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7 条记录 (耗时 0.019 秒)

    Apparatus and method for making nuclear magnetic measurements in a borehole
    1.
    发明授权
    Apparatus and method for making nuclear magnetic measurements in a borehole 有权
    在井眼中进行核磁测量的装置和方法

    公开(公告)号：US6163151A

    公开(公告)日：2000-12-19

    申请号：US150137

    申请日：1998-09-09

    申请人： Macmillan M. Wisler ,  David M. Schneider

    发明人： Macmillan M. Wisler ,  David M. Schneider

    IPC分类号： G01R33/44 ,  G01V3/32 ,  G01V3/00

    CPC分类号： G01N24/081 ,  G01V3/32

    摘要： An NMR logging tool has a conducting permanent magnet with its axis parallel to the borehole axis to produce a static field in a portion of the formation surrounding a borehole that is parallel to the borehole axis. A dipole RF antenna with the dipole axis orthogonal to the borehole axis is used to produce an RF magnetic field orthogonal to the static field. The same antenna is used to receive the echo signals from excited nuclei in the formation. A number of gapped ferrite strips on the permanent magnet shield the permanent magnet from the RF field and enhance the RF field. Another form of the tool may be used for making Measurement-While-Drilling measurements with the permanent magnet set in a recess on a drilling collar.

    摘要翻译： NMR测井工具具有导电永磁体，其轴线平行于钻孔轴线，以在围绕钻孔轴线的钻孔周围的地层的一部分中产生静电场。 使用具有与钻孔轴正交的偶极轴的偶极RF天线来产生与静态场正交的RF磁场。 使用相同的天线来接收地层中激发的核的回波信号。 永磁体上的多个带隙的铁氧体磁条从RF场屏蔽永磁体并增强RF场。 该工具的另一种形式可用于进行钻孔测量，永久磁铁设置在钻铤上的凹槽中。

    Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement
    3.
    发明授权
    Method of processing data from a dual detector LWD density logging instrument coupled with an acoustic standoff measurement 有权
    从双检测器LWD密度测井仪处理数据的方法与声学隔离测量结合

    公开(公告)号：US07129477B2

    公开(公告)日：2006-10-31

    申请号：US10400402

    申请日：2003-03-27

    申请人： David M. Schneider ,  Sergey V. Efremov ,  Matthew J. Sale

    发明人： David M. Schneider ,  Sergey V. Efremov ,  Matthew J. Sale

    IPC分类号： G01V5/14

    CPC分类号： G01V5/107 ,  G01V5/125

    摘要： A logging-while-drilling density sensor includes a gamma ray source and at least two NaI detectors spaced apart from the source for determining measurements indicative of the formation density. An acoustic caliper is used for making standoff measurements of the NaI detectors. Measurements made by the detectors are partitioned into standoff bins. An adaptive spine and rib method uses the standoff measurements to obtain density estimates. The method of the invention may also be used with neutron porosity logging devices.

    摘要翻译： 钻井测井密度传感器包括伽马射线源和与源间隔开的至少两个NaI检测器，用于确定指示地层密度的测量值。 使用声学测厚仪进行NaI检测器的隔离测量。 由检测器进行的测量被分割成间隔箱。 自适应脊柱和肋法使用间隔测量来获得密度估计。 本发明的方法也可以与中子孔隙度测井装置一起使用。

    Method and apparatus for nuclear logging using lithium detector assemblies
    5.
    发明授权
    Method and apparatus for nuclear logging using lithium detector assemblies 失效
    使用锂探测器组件进行核采伐的方法和装置

    公开(公告)号：US5196698A

    公开(公告)日：1993-03-23

    申请号：US786728

    申请日：1991-11-01

    申请人： David M. Schneider

    发明人： David M. Schneider

    IPC分类号： G01V5/10

    CPC分类号： G01V5/107

    摘要： A method and apparatus for nuclear logging, and in particular, neutron porosity logging is presented. In accordance with the present invention, a pair of spaced lithium detectors, preferably Li.sup.6 I crystal or Li.sup.6 doped glass are used to detect neutrons emitted from a borehole formation being logged. In addition, novel data processing is used to determine the neutron count from the spectrum developed by the lithium detectors. This novel data processing comprises fitting a Gaussian curve to the neutron peak of the spectrum. The Gaussian curve does not include the hydrogen absorption peak of the spectrum. The area under this Gaussian curve represents the neutron count. Accordingly, a more accurate neutron count is obtained which does not include gamma rays attributed to hydrogen absorption.

    摘要翻译： 提出了一种用于核测井的方法和装置，特别是中子孔隙度测井。 根据本发明，使用一对间隔开的锂检测器，优选Li 6 I晶体或Li 6掺杂玻璃来检测从被记录的井眼结构发射的中子。 另外，使用新的数据处理来确定由锂检测器开发的光谱中的中子数。 这种新颖的数据处理包括将高斯曲线拟合到光谱的中子峰。 高斯曲线不包括光谱的氢吸收峰。 该高斯曲线下的面积代表中子数。 因此，获得不包括归因于氢吸收的伽马射线的更精确的中子计数。

    Refractory period tracking and arrhythmia detection
    7.
    发明授权
    Refractory period tracking and arrhythmia detection 有权
    难治期跟踪和心律失常检测

    公开(公告)号：US07184832B2

    公开(公告)日：2007-02-27

    申请号：US10680528

    申请日：2003-10-07

    申请人： D. Curtis Deno ,  Ruth N. Klepfer ,  William J. Havel ,  David M. Schneider ,  Vincent E. Splett

    发明人： D. Curtis Deno ,  Ruth N. Klepfer ,  William J. Havel ,  David M. Schneider ,  Vincent E. Splett

    IPC分类号： A61N1/365

    CPC分类号： A61N1/365 ,  A61N1/3622

    摘要： Techniques and apparatus for estimating the temporal refractory period of a heart, for adjusting a parameter for delivery of extra-systolic stimulation (ESS) therapy and for detecting an arrhythmia during delivery of ESS therapy In some aspects, probe pulses are periodically delivered to estimate the location of the end boundary of the refractory period, and accordingly estimate its length. In some embodiments, the parameter is adjusted based on estimated length of the refractory period. For example, an extra-systolic interval (ESI) for delivery of ESS is adjusted to be a fixed interval longer than estimated lengths of the refractory period. In other aspects, the parameter is adjusted based on a measured delay (or latency) between delivery of an ESS pulse and detection of an evoked response resulting from the pulse. Also, delays between delivery of an ESS pulse and detection of a subsequent depolarization are monitored to detect an arrhythmia.

    摘要翻译： 用于估计心脏的时间不应期的技术和装置，用于调整用于递送收缩期刺激（ESS）治疗的参数和用于在递送ESS治疗期间检测心律失常的一些方面，定期递送探针脉冲以估​​计 不应期结束边界的位置，并据此估计其长度。 在一些实施例中，基于估计的不应期的长度来调整参数。 例如，用于递送ESS的收缩期间期（ESI）被调整为比不应期的估计长度更长的固定间隔。 在其他方面，基于在递送ESS脉冲和从脉冲产生的诱发响应的检测之间的测量延迟（或等待时间）来调整参数。 此外，监测递送ESS脉冲和检测随后的去极化之间的延迟以检测心律失常。