公开(公告)号：US08736264B2

公开(公告)日：2014-05-27

申请号：US13356381

申请日：2012-01-23

Applicant: David O. Walsh ,  Peter Turner

Inventor： David O. Walsh ,  Peter Turner

IPC: G01V3/32 ,  G01N24/08 ,  G01R33/36 ,  G01R33/341 ,  G01R33/38

CPC classification number: G01N24/08 ,  G01N24/081 ,  G01R33/341 ,  G01R33/3628 ,  G01R33/3808 ,  G01V3/32

Abstract: Technologies including NMR logging apparatus and methods are disclosed. Example NMR logging apparatus may include surface instrumentation and one or more downhole probes configured to fit within an earth borehole. The surface instrumentation may comprise a power amplifier, which may be coupled to the downhole probes via one or more transmission lines, and a controller configured to cause the power amplifier to generate a NMR activating pulse or sequence of pulses. Impedance matching means may be configured to match an output impedance of the power amplifier through a transmission line to a load impedance of a downhole probe. Methods may include deploying the various elements of disclosed NMR logging apparatus and using the apparatus to perform NMR measurements.

Abstract translation: 公开了包括NMR测井装置和方法在内的技术。 实例NMR测井装置可以包括表面仪表和一个或多个配置成装在地球钻孔内的井下探针。 表面仪器可以包括功率放大器，其可以经由一个或多个传输线耦合到井下探针，以及被配置为使功率放大器产生NMR激活脉冲或脉冲序列的控制器。 阻抗匹配装置可以被配置为通过传输线将功率放大器的输出阻抗匹配到井下探针的负载阻抗。 方法可以包括部署所公开的NMR测井装置的各种元件，并使用该装置进行NMR测量。

公开(公告)号：US08451004B2

公开(公告)日：2013-05-28

申请号：US13090436

申请日：2011-04-20

Applicant: David O. Walsh

Inventor： David O. Walsh

IPC: G01V3/00

CPC classification number: A61B5/055 ,  A61B5/7203 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/365 ,  G01R33/3657 ,  G01R33/445

Abstract: A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.

Abstract translation: 多核磁共振检测和成像装置允许在低工作频率下有效地执行多核磁共振检测和成像。 该装置包括交流电压发生器，发射开关电路，线圈开关网络，两个或更多个检测线圈的阵列，一组具有用于每个检测线圈的一个开关电路的接收开关电路，以及一组具有输入的前置放大器电路 阻抗基本上大于每个相应检测线圈在预期工作频率下的阻抗。 交流发电机产生交流电流波形，其在发射模式期间通过一个或多个检测线圈路由，同时前置放大器电路与检测线圈隔离。 在接收模式期间，交流发电机与检测线圈隔离，以防止发射机的噪声降低接收信号的质量。

公开(公告)号：US09348054B2

公开(公告)日：2016-05-24

申请号：US13541706

申请日：2012-07-04

Applicant: David O. Walsh ,  Elliot D. Grunewald

Inventor： David O. Walsh ,  Elliot D. Grunewald

IPC: G01V3/00 ,  G01V3/14 ,  G01R33/563 ,  G01V3/32

CPC classification number: G01V3/14 ,  G01R33/563 ,  G01V3/32

Abstract: Nuclear Magnetic Resonance (NMR) measurement apparatus, NMR sensors, NMR measurement methods are disclosed to determine NMR properties of engineered flow management structures, and to estimate engineering properties using determined NMR properties. Example engineered flow management structures include engineered water storage, water management, water production, water sampling structures, and/or structures that serve as conduits or barriers to water movement. Technologies disclosed herein are also applicable to measuring properties relating to other fluid and/or gas flow in engineered flow management structures.

Abstract translation: 公开核磁共振（NMR）测量装置，NMR传感器，NMR测量方法以确定工程流程管理结构的NMR性质，并使用确定的NMR性质估计工程性质。 示例性的工程流程管理结构包括设计水储存，水管理，水生产，水采样结构和/或用作水运动的导管或障碍物的结构。 本文公开的技术也适用于在工程流程管理结构中测量与其它流体和/或气流有关的性质。

公开(公告)号：US20090276169A1

公开(公告)日：2009-11-05

申请号：US12418329

申请日：2009-04-03

Applicant: David O. Walsh ,  William F. Avrin

Inventor： David O. Walsh ,  William F. Avrin

IPC: G01R33/00 ,  G06F17/16 ,  G06F19/00

CPC classification number: G01R33/10

Abstract: Methods and systems for a universally applicable, linear, signal processing framework for optimal detection, localization, and feature extraction of dipolar magnetic and electromagnetic (EM) targets. Such methods and systems provide the ability to, for example, simultaneously and optimally solve the problems of detection, localization and estimation of the dipole vector or target response matrix; be applicable to different types of magnetic or EMI sensor system; and be applicable to arbitrary combinations of sensor locations and orientations, and arbitrary spatial sampling. Such functionality is provided, in various aspects of the disclosure, with a quadrature matched filter algorithm for detecting and imaging magnetic dipoles to the more complex realm of single- and multi-channel EMI sensors.

Abstract translation: 用于极地电磁和电磁（EM）目标的最佳检测，定位和特征提取的普遍适用的线性信号处理框架的方法和系统。 这样的方法和系统提供了例如同时并且最佳地解决偶极子向量或目标响应矩阵的检测，定位和估计的问题的能力; 适用于不同类型的磁性或EMI传感器系统; 并适用于传感器位置和方向的任意组合，以及任意空间采样。 在本公开的各个方面，提供了一种用于检测和成像磁偶极子到单通道和多通道EMI传感器的更复杂领域的正交匹配滤波器算法的这种功能。

公开(公告)号：US07466128B2

公开(公告)日：2008-12-16

申请号：US11329313

申请日：2006-01-09

Applicant: David O. Walsh

Inventor： David O. Walsh

IPC: G01V3/00

CPC classification number: G01R33/3415 ,  G01R33/44 ,  G01R33/445 ,  G01R33/4831 ,  G01V3/14

Abstract: A multicoil NMR data acquisition apparatus and processing method for performing three-dimensional magnetic resonance imaging in a static magnetic field without the application of controlled static magnetic field gradients. A preferred application relates specifically to the detection and localization of groundwater using the Earth's magnetic field. Multicoil arrays are used in both transmit and receive modes, and coherent data processing algorithms applied to the data to generate three-dimensional NMR spin density estimates. Disclosed are methods for acquiring NMR data using an array of at least two transmit and receive coils, and for processing such multicoil data to estimate the three-dimensional NMR spin density distributions.

Abstract translation: 一种用于在不施加受控静态磁场梯度的情况下在静态磁场中进行三维磁共振成像的多芯NMR数据采集装置和处理方法。 优选的应用具体涉及使用地球磁场的地下水的检测和定位。 Multicoil阵列用于发射和接收模式，并且将相干数据处理算法应用于数据以产生三维NMR自旋密度估计。 公开了使用至少两个发射和接收线圈的阵列获取NMR数据的方法，并且用于处理这样的多芯片数据以估计三维NMR自旋密度分布。

公开(公告)号：US6160398A

公开(公告)日：2000-12-12

申请号：US346809

申请日：1999-07-02

Applicant: David O. Walsh

Inventor： David O. Walsh

IPC: G01R33/3415 ,  G01V3/00

CPC classification number: G01R33/3415

Abstract: A method to model the NMR signal and/or noise functions as stochastic processes. Locally relevant statistics for the signal and/or noise processes are derived directly from the set of individual coil images, in the form of array correlation matrices, by averaging individual coil image cross-products over two or more pixel locations. An optimal complex weight vector is computed on the basis of the estimated signal and noise correlation statistics. The weight vector is applied to coherently combine the individual coil images at a single pixel location, at multiple pixel locations, or over the entire image field of view (FOV).

Abstract translation: 将NMR信号和/或噪声函数建模为随机过程的方法。 信号和/或噪声过程的本地相关统计是通过在两个或多个像素位置上对各个线圈图像交叉乘积进行平均而直接从阵列相关矩阵的形式从单独线圈图像集合导出的。 基于估计的信号和噪声相关统计来计算最佳复权重向量。 应用权重向量在单个像素位置，多个像素位置处或整个图像视场（FOV）上相干组合各个线圈图像。

公开(公告)号：US08816684B2

公开(公告)日：2014-08-26

申请号：US12914138

申请日：2010-10-28

Applicant: David O. Walsh

Inventor： David O. Walsh

IPC: G01V3/10 ,  G01V3/14 ,  G01V3/18 ,  G01V3/28 ,  G01V3/32 ,  G01V3/36 ,  G01N24/08 ,  G01R33/36

CPC classification number: G01V3/32 ,  G01N24/081 ,  G01R33/285 ,  G01R33/341 ,  G01R33/36 ,  G01R33/3664 ,  G01R33/3808 ,  G01R33/5659 ,  G01V3/10 ,  G01V3/14 ,  G01V3/18 ,  G01V3/28 ,  G01V3/36

Abstract: Technologies applicable to noise canceling in-situ NMR detection and imaging are disclosed. An example noise canceling in-situ NMR detection apparatus may comprise one or more of a static magnetic field generator, an alternating magnetic field generator, an in-situ NMR detection device, an auxiliary noise detection device, and a computer.

Abstract translation: 公开了适用于噪声消除原位NMR检测和成像技术。 示例性降噪原位NMR检测装置可以包括静态磁场发生器，交变磁场发生器，原位NMR检测装置，辅助噪声检测装置和计算机中的一个或多个。

公开(公告)号：USRE43264E1

公开(公告)日：2012-03-27

申请号：US12715115

申请日：2010-03-01

Applicant: David O. Walsh

Inventor： David O. Walsh

IPC: G01V3/00 ,  G01R33/20

CPC classification number: G01R33/3415 ,  G01R33/44 ,  G01R33/445 ,  G01R33/4831 ,  G01V3/14

Abstract: A multicoil NMR data acquisition apparatus and processing method for performing three-dimensional magnetic resonance imaging in a static magnetic field without the application of controlled static magnetic field gradients. A preferred application relates specifically to the detection and localization of groundwater using the Earth's magnetic field. Multicoil arrays are used in both transmit and receive modes. and coherent data processing algorithms applied to the data to generate three-dimensional NMR spin density estimates. Disclosed are methods for acquiring NMR data using an array of at least two transmit and receive coils, and for processing such multicoil data to estimate the three-dimensional NMR spin density distributions.

Abstract translation: 一种用于在不施加受控静态磁场梯度的情况下在静态磁场中进行三维磁共振成像的多芯NMR数据采集装置和处理方法。 优选的应用具体涉及使用地球磁场的地下水的检测和定位。 Multicoil阵列用于发送和接收模式。 和相干数据处理算法应用于数据以产生三维NMR自旋密度估计。 公开了使用至少两个发射和接收线圈的阵列获取NMR数据的方法，并且用于处理这样的多芯片数据以估计三维NMR自旋密度分布。

公开(公告)号：US20110095758A1

公开(公告)日：2011-04-28

申请号：US12672503

申请日：2008-11-10

Applicant: David O. Walsh

Inventor： David O. Walsh

IPC: G01R33/44 ,  G01R33/48

CPC classification number: A61B5/055 ,  A61B5/7203 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/365 ,  G01R33/3657 ,  G01R33/445

Abstract: A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.

Abstract translation: 多核磁共振检测和成像装置允许在低工作频率下有效地执行多核磁共振检测和成像。 该装置包括交流电压发生器，发射开关电路，线圈开关网络，两个或更多个检测线圈的阵列，一组具有用于每个检测线圈的一个开关电路的接收开关电路，以及一组具有输入的前置放大器电路 阻抗基本上大于每个相应检测线圈在预期工作频率下的阻抗。 交流发电机产生交流电流波形，其在发射模式期间通过一个或多个检测线圈路由，同时前置放大器电路与检测线圈隔离。 在接收模式期间，交流发电机与检测线圈隔离，以防止发射机的噪声降低接收信号的质量。

公开(公告)号：US09551807B2

公开(公告)日：2017-01-24

申请号：US13874655

申请日：2013-05-01

Applicant: David O. Walsh ,  Elliot D. Grunewald

Inventor： David O. Walsh ,  Elliot D. Grunewald

IPC: G01V3/32

CPC classification number: G01V3/32

Abstract: Technologies applicable to NMR detection of water and hydrocarbons during induced alteration processes are disclosed. NMR measurements may be used to monitor properties of subsurface fluids within a subsurface formation. NMR measurement devices may be deployed proximal to or within a subsurface formation that contains hydrocarbons. Multiple NMR measurements may be performed during an induced alteration process applied to the subsurface formation to determine properties of the subsurface formation or fluid as the induced alteration process progresses. Changes in properties of the subsurface formation or fluid may be determined and may be used to determine efficacy of, optimize, or otherwise modify the induced alteration process.

Abstract translation: 公开了在诱导改变过程中适用于水和烃的NMR检测的技术。 NMR测量可用于监测地下地层内地下流体的性质。 NMR测量装置可以部署在含有烃的地下地层附近或内部。 可以在施加到地下地层的诱导变化过程中进行多次NMR测量，以确定诱导的变化过程进行时地下地层或流体的性质。 可以确定地下构造或流体的性质的变化，并且可以用于确定诱导的改变过程的功效，优化或以其它方式改变。