公开(公告)号：US07138897B2

公开(公告)日：2006-11-21

申请号：US10711309

申请日：2004-09-09

申请人： Gerald Minerbo ,  Sofia Davydycheva ,  Hanming Wang ,  Dean M. Homan

发明人： Gerald Minerbo ,  Sofia Davydycheva ,  Hanming Wang ,  Dean M. Homan

IPC分类号： H01F27/02

CPC分类号： G01V3/28

摘要： An induction tool includes a conductive mandrel; at least one array including a transmitter, a bucking coil, and a receiver disposed in an insulating tool body surrounding the conductive mandrel; and an electrode disposed on the insulating tool body at a selected location between the bucking coil and the receiver, wherein the selected location is spaced from the transmitter at a distance corresponding approximately to the harmonic mean of the distance between the transmitter and the bucking coil and the distance between the transmitter and the receiver, and wherein the electrode includes a contact forming a conductive path to the conductive mandrel. Additional electrodes may be disposed above and below each transmitter and receiver coil to reduce sensitivity to eccentricity of the tool in the borehole.

摘要翻译： 感应工具包括导电心轴; 至少一个阵列，包括发射器，降压线圈和设置在围绕导电心轴的绝缘工具主体中的接收器; 以及电极，其设置在所述绝缘工具主体之间的所述抵消线圈和所述接收器之间的选定位置处，其中所述选定位置与所述发射器间隔开大致相当于所述发射器和所述抗弯线圈之间的距离的谐波平均值的距离;以及 发射器和接收器之间的距离，并且其中电极包括形成到导电心轴的导电路径的触点。 附加的电极可以设置在每个发射器和接收器线圈之上和之下，以降低钻孔中工具的偏心度的灵敏度。

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。

公开(公告)号：US06380744B2

公开(公告)日：2002-04-30

申请号：US09932249

申请日：2001-08-17

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

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

IPC分类号： G01V330

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.

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。