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公开(公告)号：US20120197529A1
公开(公告)日：2012-08-02
申请号：US13321933
申请日：2010-05-21
摘要： Systems, methods, and devices for inelastic gamma-ray logging are provided. In one embodiment, such a method includes emitting neutrons into a subterranean formation from a downhole tool to produce inelastic gamma-rays, detecting a portion of the inelastic gamma-rays that scatter back to the downhole tool to obtain an inelastic gamma-ray signal, and determining a property of the subterranean formation based at least in part on the inelastic gamma-ray signal. The inelastic gamma-ray signal may be substantially free of epithermal and thermal neutron capture background.
摘要翻译： 提供了用于非弹性伽马射线测井的系统，方法和装置。 在一个实施例中，这种方法包括从井下工具将中子发射到地层中以产生非弹性γ射线，检测散射回井下工具的一部分非弹性γ射线以获得非弹性γ射线信号， 以及至少部分地基于所述非弹性γ射线信号确定所述地下地层的性质。 非弹性γ射线信号可以基本上不含超热和热中子捕获背景。
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公开(公告)号：US09897719B2
公开(公告)日：2018-02-20
申请号：US13321933
申请日：2010-05-21
IPC分类号： G01V5/10
摘要： Systems, methods, and devices for inelastic gamma-ray logging are provided. In one embodiment, such a method includes emitting neutrons into a subterranean formation from a downhole tool to produce inelastic gamma-rays, detecting a portion of the inelastic gamma-rays that scatter back to the downhole tool to obtain an inelastic gamma-ray signal, and determining a property of the subterranean formation based at least in part on the inelastic gamma-ray signal. The inelastic gamma-ray signal may be substantially free of epithermal and thermal neutron capture background.
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3.发明授权Logging-while-drilling tool incorporating electronic radiation generator and method for using same 有权采用电子辐射发生器的同步钻孔工具及其使用方法公开(公告)号：US08742328B2
公开(公告)日：2014-06-03
申请号：US12959485
申请日：2010-12-03
IPC分类号： G01V5/12 , G01V5/04 , G01N23/083
摘要： Logging-while-drilling tools incorporating an electronic radiation generator, such as an electronic X-ray generator, and a method for using the same are provided. One example of such a logging-while-drilling tool may include a circumferential drill collar, a chassis disposed radially interior to the drill collar, and an electronic X-ray generator and an X-ray detector disposed within the chassis. The electronic X-ray generator may emit X-rays out of the logging-while-drilling tool into a subterranean formation. The X-ray detector may detect X-rays that return to the logging-while-drilling tool after scattering in the subterranean formation, which may be used to determine a density and/or a lithology of the subterranean formation.
摘要翻译： 提供了包括诸如电子X射线发生器的电子辐射发生器的同时钻孔工具及其使用方法。 这种钻井测井工具的一个例子可以包括圆周钻铤，径向设置在钻铤内部的底盘，以及设置在底盘内的电子X射线发生器和X射线探测器。 电子X射线发生器可以将X射线从测井钻井工具中排出到地层中。 X射线检测器可以检测在地下地层散射之后返回到钻井测井工具的X射线，其可以用于确定地下岩层的密度和/或岩性。
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4.发明申请公开(公告)号：US20120138782A1
公开(公告)日：2012-06-07
申请号：US12959485
申请日：2010-12-03
IPC分类号： G01V5/12
摘要： Logging-while-drilling tools incorporating an electronic radiation generator, such as an electronic X-ray generator, and a method for using the same are provided. One example of such a logging-while-drilling tool may include a circumferential drill collar, a chassis disposed radially interior to the drill collar, and an electronic X-ray generator and an X-ray detector disposed within the chassis. The electronic X-ray generator may emit X-rays out of the logging-while-drilling tool into a subterranean formation. The X-ray detector may detect X-rays that return to the logging-while-drilling tool after scattering in the subterranean formation, which may be used to determine a density and/or a lithology of the subterranean formation.
摘要翻译： 提供了包括诸如电子X射线发生器的电子辐射发生器的同时钻孔工具及其使用方法。 这种钻井测井工具的一个例子可以包括圆周钻铤，径向设置在钻铤内部的底盘，以及设置在底盘内的电子X射线发生器和X射线探测器。 电子X射线发生器可以将X射线从测井钻井工具中排出到地层中。 X射线检测器可以检测在地下地层散射之后返回到钻井测井工具的X射线，其可以用于确定地下岩层的密度和/或岩性。
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公开(公告)号：US20130211724A1
公开(公告)日：2013-08-15
申请号：US13807681
申请日：2011-06-27
IPC分类号： G01V5/10
摘要： The present disclosure is intended to overcome the problem of hydrogen contamination of the density signal. The approach is to compute the neutron capture portion of the total gamma ray counts and subtract it from the total counts resulting in a pure inelastic gamma ray measurement.
摘要翻译： 本公开旨在克服密度信号的氢污染问题。 该方法是计算总伽马射线计数的中子俘获部分，并从总计数中减去，从而产生纯非弹性伽马射线测量。
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公开(公告)号：US20080110253A1
公开(公告)日：2008-05-15
申请号：US11558746
申请日：2006-11-10
CPC分类号： E21B49/005 , G01N21/65 , G01N21/658 , G01N2201/0697 , G01V8/02
摘要： A method and apparatus for measuring a substance in formations surrounding an earth borehole being drilled with a drill bit at the end of a drill string, using drilling fluid that flows downward through the drill string, exits through the drill bit entrained with drilled earth formation cuttings, and returns toward the earth's surface in the annulus between the drill string and the borehole, the method including the following steps: waiting for any of the substance that is dissolved in the drilling fluid to be substantially in equilibrium with any of the substance in the earth formation cuttings; and then measuring, downhole, the substance dissolved in the drilling fluid.
摘要翻译： 一种用于测量围绕钻孔的地层钻孔中的物质的方法和装置，其钻头在钻柱的端部使用钻井液向下流过钻柱，通过钻入钻地层切屑的钻头离开 并返回到钻柱和钻孔之间的环空中的地球表面，该方法包括以下步骤：等待溶解在钻井液中的任何物质基本上与任何物质在 地层切割; 然后测量，井下，溶解在钻井液中的物质。
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公开(公告)号：US5543617A
公开(公告)日：1996-08-06
申请号：US266077
申请日：1994-06-27
CPC分类号： E21B47/1015 , G01F1/708
摘要： A method of measuring flow velocities in flowing fluids includes injecting into the flow a non-radioactive tracer having a neutron capture cross section higher than that of the flowing fluids, for example a gadolinium compound, and measuring the neutron capture cross section in the fluid downstream of the injection point to detect the passage of the tracer and hence determine the time of flight. By making the tracer miscible with only one phase (typically the continuous phase) of a multi-phase fluid, it is possible to measure the flow velocity of that phase. The neutron capture cross section can be measured by irradiating with neutrons from a pulsed neutron generator and measuring capture .gamma. rays with a scintillation detector.
摘要翻译： 测量流动流体中的流速的方法包括向流中注入具有高于流动流体例如钆化合物的中子捕获截面的非放射性示踪剂，并测量下游流体中的中子俘获截面 的注射点，以检测示踪物的通过，从而确定飞行时间。 通过使示踪剂仅与多相流体的一相（通常为连续相）混溶，可以测量该相的流速。 中子捕获截面可以通过用来自脉冲中子发生器的中子照射并用闪烁检测器测量捕获γ射线来测量。
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8.发明授权
公开(公告)号：US5191517A
公开(公告)日：1993-03-02
申请号：US568924
申请日：1990-08-17
CPC分类号： H05H5/04
摘要： A particle accelerator comprises a Cockcroft-Walton voltage multiplier that provides linear axial and radial fields. The Cockcroft-Walton voltage multiplier includes capacitors that are arranged radially relative to one another, such that a linear voltage increase occurs between the capacitors. The particle accelerator is made by placing conductive foils on an insulating sheet, connecting the foils as a Cockcroft-Walton voltage multiplier, and rolling the insulating sheet with the foils into a cylinder to form the radially arranged capacitors.
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公开(公告)号：US4710675A
公开(公告)日：1987-12-01
申请号：US728135
申请日：1985-04-29
CPC分类号： H01J43/06
摘要： A photomultiplier includes a solid disk dynode and a pair of annular guiding electrodes disposed about the disk dynode transversely along the central axis of the photomultiplier tube on opposite sides of the dynode. The secondary and subsequent dynodes may be of conventional (e.g. venetian blind) construction or of solid disk construction. The solid disk dynode and guiding structure exhibits improved photoelectron pulse-height resolution and a better signal-to-noise ratio than a conventional venetian blind type dynode. In addition, the solid dynode structure is less susceptible to physical shock than conventional photomultiplier dynode designs.
摘要翻译： 光电倍增管包括固体磁盘倍增电极和一对环形引导电极，沿着光电倍增管的中心轴在倍增极的相对侧横向设置在盘倍增器周围。 次级和随后的倍增电极可以是常规的（例如，威尼斯盲）结构或实心盘结构。 固体磁盘倍增电极和引导结构表现出比常规的百叶窗型倍增极更好的光电子脉冲高度分辨率和更好的信噪比。 另外，固体倍增极结构比传统的光电倍增管设计不太容易受到物理冲击。
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公开(公告)号：US09357629B2
公开(公告)日：2016-05-31
申请号：US12393462
申请日：2009-02-26
CPC分类号： H05H3/06
摘要： A neutron generator includes a sealed envelope providing a low pressure environment for a gas. One end of the envelope defines an ion source chamber. A target electrode is disposed at the other end of the envelope. An extracting electrode is spaced apart from the target electrode by an accelerating gap. The extracting electrode bounds the ion source chamber. A dispenser cathode electrode and grid electrode are disposed in the ion source chamber for inducing ionization in the ion source chamber. The dispenser cathode electrode, the grid electrode and the extracting electrode operate at a positive high voltage potential and the target electrode operates at or near ground potential. This configuration provides an electric field gradient that accelerates ions towards the target electrode to induce collisions of ions with target material, thereby causing fusion reactions that generate neutrons. High voltage power supply circuit means supplies a positive high voltage signal to the electrodes of the ion source. The positive high voltage signal has a low voltage signal component floating on a positive high voltage signal component. For the dispensing cathode electrode, the low voltage signal component can be a DC or AC signal suitable for emitting electrons from the dispensing cathode electrode. For the grid electrode, the low voltage signal component can be a positive pulsed-mode signal (preferably with magnitude in the range between 100 to 300 volts). High voltage insulation surrounds and electrically insulates the high voltage power supply circuit means. Other ion source electrode configurations, such as cold cathode (Penning) ion source and RF-driven ion source, can also be used.
摘要翻译： 中子发生器包括为气体提供低压环境的密封外壳。 信封的一端限定离子源室。 目标电极设置在信封的另一端。 提取电极通过加速间隙与目标电极间隔开。 提取电极界定离子源室。 分配器阴极电极和栅电极设置在离子源室中，用于在离子源室中诱导离子化。 分配器阴极电极，栅电极和提取电极以正高电位工作，目标电极工作在或接近地电位。 该配置提供电场梯度，其将离子加速到靶电极以引起离子与靶材料的碰撞，从而引起产生中子的聚变反应。 高电压电源电路为离子源的电极提供正高电压信号。 正高电压信号具有浮置在正高电压信号分量上的低电压信号分量。 对于分配阴极电极，低电压信号分量可以是适于从分配阴极电极发射电子的DC或AC信号。 对于栅格电极，低电压信号分量可以是正脉冲模式信号（优选地在100至300伏之间的幅度范围内）。 高压绝缘包围并电绝缘高压电源电路装置。 还可以使用其它离子源电极配置，例如冷阴极（Penning）离子源和RF驱动的离子源。
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