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1. 发明专利

AU7050500A Methods and apparatus for mechanically enhancing the sensitivity of longitudinally loaded fiber optic sensors 未知
公开(公告)号：AU7050500A
公开(公告)日：2000-12-05
申请号：AU7050500
申请日：2000-05-17
申请人： RAGHU MADHAVAN
IPC分类号： G01L1/24 , G01L9/00
摘要： An optical fiber is provided with a Bragg grating formed along a portion of its core and a mechanical structure arranged adjacent to the Bragg grating for amplifying longitudinal strain on the fiber in the vicinity of the grating. The mechanical structure is designed to convert ambient pressure into longitudinal strain on the fiber in the vicinity of the grating and to allow the fiber to pass through the structure so that several pressure measuring apparatus may be arranged along a single optical fiber. An intermediate structure is provided between the fiber and the mechanical structure for minimizing buckling of the fiber. The methods of the invention include converting pressure into longitudinal strain on an optical fiber, amplifying the effect of pressure on the longitudinal strain, measuring pressure by determining the spectral location related to peaks (or minimums) of light reflected from an optical grating subjected to longitudinal strain.

2. 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。

3. 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。

4. 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。

5. 发明申请

US20110156355A1 SEAL MEMBER 失效
标题翻译：密封会员
公开(公告)号：US20110156355A1
公开(公告)日：2011-06-30
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： E21B33/10 , E21B33/00 , C08K3/04 , C08K3/36 , C08K3/34
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。

6. 发明申请

US20100052941A1 ELECTRICAL TRANSMISSION BETWEEN ROTATING AND NON-ROTATING MEMBERS 有权
标题翻译：旋转和非旋转成员之间的电气传输
公开(公告)号：US20100052941A1
公开(公告)日：2010-03-04
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： G01V3/34 , H01F38/14 , H02K11/00
CPC分类号： E21B47/12 , E21B4/02 , G01V11/002 , H01F38/18 , H01F2038/143
摘要： A rotary coupler includes 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：旋转耦合器包括具有内表面的第一构件，位于内表面上的第一电感器，第二构件和承载在第二构件的一部分上并位于第一电感器内部的第二电感器，其中电感器之一相对于另一个电感器旋转。

7. 发明申请

US20100007519A1 METHOD AND CONDUIT FOR TRANSMITTING SIGNALS 有权
标题翻译：用于发送信号的方法和传输
公开(公告)号：US20100007519A1
公开(公告)日：2010-01-14
申请号：US12172484
申请日：2008-07-14
申请人： RAGHU MADHAVAN , Bruce W. Boyle , Brian Clark
发明人： RAGHU MADHAVAN , Bruce W. Boyle , Brian Clark
IPC分类号： G01V3/00
CPC分类号： H02G3/0481 , E21B17/003 , G01V3/18 , G01V11/002 , H01B13/00 , H01R43/00 , H02G3/0437 , H02G9/10 , Y10T29/49117 , Y10T29/49119
摘要： An expandable tubular sleeve having utility for lining a downhole tubular member includes a tubular body having a portion that is predisposed to initiate expansion thereof under the application of internal fluid pressure. The predisposed portion of the body may be a plastically-deformed portion formed, e.g., by application of mechanical force to a wall of the body. The predisposed portion of the body may be defined by a portion of the body having reduced wall thickness. The reduced wall thickness may be achieved, e.g., by reinforcing the wall thickness everywhere except the predisposed portion. The predisposed portion of the body may be formed by modifying the material properties of the body, e.g., by localized heat treatment. The sleeve and related apparatuses and methods are useful for securing and protecting a cable having one or more insulated conductive wires for transmission of signals between locations downhole and at the surface.
摘要翻译：具有用于衬套井下管状构件的可膨胀管状套管包括管状体，其具有在内部流体压力的应用下倾向于引发其膨胀的部分。身体的易位部分可以是例如通过向身体的壁施加机械力而形成的塑性变形部分。主体的易位部分可以由具有减小的壁厚的主体的一部分限定。减小的壁厚可以例如通过增强除了预定部分之外的任何地方的壁厚来实现。可以通过例如通过局部热处理来改变身体的材料性质来形成身体的易位部分。套筒和相关装置和方法可用于固定和保护具有一个或多个绝缘导线的电缆，用于在井下和地面之间的位置之间传输信号。

8. 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。

9. 发明申请

US20080158005A1 Method and apparatus for locating faults in wired drill pipe 有权
标题翻译：定位钻杆故障的方法和装置
公开(公告)号：US20080158005A1
公开(公告)日：2008-07-03
申请号：US11648139
申请日：2006-12-29
申请人： David Santoso , Dudi Rendusara , Hiroshi Nakajima , Kanu Chadha , Raghu Madhavan , Lise Hvatum
发明人： David Santoso , Dudi Rendusara , Hiroshi Nakajima , Kanu Chadha , Raghu Madhavan , Lise Hvatum
IPC分类号： G01V3/00
CPC分类号： E21B17/028
摘要： A method for determining electrical condition of a wired drill pipe includes inducing an electromagnetic field in at least one joint of wired drill pipe. Voltages induced by electrical current flowing in at least one electrical conductor in the at least one wired drill pipe joint are detected. The electrical current is induced by the induced electromagnetic field. The electrical condition is determined from the detected voltages.
摘要翻译：一种用于确定有线钻杆的电气状况的方法包括在有线钻杆的至少一个接头中引入电磁场。检测由在至少一个有线钻管接头中的至少一个电导体中流动的电流而引起的电压。电流由感应电磁场引起。电气条件由检测到的电压确定。

10. 发明申请

US20050087368A1 DOWNHOLE TELEMETRY SYSTEM AND METHOD 有权
标题翻译：井下电报系统和方法
公开(公告)号：US20050087368A1
公开(公告)日：2005-04-28
申请号：US10605730
申请日：2003-10-22
申请人： BRUCE BOYLE , NICOLAS PACAULT , JEAN-MICHEL HACHE , REMI HUTIN , RAGHU MADHAVAN , JACQUES JUNDT
发明人： BRUCE BOYLE , NICOLAS PACAULT , JEAN-MICHEL HACHE , REMI HUTIN , RAGHU MADHAVAN , JACQUES JUNDT
IPC分类号： E21B47/12 , E21B17/02 , E21B47/00 , E21B7/00
CPC分类号： E21B47/12 , E21B17/023 , E21B17/028 , E21B47/122
摘要： A cabled communication link for a drill string includes spaced apart adapter subs within the drill string and a cable connecting the adapter subs for communication of a signal therebetween. The cabled communication link may be drill pipe joints are interconnected within the drill string between adapter subs to form a piped communication link, whereby the cabled communication link establishes a pathway to the piped communication link for transmitting a signal through the drill string. The cabled communication link may also be in a non-wired section of the drill string is disposed between adapter subs, whereby the cabled communication link establishes a pathway for transmitting a signal through the non-wired section of the drill string. Inductive couplings are preferably used for communication across the adapter subs and wired drill pipe joints. Another aspect of the cabled communication employs wireless transceivers at or near the surface of the wellbore.
摘要翻译：用于钻柱的电缆通信链路包括在钻柱内的间隔开的适配器，以及连接适配器接头以用于在其间进行信号通信的电缆。电缆通信链路可以是钻杆接头在适配器接头之间的钻柱内互连以形成管道通信链路，由此有线通信链路建立到管道通信链路的路径，用于通过钻柱发送信号。电缆通信链路也可以在钻柱的非有线部分中设置在适配器接头之间，由此有线通信链路建立用于通过钻柱的非有线部分发送信号的路径。电感耦合器最好用于通过适配器接头和有线钻杆接头进行通信。电缆通信的另一方面在井眼表面处或附近采用无线收发器。

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