日：2008-11-27

    申请号：US11752112

    申请日：2007-05-22

    申请人： Dean M. Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

    发明人： Dean M. Homan ,  Dzevat Omeragic ,  Tianhua Zhang ,  Nicolas Sebline

    IPC分类号： G01V3/12

    CPC分类号： G01V3/30

    摘要： Sensor assemblies including transmitter and receiver antennas to respectively transmit or receive electromagnetic energy. The sensor assemblies are disposed in downhole tools adapted for subsurface disposal. The receiver is disposed at a distance less than six inches (15 cm) from the transmitter on the sensor body. The sensor transmitter or receiver includes an antenna with its axis tilted with respect to the axis of the downhole tool. A sensor includes a tri-axial system of antennas. Another sensor includes a cross-dipole antenna system.

    摘要翻译： 传感器组件包括用于分别发送或接收电磁能的发射机和接收机天线。 传感器组件设置在适于地下处置的井下工具中。 接收器设置在距离传感器主体上的发射器小于6英寸（15厘米）的距离处。 传感器发射器或接收器包括其轴线相对于井下工具的轴线倾斜的天线。 传感器包括三轴天线系统。 另一传感器包括一个交叉偶极天线系统。

    Directional resistivity measurement for well placement and formation evaluation
    5.
    发明授权
    Directional resistivity measurement for well placement and formation evaluation 有权
    井位置和地层评估方向电阻率测量

    公开(公告)号：US09134449B2

    公开(公告)日：2015-09-15

    申请号：US13030780

    申请日：2011-02-18

    申请人： Jean Seydoux ,  Dzevat Omeragic ,  Dean M. Homan

    发明人： Jean Seydoux ,  Dzevat Omeragic ,  Dean M. Homan

    IPC分类号： G01V3/00 ,  G01V3/22 ,  G01V3/30 ,  G01V1/52

    CPC分类号： G01V3/22 ,  G01V1/52 ,  G01V3/30

    摘要： The present disclosure relates to a method to determine a formation property of a subsurface formation. A downhole logging tool having two or more antennas, at least two of the antennas having a transversely-sensitive element and an axially-sensitive element is provided. Azimuthally-sensitive measurements are obtained using the antennas of the downhole logging tool. The measurements are fitted to a Fourier series having Fourier coefficients that include channel gains, if any. A DC component, a first harmonic component, and a second harmonic component are determined from the Fourier series, a measurement type is determined using the DC component, the first harmonic component, and/or the second harmonic component, and the formation property of the subsurface formation is determined using the determined measurement type.

    摘要翻译： 本公开涉及确定地下地层的地层特性的方法。 一种具有两个或多个天线的井下测井工具，其中至少两个天线具有横向敏感元件和轴向敏感元件。 使用井下测井工具的天线获得方位角敏感测量。 这些测量值适用于傅立叶级数，其傅立叶系数包括通道增益（如果有的话）。 从傅里叶级数确定DC分量，一次谐波分量和二次谐波分量，使用DC分量，一次谐波分量和/或二次谐波分量来确定测量类型，并且确定 使用确定的测量类型确定地下地层。

    DIRECTIONAL RESISTIVITY MEASUREMENT FOR WELL PLACEMENT AND FORMATION EVALUATION
    7.
    发明申请
    DIRECTIONAL RESISTIVITY MEASUREMENT FOR WELL PLACEMENT AND FORMATION EVALUATION 有权
    方向电阻测量，用于井架和地层评估

    公开(公告)号：US20110238312A1

    公开(公告)日：2011-09-29

    申请号：US13030780

    申请日：2011-02-18

    申请人： Jean Seydoux ,  Dzevat Omeragic ,  Dean M. Homan

    发明人： Jean Seydoux ,  Dzevat Omeragic ,  Dean M. Homan

    IPC分类号： G06F19/00 ,  G01V3/08

    CPC分类号： G01V3/22 ,  G01V1/52 ,  G01V3/30

    摘要： The present disclosure relates to a method to determine a formation property of a subsurface formation. A downhole logging tool having two or more antennas, at least two of the antennas having a transversely-sensitive element and an axially-sensitive element is provided. Azimuthally-sensitive measurements are obtained using the antennas of the downhole logging tool. The measurements are fitted to a Fourier series having Fourier coefficients that include channel gains, if any. A DC component, a first harmonic component, and a second harmonic component are determined from the Fourier series, a measurement type is determined using the DC component, the first harmonic component, and/or the second harmonic component, and the formation property of the subsurface formation is determined using the determined measurement type.

    摘要翻译： 本公开涉及确定地下地层的地层特性的方法。 一种具有两个或多个天线的井下测井工具，其中至少两个天线具有横向敏感元件和轴向敏感元件。 使用井下测井工具的天线获得方位角敏感测量。 这些测量值适用于傅立叶级数，其傅立叶系数包括通道增益（如果有的话）。 从傅里叶级数确定DC分量，一次谐波分量和二次谐波分量，使用DC分量，一次谐波分量和/或二次谐波分量来确定测量类型，并且确定 使用确定的测量类型确定地下地层。

    Shielding method and apparatus for selective attenuation of an electromagnetic energy field component
    10.
    发明授权
    Shielding method and apparatus for selective attenuation of an electromagnetic energy field component 有权
    用于选择性衰减电磁能场分量的屏蔽方法和装置

    公开(公告)号：US06351127B1

    公开(公告)日：2002-02-26

    申请号：US09452660

    申请日：1999-12-01

    申请人： Richard A. Rosthal ,  Dean M. Homan ,  Dzevat Omeragic ,  Stephen D. Bonner ,  Brian Clark ,  Scott S. Chesser ,  Thomas D. Barber

    发明人： Richard A. Rosthal ,  Dean M. Homan ,  Dzevat Omeragic ,  Stephen D. Bonner ,  Brian Clark ,  Scott S. Chesser ,  Thomas D. Barber

    IPC分类号： G01V312

    CPC分类号： G01V3/28

    摘要： A shield apparatus for use in conjunction with a well tool to selectively attenuate one or more electromagnetic energy field components as the components interact with the shield. The shield composed of a flexible strip or conductive body and comprising at least one sloped slot or sloped conductive element therein. The shield being adapted to surround an antenna mounted on a well tool. A method for rotating the axis of the magnetic dipole of a transmitter or receiver coil. A method for winding and shielding an electric coil such that the resultant coil emits or receives selected electromagnetic energy field components.

    摘要翻译： 一种与阱工具结合使用的屏蔽装置，用于当该部件与屏蔽件相互作用时选择性地衰减一个或多个电磁能量场分量。 该屏蔽由柔性条带或导电体构成，并且包括至少一个倾斜的槽或倾斜的导电元件。 屏蔽适于包围安装在井具上的天线。 一种用于旋转发射器或接收器线圈的磁偶极子的轴线的方法。 一种用于缠绕和屏蔽电线圈使得所得线圈发射或接收所选择的电磁能量分量的方法。