公开(公告)号：US06710601B2

公开(公告)日：2004-03-23

申请号：US10367475

申请日：2003-02-14

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

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

IPC分类号： G01V318

CPC分类号： G01V3/28

摘要： Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique. An embodiment of the instrument includes an antenna disposed between a pair of electrically coupled electrodes. The antenna is disposed on the instrument such that it comprises a tilted or transverse magnetic dipole. Another embodiment of the instrument includes a non-conductive housing with a conductive segment disposed thereon. An antenna is disposed on the instrument about the conductive segment. Another embodiment includes an antenna disposed between two pairs of electrodes with a device to measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. Yet another instrument includes an antenna disposed between a first pair of electrodes and a device to measure a voltage at the elecrodes when electromagnetic energy is transmitted within the borehole. This embodiment also includes a device to energize a second electrode pair in response to the voltage measured at the first electrode pair.

摘要翻译： 公开了用于在地下测量过程中沿着地下钻孔感应的不期望的轴向电流的发射机和/或接收机天线的最小化或消除的方法和装置，所述发射机和/或接收机天线是基本上时变的磁偶极，其偶极矩与轴成一定角度 的钻孔。 一些天线设置在具有非导电支撑构件的仪器上的钻孔内。 一种仪器包括具有适用于感应频率的天线的导电全金属体。 适用于受控电流流动的天线屏蔽还配有全金属仪器。 方法包括提供沿着仪器主体的电流的替代路径。 另一种方法包括发射受控电流以对抗不需要的电流。 另一种方法使用叠加技术来纠正当前的效果。 仪器的一个实施例包括设置在一对电耦合电极之间的天线。 天线设置在仪器上，使得其包括倾斜或横向磁偶极子。 仪器的另一实施例包括其上设置有导电段的非导电壳体。 天线设置在仪器周围导电段。 另一个实施例包括设置在两对电极之间的天线，当电磁能量在钻孔内传输时，该天线具有用于测量电极处的电压的装置。 另一种仪器包括设置在第一对电极之间的天线和当在井眼内传输电磁能量时测量电极处的电压的装置。 该实施例还包括响应于在第一电极对测量的电压而激励第二电极对的装置。

公开(公告)号：US06693430B2

公开(公告)日：2004-02-17

申请号：US10064853

申请日：2002-08-23

申请人： Richard A. Rosthal ,  Jan Wouter Smits

发明人： Richard A. Rosthal ,  Jan Wouter Smits

IPC分类号： G01V302

CPC分类号： G01V3/28

摘要： Methods and apparatus for making subsurface measurements with reduced or eliminated borehole effects. Antenna and electrode configurations address the undesired axial electric currents that are induced along the borehole when antennas with tilted or transverse axes are used to make electromagnetic measurements. Current and measure electrodes are used in combination with antennas to limit the flow of undesired axial borehole currents. Embodiments use passive, active, or semi-active electrodes to limit the undesired current flow.

摘要翻译： 用于减少或消除井眼效应进行地下测量的方法和装置。 天线和电极配置解决了当具有倾斜或横向轴线的天线用于进行电磁测量时沿井眼感应的不期望的轴向电流。 电流和测量电极与天线组合使用以限制不期望的轴向井眼电流的流动。 实施例使用无源，有源或半有源电极来限制不期望的电流。

公开(公告)号：US06624634B2

公开(公告)日：2003-09-23

申请号：US10367398

申请日：2003-02-14

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

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

IPC分类号： G01V302

CPC分类号： G01V3/28

摘要： Methods and apparatus are disclosed for minimizing or eliminating an undesired axial electric current induced along a subsurface borehole in the process of subsurface measurements with transmitter and/or receiver antennas which are substantially time varying magnetic dipoles with their dipole moments aligned at an angle to the axis of the borehole. Some antennas are disposed within the borehole on instruments having a non-conductive support member. One instrument includes a conductive all-metal body with an antenna adapted for induction frequencies. Antenna shields adapted for controlled current flow are also provided with an all-metal instrument. Methods include providing an alternate path for the current along the instrument body. Another method includes emitting a controlled current to counter the undesired current. Another method corrects for the effect of the current using a superposition technique. An embodiment of the instrument includes an antenna disposed between a pair of electrically coupled electrodes. The antenna is disposed on the instrument such that it comprises a tilted or transverse magnetic dipole. Another embodiment of the instrument includes a non-conductive housing with a conductive segment disposed thereon. An antenna is disposed on the instrument about the conductive segment. Another embodiment includes an antenna disposed between two pairs of electrodes with a device measure a voltage at the electrodes when electromagnetic energy is transmitted within the borehole. Yet another instrument includes an antenna disposed between a first pair of electrodes and a device to measure a voltage at the elecrodes when electromagnetic energy is transmitted within the borehole. This embodiment also includes a device to energize a second electrode pair in response to the voltage measured at the first electrode pair.

摘要翻译： 公开了用于在地下测量过程中沿着地下钻孔感应的不期望的轴向电流的发射机和/或接收机天线的最小化或消除的方法和装置，所述发射机和/或接收机天线是基本上时变的磁偶极，其偶极矩与轴成一定角度 的钻孔。 一些天线设置在具有非导电支撑构件的仪器上的钻孔内。 一种仪器包括具有适用于感应频率的天线的导电全金属体。 适用于受控电流流动的天线屏蔽还配有全金属仪器。 方法包括提供沿着仪器主体的电流的替代路径。 另一种方法包括发射受控电流以对抗不需要的电流。 另一种方法使用叠加技术来纠正当前的效果。 仪器的实施例包括设置在一对电耦合电极之间的天线。 天线设置在仪器上，使得其包括倾斜或横向磁偶极子。 仪器的另一实施例包括其上设置有导电段的非导电壳体。 天线设置在仪器周围导电段。 另一个实施例包括设置在两对电极之间的天线，当在钻孔内传输电磁能时，器件测量电极处的电压。 另一种仪器包括设置在第一对电极之间的天线和当在井眼内传输电磁能量时测量电极处的电压的装置。 该实施例还包括响应于在第一电极对测量的电压而激励第二电极对的装置。

公开(公告)号：US06557794B2

公开(公告)日：2003-05-06

申请号：US09932251

申请日：2001-08-17

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： B65H3916

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：US5157605A

公开(公告)日：1992-10-20

申请号：US43130

申请日：1987-04-27

申请人： Richard N. Chandler ,  Richard A. Rosthal

发明人： Richard N. Chandler ,  Richard A. Rosthal

IPC分类号： G01V3/28

CPC分类号： G01V3/28

摘要： Induction logging apparatus is disclosed which depends for its operation not only upon its arrangement of coils, but also upon the skin depth of the formation. The skin effect of the formation is used advantageously by operating a simple induction sonde at a plurality of frequencies simultaneously. Improved depth of investigation and improved vertical resolution result from the invention. Simple arrays are disclosed for the induction logging apparatus. A sonde with a single transmitter and a plurality of two-coil receiver arrays are preferred. The apparatus acquires both the in-phase and quadrature components of each receiver array signal at several frequencies. The response function is shaped by using a multi-channel deconvolution filter.