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1. 发明授权

US06898339B2 Multiple mode pre-loadable fiber optic pressure and temperature sensor 有权
标题翻译：多模式预加载光纤压力和温度传感器
公开(公告)号：US06898339B2
公开(公告)日：2005-05-24
申请号：US10233355
申请日：2002-12-16
申请人： Jagdish Shah , Robert Schroeder , Philip Dryden , Rogerio Ramos , Raghu Madhavan
发明人： Jagdish Shah , Robert Schroeder , Philip Dryden , Rogerio Ramos , Raghu Madhavan
IPC分类号： G01J1/04 , G01J1/42 , G01L11/02 , G01M11/02 , G02B6/00
CPC分类号： G01M11/0221
摘要： A multiple mode pre-loadable fiber optic pressure and temperature sensor includes a generally cylindrical structure having at least one compression element, a fiber optic having a Bragg grating in contact with one side of the compression element, a diaphragm in contact with the other side of the compression element, and a fluid port in fluid communication with the diaphragm. According to preferred aspects of the, a groove is provided in at least one compression element for receiving the fiber optic. The sensor is pre-loaded by straining the diaphragm over the adjacent compression element when the cover is attached. The compression element in contact with the diaphragm preferably has a contoured surface contacting the diaphragm and the diaphragm is stretched to match that contour. By varying the contour of the compression element and the thickness of the diaphragm, the dynamic range of the sensor can be changed. The preferred diaphragm has a variable thickness and is made as an integral part of the structure. The sensor can be operated in normal, reverse, or differential mode.
摘要翻译：多模式预加载光纤压力和温度传感器包括具有至少一个压缩元件的大致圆柱形结构，具有与压缩元件的一侧接触的布拉格光栅的光纤，与另一侧接触的光阑压缩元件和与隔膜流体连通的流体端口。根据优选的方面，在至少一个用于接收光纤的压缩元件中设置有凹槽。当安装盖时，传感器通过将隔膜压在相邻的压缩元件上而进行预加载。与隔膜接触的压缩元件优选地具有与隔膜接触的轮廓表面，并且隔膜被拉伸以匹配该轮廓。通过改变压缩元件的轮廓和膜片的厚度，可以改变传感器的动态范围。优选的隔膜具有可变的厚度并且被制成为该结构的组成部分。传感器可以在正常，反向或差动模式下运行。

2. 发明授权

US09366092B2 Interface and method for wellbore telemetry system 有权
标题翻译：井眼遥测系统的接口和方法
公开(公告)号：US09366092B2
公开(公告)日：2016-06-14
申请号：US11995027
申请日：2006-08-03
申请人： Remi Hutin , David Santoso , Lise Hvatum , Christopher P. Reed , Raghu Madhavan , Jean-Marc Follini
发明人： Remi Hutin , David Santoso , Lise Hvatum , Christopher P. Reed , Raghu Madhavan , Jean-Marc Follini
IPC分类号： E21B47/01 , E21B47/12 , E21B17/00 , E21B17/02
CPC分类号： E21B17/003 , E21B17/028 , E21B47/12 , E21B47/122
摘要： A system for use in a drilling operation that includes uphole electronic equipment and a drill string suspended in an earth borehole, a section of wired drill pipe that is part of a communication link between a downhole tool and the uphole electronic equipment, an interface for communicating between the section of wired drill pipe and a communication source/destination. The system includes a housing having a generally cylindrical outer shape which has a passage there through. The housing has a WDP end connectable to the section of wired drill pipe and a further end connectable to the communication source/destination. The system also includes a WDP circuit module disposed within the housing. The WDP circuit module electrically coupleable with the wired drill pipe section. The system includes a further circuit module, disposed within the housing, which is electrically coupled with the WDP circuit module and electrically coupleable with the communication source/destination.
摘要翻译：一种用于钻井操作的系统，包括井上电子设备和悬挂在地球钻孔中的钻柱，作为井下工具与井上电子设备之间的通信链路的一部分的有线钻杆的一部分，用于通信的接口在有线钻杆的一段和通信源/目的地之间。该系统包括具有大致圆柱形的外部形状的壳体，其具有穿过其的通道。外壳具有可连接到有线钻杆部分的WDP端，以及可连接到通信源/目的地的另一端。该系统还包括设置在壳体内的WDP电路模块。 WDP电路模块与有线钻杆部分电连接。该系统包括设置在壳体内的另一电路模块，其与WDP电路模块电耦合并且可与通信源/目的地电耦合。

3. 发明授权

US09157313B2 Systems and methods for detecting drillstring loads 有权
标题翻译：检测钻柱载荷的系统和方法
公开(公告)号：US09157313B2
公开(公告)日：2015-10-13
申请号：US13486328
申请日：2012-06-01
申请人： Raghu Madhavan , Mark Sherman
发明人： Raghu Madhavan , Mark Sherman
IPC分类号： E21B47/00 , E21B17/02
CPC分类号： E21B47/0006 , E21B17/028
摘要： A drilling system comprises a drillstring including a dill bit, a bottomhole assembly coupled to the drill bit, and a plurality of interconnected tubular members coupled to the bottomhole assembly. A first tubular member includes a communication link having a first annular inductive coupler element disposed in an annular recess in a first end, a second annular inductive coupler element disposed in an annular recess in a second end, and a cable coupling the first annular inductive coupler element to the second annular inductive coupler element. In addition, the drilling system comprises a first signal level determination unit disposed in the drillstring and configured to determine a level of a first signal communicated from the second inductive coupler element. Further, the drilling system comprises an axial load determination unit configured to determine an axial load at the first signal level determination unit based on the level of the first signal.
摘要翻译：钻井系统包括钻柱，钻柱包括钻头，联接到钻头的井底组件和联接到井底组件的多个互连的管状构件。第一管状构件包括通信连接件，该连通连杆具有设置在第一端的环形凹部中的第一环形感应耦合器元件，设置在第二端的环形凹部中的第二环形感应耦合器元件，以及将第一环形感应耦合器元件连接到第二环形感应耦合元件。此外，钻井系统包括设置在钻柱中并被配置为确定从第二电感耦合器元件传递的第一信号的电平的第一信号电平确定单元。此外，钻井系统包括轴向负荷确定单元，其被配置为基于第一信号的电平来确定第一信号电平确定单元处的轴向负载。

4. 发明申请

US20130319768A1 Systems and Methods for Detecting Drillstring Loads 有权
标题翻译：检测钻柱载荷的系统和方法
公开(公告)号：US20130319768A1
公开(公告)日：2013-12-05
申请号：US13486328
申请日：2012-06-01
申请人： Raghu Madhavan , Mark Sherman
发明人： Raghu Madhavan , Mark Sherman
IPC分类号： E21B47/00
CPC分类号： E21B47/0006 , E21B17/028
摘要： A drilling system comprises a drillstring including a dill bit, a bottomhole assembly coupled to the drill bit, and a plurality of interconnected tubular members coupled to the bottomhole assembly. A first tubular member includes a communication link having a first annular inductive coupler element disposed in an annular recess in a first end, a second annular inductive coupler element disposed in an annular recess in a second end, and a cable coupling the first annular inductive coupler element to the second annular inductive coupler element. In addition, the drilling system comprises a first signal level determination unit disposed in the drillstring and configured to determine a level of a first signal communicated from the second inductive coupler element. Further, the drilling system comprises an axial load determination unit configured to determine an axial load at the first signal level determination unit based on the level of the first signal.
摘要翻译：钻井系统包括钻柱，钻柱包括钻头，联接到钻头的井底组件和联接到井底组件的多个互连的管状构件。第一管状构件包括通信连接件，该连通连杆具有设置在第一端的环形凹部中的第一环形感应耦合器元件，设置在第二端的环形凹部中的第二环形感应耦合器元件，以及将第一环形感应耦合器元件连接到第二环形感应耦合元件。此外，钻井系统包括设置在钻柱中并被配置为确定从第二电感耦合器元件传递的第一信号的电平的第一信号电平确定单元。此外，钻井系统包括轴向负荷确定单元，其被配置为基于第一信号的电平来确定第一信号电平确定单元处的轴向负载。

5. 发明授权

US08403332B2 Seal member 有权
标题翻译：密封件
公开(公告)号：US08403332B2
公开(公告)日：2013-03-26
申请号：US12647943
申请日：2009-12-28
申请人： Toru Noguchi , Hiroyuki Ueki , Shigeki Inukai , Masaei Ito , Raghu Madhavan , Morinobu Endo , Satoshi Iinou
发明人： Toru Noguchi , Hiroyuki Ueki , Shigeki Inukai , Masaei Ito , Raghu Madhavan , Morinobu Endo , Satoshi Iinou
IPC分类号： E21B33/10
CPC分类号： E21B33/10 , B82Y30/00 , C08J5/005 , C08J2327/18 , C09K3/1009 , F01C1/107 , F01C13/00 , F01C19/005 , F01C19/125 , F04C2/1075 , F04C13/008
摘要： The seal member includes a tetrafluoroethylene-propylene copolymer (FEPM) and carbon nanofibers. The seal member has a number of cycles to fracture of 10 or more when subjected to a tension fatigue test at a temperature of 150° C., a maximum tensile stress of 2 N/mm, and a frequency of 1 Hz. The seal member exhibits excellent heat resistance and abrasion resistance.
摘要翻译：密封件包括四氟乙烯 - 丙烯共聚物（FEPM）和碳纳米纤维。当在150℃的温度，2N / mm的最大拉伸应力和1Hz的频率下进行拉伸疲劳试验时，密封构件具有10个以上的断裂的循环次数。密封件表现出优异的耐热性和耐磨性。

6. 发明授权

US06866306B2 Low-loss inductive couplers for use in wired pipe strings 有权
标题翻译：用于有线管柱的低损耗感应耦合器
公开(公告)号：US06866306B2
公开(公告)日：2005-03-15
申请号：US09881333
申请日：2001-06-14
申请人： Bruce W. Boyle , Raghu Madhavan , Jacques Jundt
发明人： Bruce W. Boyle , Raghu Madhavan , Jacques Jundt
IPC分类号： E21B17/02 , E21B47/12 , F16L15/08 , F16L25/01 , F16L25/00
CPC分类号： E21B47/122 , E21B17/028 , F16L15/08 , F16L25/01 , Y10S439/95
摘要： A first flux-loop inductive coupler element electrically couples with a second flux-loop inductive coupler element. The first flux-loop inductive coupler element comprises a first ring-like core having high magnetic permeability and a conical-section annular first face transverse to the plane of the first core. The first face has a first annular groove separating a first conical-section larger-diameter face and a first conical-section smaller-diameter face. A first coil is wound within the annular groove. The first and second cores form a low-reluctance closed magnetic path around the first coil and a second coil of the second flux-loop inductive coupler element.A first current-loop inductive coupler element electrically couples with a second current-loop inductive coupler element. The first current-loop inductive coupler element has a first high-conductivity, low-permeability shaped belt of a first end of a first pipe joint, a first ring-like core located at the first end, and a first electrically conductive coil wound about the first ring-like core. The first high-conductivity, low-permeability shaped belt partially encloses the first coil. It is shaped to cooperate with the second high-conductivity, low-permeability shaped belt of an adjacent second pipe joint having a second electrically conductive coil and a second high-conductivity, low-permeability shaped belt to create a closed toroidal electrical conducting path. The closed toroidal electrical conducting path encloses the first coil and the second coil when the first and second pipe joints are mated.
摘要翻译：第一磁通回路感应耦合器元件与第二磁通回路感应耦合元件电耦合。第一磁通回路感应耦合器元件包括具有高导磁率的第一环状磁芯和横向于第一磁芯平面的圆锥形环形第一面。第一面具有分隔第一锥形部分大直径面和第一锥形部分较小直径面的第一环形槽。第一线圈缠绕在环形槽内。第一和第二磁芯形成围绕第一线圈的低磁阻闭合磁路和第二磁通回路感应耦合器元件的第二线圈。第一电流回路感应耦合器元件与第二电流回路感应耦合元件。第一电流回路感应耦合器元件具有第一管接头的第一端，位于第一端的第一环状磁芯和围绕第一管状接头卷绕的第一导电线圈的第一高导电率，低磁导率形状的带第一个环状核心。第一高导电率，低磁导率形状的带部分地包围第一线圈。它被成形为与具有第二导电线圈和第二高导电率，低导磁性形状的带的相邻的第二管接头的第二高导电率，低磁导率形状的带配合以产生闭合的环形导电路径。当第一和第二管接头配合时，封闭的环形导电通路包围第一线圈和第二线圈。

7. 发明授权

US08810428B2 Electrical transmission between rotating and non-rotating members 有权
标题翻译：旋转和非旋转构件之间的电气传输
公开(公告)号：US08810428B2
公开(公告)日：2014-08-19
申请号：US12202722
申请日：2008-09-02
申请人： Raghu Madhavan , Frederic Latrille
发明人： Raghu Madhavan , Frederic Latrille
IPC分类号： G01V3/18 , E21B47/12
CPC分类号： E21B47/12 , E21B4/02 , G01V11/002 , H01F38/18 , H01F2038/143
摘要： A rotary coupler for transferring electrical power and data between members is presented wherein the coupler has a first member having an internal surface, a first inductor positioned on the internal surface, a second member and a second inductor carried on a portion of the second member and positioned internal of the first inductor, wherein one of the inductors rotates relative to the other inductor.
摘要翻译：提供了一种用于在构件之间传递电力和数据的旋转耦合器，其中耦合器具有具有内表面的第一构件，位于内表面上的第一电感器，承载在第二构件的一部分上的第二构件和第二电感器，位于第一电感器的内部，其中一个电感器相对于另一个电感器旋转。

8. 发明授权

US08614273B2 Seal member 失效
标题翻译：密封件
公开(公告)号：US08614273B2
公开(公告)日：2013-12-24
申请号：US12647898
申请日：2009-12-28
申请人： Toru Noguchi , Hiroyuki Ueki , Shigeki Inukai , Masaei Ito , Raghu Madhavan , Morinobu Endo , Satoshi Iinou
发明人： Toru Noguchi , Hiroyuki Ueki , Shigeki Inukai , Masaei Ito , Raghu Madhavan , Morinobu Endo , Satoshi Iinou
IPC分类号： C08K3/04
CPC分类号： C08K7/06 , C08K2201/011 , C08L15/005
摘要： A seal member includes a hydrogenated acrylonitrile-butadiene rubber (HNBR) and carbon nanofibers. The seal member has a number of cycles to fracture of 7000 or more when subjected to a tensile fatigue test at a temperature of 70° C., a maximum tensile stress of 4 N/mm, and a frequency of 1 Hz. The seal member exhibits excellent abrasion resistance.
摘要翻译：密封件包括氢化丙烯腈 - 丁二烯橡胶（HNBR）和碳纳米纤维。当在70℃的温度，4N / mm的最大拉伸应力和1Hz的频率下进行拉伸疲劳试验时，密封构件具有7000以上的断裂的循环次数。密封件表现出优异的耐磨性。

9. 发明授权

US08398301B2 Apparatus for determining downhole fluid temperatures 有权
标题翻译：用于确定井下流体温度的装置
公开(公告)号：US08398301B2
公开(公告)日：2013-03-19
申请号：US12763218
申请日：2010-04-20
申请人： Raghu Madhavan , Michael Stangeland
发明人： Raghu Madhavan , Michael Stangeland
IPC分类号： E21B47/06 , G01K7/02
CPC分类号： E21B47/065 , E21B49/10
摘要： Apparatus for determining downhole fluid temperatures are described. An example apparatus for measuring a temperature of a downhole fluid includes a sensing element for measuring a physical or chemical property of the downhole fluid, and a plurality of electrical connections to enable the sensing element to measure the chemical or physical property and provide an output signal representative of the chemical or physical property, wherein at least one of the electrical connections is configured to function as a thermocouple to sense a temperature of the downhole fluid.
摘要翻译：描述了用于确定井下流体温度的装置。用于测量井下流体的温度的示例性装置包括用于测量井下流体的物理或化学特性的感测元件和多个电连接，以使感测元件能够测量化学或物理性质并提供输出信号代表化学或物理性质，其中至少一个电连接被配置为用作热电偶以感测井下流体的温度。

10. 发明申请

US20080159077A1 Cable link for a wellbore telemetry system 有权
标题翻译：井眼遥测系统的电缆连接
公开(公告)号：US20080159077A1
公开(公告)日：2008-07-03
申请号：US11648109
申请日：2006-12-29
申请人： Raghu Madhavan , David Santoso , Lise Hvatum
发明人： Raghu Madhavan , David Santoso , Lise Hvatum
IPC分类号： G01V1/22
CPC分类号： E21B17/028
摘要： A cable link may include a first link connector in signal communication with at least one sensor in a drill string and coupled to the drill string, a second link connector spaced apart from the first link connector and in signal communication with a telemetry system, the second connector link coupled to the drill string, and a linking cable having signal connectors at each end thereof, the linking cable having at least one of an electrical conductor and an optical fiber therein, the signal connectors each configured to latch proximate a respective one of the first and second link connector.
摘要翻译：电缆链路可以包括与钻柱中的至少一个传感器信号通信并耦合到钻柱的第一连接连接器，与第一连杆连接器间隔开并与遥测系统进行信号通信的第二连杆连接器，第二连杆连接器耦合到钻柱的连接器连接件，以及在其每个端部处具有信号连接器的连接电缆，所述连接电缆具有其中的电导体和光纤中的至少一个，所述信号连接器各自被配置为接近相应的一个第一和第二链接连接器。

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