公开(公告)号：US08451004B2

公开(公告)日：2013-05-28

申请号：US13090436

申请日：2011-04-20

申请人： David O. Walsh

发明人： David O. Walsh

IPC分类号： G01V3/00

CPC分类号： A61B5/055 ,  A61B5/7203 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/365 ,  G01R33/3657 ,  G01R33/445

摘要： 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.

摘要翻译： 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：US20110109311A1

公开(公告)日：2011-05-12

申请号：US12914138

申请日：2010-10-28

申请人： DAVID O. WALSH

发明人： DAVID O. WALSH

IPC分类号： G01R33/44

CPC分类号： 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

摘要： 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.

摘要翻译： 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：US10113982B2

公开(公告)日：2018-10-30

申请号：US14054361

申请日：2013-10-15

申请人： VISTA CLARA INC.

发明人： David O. Walsh ,  Peter Turner

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

摘要： 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.

公开(公告)号：US09599688B2

公开(公告)日：2017-03-21

申请号：US13750984

申请日：2013-01-25

申请人： VISTA CLARA INC.

发明人： Elliot D. Grunewald ,  David O. Walsh

IPC分类号： G01R33/44 ,  G01R33/32 ,  G01N24/08 ,  G01V3/14 ,  G01R33/341

CPC分类号： G01R33/448 ,  G01N24/081 ,  G01R33/32 ,  G01R33/341 ,  G01R33/445 ,  G01V3/14

摘要： NMR relaxation time estimation methods and corresponding apparatus generate two or more alternating current transmit pulses with arbitrary amplitudes, time delays, and relative phases; apply a surface NMR acquisition scheme in which initial preparatory pulses, the properties of which may be fixed across a set of multiple acquisition sequence, are transmitted at the start of each acquisition sequence and are followed by one or more depth sensitive pulses, the pulse moments of which are varied across the set of multiple acquisition sequences; and apply processing techniques in which recorded NMR response data are used to estimate NMR properties and the relaxation times T1 and T2* as a function of position as well as one-dimensional and two-dimension distributions of T1 versus T2* as a function of subsurface position.

公开(公告)号：US09588068B2

公开(公告)日：2017-03-07

申请号：US14160243

申请日：2014-01-21

申请人： VISTA CLARA INC.

发明人： Elliot D. Grunewald ,  David O. Walsh

IPC分类号： G01V3/00 ,  G01N24/08 ,  G01V3/32

CPC分类号： G01N24/084 ,  G01N24/081 ,  G01V3/32

摘要： Technologies applicable to detection and characterization of subsurface contaminants by NMR and dielectric measurements are disclosed. The disclosed technologies include methods for obtaining and combining data from NMR and dielectric measurements to detect, quantify, and characterize non-native non-aqueous phase liquid (NAPL) contaminants located in geologic materials.

摘要翻译： 公开了通过NMR和介电测量技术检测和表征地下污染物的技术。 所公开的技术包括用于获得和组合来自NMR和介电测量的数据以检测，量化和表征位于地质材料中的非天然非水相液体（NAPL）污染物的方法。

公开(公告)号：US09551807B2

公开(公告)日：2017-01-24

申请号：US13874655

申请日：2013-05-01

申请人： David O. Walsh ,  Elliot D. Grunewald

发明人： David O. Walsh ,  Elliot D. Grunewald

IPC分类号： G01V3/32

CPC分类号： G01V3/32

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20140253119A1

公开(公告)日：2014-09-11

申请号：US14286382

申请日：2014-05-23

申请人： Vista Clara Inc.

发明人： DAVID O. WALSH

IPC分类号： G01R33/46 ,  G01R33/341

CPC分类号： G01R33/341 ,  G01N24/081 ,  G01R33/285 ,  G01R33/36 ,  G01R33/3664 ,  G01R33/3808 ,  G01R33/5659 ,  G01V3/32 ,  G01V3/38

摘要： 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.

摘要翻译： 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：US20140203806A1

公开(公告)日：2014-07-24

申请号：US14160243

申请日：2014-01-21

申请人： VISTA CLARA INC.

发明人： ELLIOT D. GRUNEWALD ,  DAVID O. WALSH

IPC分类号： G01N24/08

CPC分类号： G01N24/084 ,  G01N24/081 ,  G01V3/32

摘要： Technologies applicable to detection and characterization of subsurface contaminants by NMR and dielectric measurements are disclosed. The disclosed technologies include methods for obtaining and combining data from NMR and dielectric measurements to detect, quantify, and characterize non-native non-aqueous phase liquid (NAPL) contaminants located in geologic materials.

摘要翻译： 公开了通过NMR和介电测量技术检测和表征地下污染物的技术。 所公开的技术包括用于获得和组合来自NMR和介电测量的数据以检测，量化和表征位于地质材料中的非天然非水相液体（NAPL）污染物的方法。

公开(公告)号：US20140009148A1

公开(公告)日：2014-01-09

申请号：US13541706

申请日：2012-07-04

申请人： DAVID O. WALSH ,  ELLIOT D. GRUNEWALD

发明人： DAVID O. WALSH ,  ELLIOT D. GRUNEWALD

IPC分类号： G01V3/14

CPC分类号： G01V3/14 ,  G01R33/563 ,  G01V3/32

摘要： 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.

摘要翻译： 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：US08581587B2

公开(公告)日：2013-11-12

申请号：US13104721

申请日：2011-05-10

申请人： David O. Walsh ,  Elliot D. Grunewald

发明人： David O. Walsh ,  Elliot D. Grunewald

IPC分类号： G01V3/00

CPC分类号： G01R33/44 ,  G01N24/081 ,  G01R33/4608

摘要： Technologies applicable to SNMR pulse sequence phase cycling are disclosed, including SNMR acquisition apparatus and methods, SNMR processing apparatus and methods, and combinations thereof. SNMR acquisition may include transmitting two or more SNMR pulse sequences and applying a phase shift to a pulse in at least one of the pulse sequences, according to any of a variety of phase cycling techniques. SNMR processing may include combining SNMR from a plurality of pulse sequences comprising pulses of different phases, so that desired signals are preserved and undesired signals are canceled.

摘要翻译： 公开了适用于SNMR脉冲序列相位循环的技术，包括SNMR采集装置和方法，SNMR处理装置和方法及其组合。 根据各种相位循环技术中的任何一种，SNMR获取可以包括传送两个或更多个SNMR脉冲序列并将相移施加到至少一个脉冲序列中的脉冲。 SNMR处理可以包括从包括不同相位的脉冲的多个脉冲序列组合SNMR，使得保留期望的信号并消除不期望的信号。