公开(公告)号：US20040217763A1

公开(公告)日：2004-11-04

申请号：US10427899

申请日：2003-05-01

申请人： PathFinder Energy Services, Inc.

发明人： Robert A. Moore

IPC分类号： G01V003/10 ,  G01V003/18

CPC分类号： G01V3/30

摘要： A loop antenna useful, for example, in investigation of earth formations. Embodiments of the invention provide a loop antenna circuit comprising a loop antenna disposed to generate, in response to an electromagnetic wave, a pick-up signal on an output node. Loop antenna circuit further includes a tuning network coupled to the loop antenna. The tuning network is disposed to provide simultaneous tuning at a plurality of interrogation frequencies. Further embodiments include a preamplifier circuit coupled to the loop antenna. The preamplifier circuit is disposed to receive the pick-up signal on an input node and provide a high impedance load to the loop antenna for a first of the plurality of interrogation frequencies to reduce the secondary radiation from the loop antenna to below a predetermined value at the said first interrogation frequency.

摘要翻译： 一个环形天线可用于例如研究地层。 本发明的实施例提供了一种环形天线电路，其包括设置成响应于电磁波在输出节点上产生拾取信号的环形天线。 环路天线电路还包括耦合到环形天线的调谐网络。 调谐网络被设置成提供多个询问频率的同时调谐。 另外的实施例包括耦合到环形天线的前置放大器电路。 前置放大器电路设置成在输入节点上接收拾取信号，并且为多个询问频率中的第一个询问频率向环形天线提供高阻抗负载，以将来自环形天线的二次辐射减小到低于预定值的预定值 所述第一询问频率。

公开(公告)号：US20040196044A1

公开(公告)日：2004-10-07

申请号：US10828391

申请日：2004-04-19

发明人： Guenter W. Brune ,  Albert W. Chau ,  John E. Mercer

IPC分类号： G01V003/10

CPC分类号： E21B47/0905 ,  E21B47/024 ,  G01C9/02 ,  G01V3/08 ,  G01V3/15 ,  G01V3/165 ,  G01V3/28

摘要： A portable locator and method for establishing the location of the cable line in a region which includes at least one generally straight electrically conductive cable line extending across the region from which cable line a locating signal includes a first arrangement for measuring a local flux intensity of the locating signal at a first above ground point within the region with the portable locator in a particular orientation at the first above ground point. A second arrangement uses the local flux intensity to establish a cable line angular orientation which limits the possible directions to the cable line relative to the particular orientation of the portable locator at the above ground point. A third arrangement uses the measured local flux intensity to establish an actual direction of the cable line that is selected from the possible directions based on certain characteristics of the locating signal.

摘要翻译： 一种便携式定位器和方法，用于在包括至少一个大致直的导电电缆线的区域中建立电缆线的位置，该电缆线延伸穿过电缆线的区域，定位信号包括用于测量电缆线的局部通量强度的第一布置 将定位信号放置在该区域内的第一个地上点，便携式定位器在第一个地面上处于特定取向。 第二种方案使用局部通量强度来建立电缆线角度取向，其限制相对于便携式定位器在上述地面点的特定取向的电缆线的可能方向。 第三布置使用测量的局部通量强度来建立从基于定位信号的某些特性的可能方向中选择的电缆线的实际方向。

公开(公告)号：US20040164740A1

公开(公告)日：2004-08-26

申请号：US10792559

申请日：2004-03-03

发明人： Morio Mizuno

IPC分类号： G01V003/10

CPC分类号： E21B7/046 ,  E21B47/02224 ,  G01V3/081 ,  G01V3/15

摘要： A system and method for locating a horizontal bore below a ground surface includes a transmitting source configured to radiate from the bore a dipole magnetic field aligned with the bore. A receiver is located remote from the transmitting source and has a first coil and a second coil. Each coil defines an axis, wherein the axes of the first coil and the second coil are orthogonal to each other. A measurement device is in communication with the coils and configured to measure the phase of signals induced on the coils by the magnetic field when the axis of the first coil is horizontally perpendicular to the axis of the magnetic field and the axis of the second coil is vertically perpendicular to the axis of the magnetic field. The measurement device is also configured to determine the lateral position of the transmitting source relative to the coils responsively to the phase of the signals on the first coil and the second coil.

摘要翻译： 用于在地表面下方定位水平孔的系统和方法包括被配置为从所述孔辐射与所述孔对准的偶极磁场的发射源。 接收器位于远离发射源的位置并且具有第一线圈和第二线圈。 每个线圈限定一个轴线，其中第一线圈和第二线圈的轴线彼此正交。 测量装置与线圈连通，并且被配置为当第一线圈的轴线垂直于磁场的轴线并且第二线圈的轴线是第二线圈的轴线时，通过磁场来测量在线圈上感应的信号的相位 垂直于磁场的轴线垂直。 测量装置还被配置为响应于第一线圈和第二线圈上的信号的相位确定发射源相对于线圈的横向位置。

公开(公告)号：US20040056663A1

公开(公告)日：2004-03-25

申请号：US10254752

申请日：2002-09-25

发明人： Paul L. Sinclair ,  Joseph K. Clontz

IPC分类号： G01V003/10 ,  G01V003/28

CPC分类号： G01V3/32

摘要： A method and apparatus for a downhole antenna comprising a housing having an outer surface and a longitudinally bored inner cavity, the outer surface having a first slot and a corresponding second slot extending from the outer surface to the longitudinally bored inner cavity; a first removable downhole antenna segment disposed in the first slot in a first transverse cross section of the housing, the first removable downhole antenna segment comprising at least one coil to inductively couple a signal from the longitudinally bored inner cavity to the earth formation. A second removable downhole antenna segment, interchangeable with the first removable downhole antenna segment, disposed in the corresponding second slot, the second slot in a second transverse cross section of the housing, the second removable downhole antenna segment comprising at least one coil to inductively couple a signal from the earth formation to the longitudinally bored inner cavity.

摘要翻译： 一种用于井下天线的方法和装置，包括具有外表面和纵向钻孔的内腔的壳体，所述外表面具有第一槽和从外表面延伸到纵向钻孔内腔的对应的第二槽; 第一可拆卸的井下天线段，其设置在壳体的第一横截面中的第一槽中，第一可拆卸的井下天线段包括至少一个线圈，以将来自纵向无孔内腔的信号感应地耦合到地层。 第二可移动井下天线段，与第一可移动井下天线段可互换，设置在相应的第二槽中，第二槽位于壳体的第二横截面中，第二可拆卸井下天线段包括至少一个线圈以感应耦合 从地层到纵向无孔内腔的信号。

公开(公告)号：US20040046561A1

公开(公告)日：2004-03-11

申请号：US10610943

申请日：2003-07-01

申请人： Baker Hughes Incorporated

发明人： Gregory Itskovich ,  Alexander Bespalov ,  Borislav J. Tchakarov

IPC分类号： G01V003/18 ,  G01V003/10

CPC分类号： G01V3/28

摘要： The present invention provides a method and apparatus for performing resistivity measurements for the purpose of geo-steering with 180-degree azimuth resolution. All the measurements represent a complementary set of data acquired in two operational modes. The directional mode providing sensitivity of the received signals to the azimuth characteristics of the formation. The deep mode provides a large depth of investigation for resistivity determination and bed boundary detection. The directional mode can be implemented using one receiving coil placed in between quadruple type transmitter. The deep mode represents either array induction measurements or multiple propagation resisitivity (MPR) measurements that provide high depth of investigation for resistivity determination and bed boundary detection.

摘要翻译： 本发明提供了用于以180度方位分辨率进行地理转向的电阻率测量的方法和装置。 所有测量值代表在两种操作模式下获取的一组互补数据。 方向模式提供接收信号对地层方位角特性的灵敏度。 深度模式为电阻率测定和床边界检测提供了大量的调查深度。 方向模式可以使用放置在四联型发射机之间的一个接收线圈来实现。 深度模式表示阵列感应测量或多传播电阻（MPR）测量，为电阻率测定和床边界检测提供了高深度的调查。

公开(公告)号：US20030146752A1

公开(公告)日：2003-08-07

申请号：US10068346

申请日：2002-02-05

发明人： Stanley C. Gianzero ,  Li Gao

IPC分类号： G01V003/10 ,  G01V003/18 ,  G06F019/00

CPC分类号： G01V3/28

摘要： There is disclosed herein a method of enhancing the vertical resolution of an induction tool, in a manner that may advantageously also reduce undesirable borehole and nullnegative resistivitynull effects. In one embodiment, the method comprises: a) obtaining a vertical magnetic dipole (VMD) response signal from a transmitter-receiver array of antenna elements having magnetic dipoles oriented parallel to a tool axis; b) obtaining a horizontal magnetic dipole (HMD) response signal from a transmitter-receiver array of elements having magnetic dipoles oriented perpendicular to the tool axis; and c) combining the VMD and HMD response signals to obtain a combination response signal. When the relative weights of the VMD and HMD response signals are set as described herein, the combination response signal (and any log calculated therefrom) has a narrow, substantially rectilinear, vertical measurement profile. Further, the combination response signal is relatively insensitive to borehole effects.

摘要翻译： 这里公开了以有利地还可以减少不期望的钻孔和“负电阻率”效应的方式增强感应工具的垂直分辨率的方法。 在一个实施例中，该方法包括：a）从具有平行于刀具轴线定向的磁偶极子的天线元件的发射器 - 接收器阵列获得垂直磁偶极子（VMD）响应信号; b）从具有垂直于工具轴线定向的磁偶极子的元件的发射器 - 接收器阵列获得水平磁偶极子（HMD）响应信号; 以及c）组合VMD和HMD响应信号以获得组合响应信号。 当如本文所述设置VMD和HMD响应信号的相对权重时，组合响应信号（以及从其计算的任何对数）具有窄的基本直线的垂直测量轮廓。 此外，组合响应信号对钻孔效应相对不敏感。

公开(公告)号：US20030137302A1

公开(公告)日：2003-07-24

申请号：US10355613

申请日：2003-01-30

申请人： SCHLUMBERGER TECHNOLOGY CORPORATION

发明人： Brian Clark ,  John Hunka ,  Mark T. Frey ,  David L. Smith ,  Dhananjay Ramaswamy ,  Anthony Collins ,  Stephen Bonner

IPC分类号： G01V003/10 ,  G01V003/18 ,  G01V003/00

CPC分类号： G01V3/30 ,  E21B47/011 ,  E21B47/122 ,  G01V11/002 ,  Y10T137/0396 ,  Y10T137/0452

摘要： Systems and methods for downhole communication and measurement utilizing an improved metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a run-in tool. The tubular including slotted stations to provide through-tubular signal transmission and/or reception. Hydraulic isolation between the interior and exterior of the tubular is provided by pressure barrier means at the slotted stations. Sensors and/or sources are mounted on the run-in tool, which is adapted for transmission through a drill string to engage within the tubular in alignment with the slotted stations. A run-in tool configuration includes a modulator for real-time wireless communication with the surface and/or remote downhole tools. A tubular and run-in tool configuration also includes inductive couplers for wireless signal data transfer. A method for measuring a formation characteristic utilizing a run-in tool adapted with an interchangeable end segment for multi-mode downhole transport. Methods for sealing an opening on the surface of a tubular having an elongated body with tubular walls and a central bore.

摘要翻译： 用于井下通信和测量的系统和方法利用改进的金属管状物，其具有带有管状壁的细长主体和适于接纳磨合工具的中心孔。 管状件包括开槽台，以提供贯穿管状的信号传输和/或接收。 在管状内部和外部之间的液压隔离由开槽站处的压力阻挡装置提供。 传感器和/或源安装在导入工具上，该工具适用于通过钻柱传输，以与管槽相配合以与开槽工位对准。 一个入门工具配置包括一个用于与表面和/或远程井下工具进行实时无线通信的调制器。 管状和经入工具配置还包括用于无线信号数据传输的电感耦合器。 一种利用适用于多模式井下输送的可互换端部段的换入工具测量地层特性的方法。 用于密封具有管状壁和中心孔的具有细长主体的管状物的表面上的开口的方法。

公开(公告)号：US20030057950A1

公开(公告)日：2003-03-27

申请号：US09927818

申请日：2001-08-10

发明人： Li Gao ,  Luis Sanmartin ,  Stanley C. Gianzero

IPC分类号： G01V003/10

CPC分类号： G01V3/28

摘要： A method is disclosed for the determination of the dip angle of anisotropic earth formations surrounding a wellbore. Electromagnetic couplings among a plural of triad transmitters and triad receivers are measured. Each triad transmitter/receiver consists of coil windings in three mutually orthogonal axes. The transmitter coils and receiver coils are oriented such that mutually symmetrical transmitter pairs or mutually symmetrical receiver pairs are equidistant from a centrally located receiver or transmitter, respectively. The measured signals from the created couplings are used to generate initial separate estimates of the dip angle of the formation. The two discrete determinations of dip angle are then averaged to arrive at a more accurate estimate that to approaches the true dip angle in the formation.

摘要翻译： 公开了用于确定围绕井眼的各向异性地层的倾角的方法。 测量多个三端发射器和三电平接收器之间的电磁耦合。 每个三元组发送器/接收器由三个相互正交的轴线圈绕组组成。 发射器线圈和接收器线圈被定向成使得相互对称的发射器对或相互对称的接收器对分别与位于中心的接收器或发射器等距。 来自所产生的联轴器的测量信号用于产生地层倾角的初始分离估计。 然后将倾角的两个离散测量值进行平均，以获得接近地层中真正倾角的更准确的估计。

公开(公告)号：US20030025503A1

公开(公告)日：2003-02-06

申请号：US09922393

申请日：2001-08-03

发明人： Otto Fanini ,  Stanislav W. Forgang

IPC分类号： G01V003/10

CPC分类号： G01V3/28

摘要： An improved induction tool for formation resistivity evaluations. The tool provides electromagnetic transmitters and sensors suitable for transmitting and receiving magnetic fields in radial directions that are orthogonal to the tool's longitudinal axis with minimal susceptibility to errors associated with parasitic eddy currents induced in the metal components surrounding the transmitter and receiver coils. The present invention provides increased effective tool surface impedance by increasing self-inductance of the paths in which induced eddy currents flow on the surface of the multi-component induction instruments. The tool enables downhole tool designers to build more effective and better-protected radial induction arrays for existing and future downhole instruments operating in the frequency and/or time domains. In this case the array measurement results contain information primarily about the formation's vertical resistivity. The tool makes it possible to combine radial arrays with coaxial arrays that conventionally measure horizontal formation resistivity. This combination enables obtaining a full resistivity tensor to evaluate formation resistivity anisotropy. The tool provides a composite non-conductive housing to reduce or even avoid the effects of parasitic eddy currents flowing on the tool surface. The tool provides a non-magnetic housing that is conductive which reduces the effects of conductive materials near coils and, primarily, the receiver. The tool provides a non-conductive coating is placed over the housing to prevent high frequency eddy currents from leaking from the housing in the conductive mud of the adjacent wellbore and returning to the housing.

摘要翻译： 改进的地层电阻率评估感应工具。 该工具提供电磁发射器和传感器，适用于在与工具的纵向轴线正交的径向方向上发射和接收磁场，对与发射器和接收器线圈周围的金属部件中感应的寄生涡流有关的误差的影响最小。 本发明通过增加感应涡流在多部件感应仪器的表面上流动的路径的自感来提供增加的有效工具表面阻抗。 该工具使井下工具设计人员能够为在频率和/或时域工作的现有和未来的井下仪器构建更有效和更好保护的径向感应阵列。 在这种情况下，阵列测量结果包含主要关于地层垂直电阻率的信息。 该工具使得可以将径向阵列与常规测量水平地层电阻率的同轴阵列组合。 这种组合使得能够获得全电阻率张量以评估地层电阻率各向异性。 该工具提供复合非导电外壳，以减少或甚至避免流入工具表面的寄生涡流的影响。 该工具提供导电的非磁性壳体，其减少线圈附近的导电材料的影响，主要是接收器的影响。 该工具提供非导电涂层放置在壳体上以防止高频涡流从相邻井眼的导电泥浆中的壳体泄漏并返回到壳体。

公开(公告)号：US20020130663A1

公开(公告)日：2002-09-19

申请号：US09810426

申请日：2001-03-19

发明人： Arthur F. Kuckes ,  Rahn Pitzer ,  Herbert J. Susmann

IPC分类号： G01V003/08 ,  G01V003/10

CPC分类号： G01V3/30 ,  E21B47/02216 ,  E21B47/024

摘要： An apparatus and method for surveying the path of a borehole includes two single-axis field sensors located at a radius centered at a fixed location. Guide wires are located along the earth's surface above the prescribed borehole path and the known electromagnetic field produced by current in the guide wires are detected by the sensors. Values of X and Y vectors at multiple locations on a spherical surface at the radial distance of the sensors are calculated and compared with measured values to define the location of the sensors on the spherical surface to permit the lateral spacing between the sensors and the desired borehole path to be determined.