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1. 发明授权

US5467019A Method and apparatus for balancing the electrical output of the receiver coils of an induction logging tool by use of a slidable magnetic rod for eliminating direct coupling 失效
标题翻译：用于通过使用用于消除直接耦合的可滑动磁棒平衡感应测井工具的接收器线圈的电输出的方法和装置
公开(公告)号：US5467019A
公开(公告)日：1995-11-14
申请号：US203809
申请日：1994-03-01
申请人： Robert A. Lester , David Beard , Milton E. Cram
发明人： Robert A. Lester , David Beard , Milton E. Cram
IPC分类号： G01V3/28 , G01V13/00 , G01V3/10 , G01N27/72
CPC分类号： G01V3/28 , G01V13/00
摘要： In an induction logger, a method for nulling the output signal from a pair of series-coupled receiver coils by altering the magnetic flux distribution within the coils by use of one or more magnetic equalization bodies. The shape and aspect ratio of the equalization body are chosen to minimize temperature dependence of the initial permeability. Alternatively, a highly conductive equalization body may be used.
摘要翻译：在感应记录器中，通过使用一个或多个磁均衡体来改变线圈内的磁通量分布来使来自一对串联接收器线圈的输出信号为零的方法。选择均衡体的形状和纵横比来最小化初始磁导率的温度依赖性。或者，可以使用高导电均衡体。

2. 发明授权

US06307652B1 Fault tolerant optical communication apparatus and method 失效
标题翻译：容错光通信设备及方法
公开(公告)号：US06307652B1
公开(公告)日：2001-10-23
申请号：US09069060
申请日：1998-04-28
申请人： Mohammed Fassih-Nia , Ernest A. Cisneros , Milton E. Cram , Donald Ray Taylor
发明人： Mohammed Fassih-Nia , Ernest A. Cisneros , Milton E. Cram , Donald Ray Taylor
IPC分类号： H04B1020
CPC分类号： H04B10/27 , H04B10/275
摘要： An optical communication system (11) includes a plurality of nodes (16,17,18,19), each node connected in a first optical communication path (22) and a second optical communication path (23) extending parallel to the first optical communication path. The first optical communication path (22) is joined to each node by a first receiver (30) and first transmitter (31), while the second optical communication path (23) is joined to each node by a second receiver (32) and second transmitter (33). One of the nodes comprises a control unit node (19) having a control unit (37) associated therewith. The other nodes of the communication system comprise data unit nodes, each having a data unit (36) associated therewith. The communication system (11) normally operates with the control unit (37) in an open mode of operation in which data is not transferred across the node. Thus, in normal operation, the communication system (11) operates in an open ring configuration. When a fault occurs on the optical communication path (22,23) between adjacent data units, the system detects the fault and switches the control unit (37) to a closed mode of operation in which data is transferred along both optical communication paths (22,23) across the control unit node (19).
摘要翻译：光通信系统（11）包括多个节点（16,17,18,19），每个节点连接在第一光通信路径（22）中，第二光通信路径（23）平行于第一光通信路径。第一光通信路径（22）由第一接收机（30）和第一发射机（31）连接到每个节点，而第二光通信路径（23）由第二接收机（32）连接到每个节点，第二光通信路径发射机（33）。一个节点包括具有与其相关联的控制单元（37）的控制单元节点（19）。通信系统的其他节点包括数据单元节点，每个节点具有与其相关联的数据单元（36）。通信系统（11）通常以控制单元（37）操作，其中数据不跨越节点传送的开放操作模式。因此，在正常操作中，通信系统（11）以开环配置工作。当在相邻数据单元之间的光通信路径（22,23）发生故障时，系统检测到故障，并将控制单元（37）切换到封闭的操作模式，其中数据沿着两条光通信路径（22 ，23）跨越控制单元节点（19）。

3. 发明授权

US5631562A Time domain electromagnetic well logging sensor including arcuate microwave strip lines 失效
标题翻译：时域电磁测井传感器，包括弧形微波带线
公开(公告)号：US5631562A
公开(公告)日：1997-05-20
申请号：US533188
申请日：1995-09-25
申请人： Milton E. Cram , Thomas A. Janes
发明人： Milton E. Cram , Thomas A. Janes
IPC分类号： G01V3/30 , G01V3/12 , G01R27/02
CPC分类号： G01V3/30
摘要： An electromagnetic well logging tool for imaging the electrical characteristics of a borehole. A tool inserted into the borehole includes the appropriate mechanical apparatus to align a plurality of transmission lines adjacent to the borehole wall without requiring direct electrical contact. Electrical circuitry applies a step or impulse voltage on one end and samples the reflections at the same end of each transmission line, where the reflections indicate the magnitude of any changes of dielectric constant of the material of the borehole wall. The transmission lines are preferably angled relative to the center line of the borehole for a complete mapping of the circumference. The tool is moved at a desired speed through the portion of the borehole where measurement is desired. The sampling rate of the reflections depends on the desired speed of the tool and the desired resolution of the measurements.
摘要翻译：一种电磁测井工具，用于对钻孔的电气特性进行成像。插入钻孔中的工具包括适当的机械装置，以使与钻孔壁相邻的多个传输线对准，而不需要直接的电接触。电路在一端施加步进或脉冲电压，并在每个传输线的同一端采样反射，其中反射指示井壁的材料的介电常数的任何变化的大小。传输线优选地相对于钻孔的中心线成角度，以便圆周的完整映射。工具以期望的速度移动通过需要测量的钻孔部分。反射的采样率取决于工具的期望速度和所需的测量分辨率。

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