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21. 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。

22. 发明授权

US06186227B1 Packer 有权
公开(公告)号：US06186227B1
公开(公告)日：2001-02-13
申请号：US09295915
申请日：1999-04-21
申请人： Vladimir Vaynshteyn , James D. Hendrickson , Jim B. Benton , Raghu Madhavan , Mitchell G. Willcox , Dinesh R. Patel
发明人： Vladimir Vaynshteyn , James D. Hendrickson , Jim B. Benton , Raghu Madhavan , Mitchell G. Willcox , Dinesh R. Patel
IPC分类号： E21B2304
CPC分类号： E21B43/116 , E21B33/126 , E21B33/1295 , E21B34/063
摘要： A packer for use inside a casing of a subterranean well includes a resilient element, a housing and a rupture disc. The resilient element is adapted to seal off an annulus of the well when compressed, and the housing is adapted to compress the resilient element in response to a pressure exerted by fluid of the annulus of a piston head of the housing. The housing includes a port for establishing fluid communication with the annulus. The rupture disc is adapted to prevent the fluid in the annulus from entering the port and contacting the piston head until the pressure exerted by the fluid exceeds a predefined threshold and ruptures the rupture disc.

23. 发明授权

US08344905B2 Method and conduit for transmitting signals 有权
标题翻译：传输信号的方法和管道
公开(公告)号：US08344905B2
公开(公告)日：2013-01-01
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 , E21B17/02
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。

24. 发明授权

US08072347B2 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：US08072347B2
公开(公告)日：2011-12-06
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。

25. 发明申请

US20070188344A1 Wellbore telemetry system and method 有权
标题翻译：井眼遥测系统及方法
公开(公告)号：US20070188344A1
公开(公告)日：2007-08-16
申请号：US11648041
申请日：2006-12-29
申请人： Jean-Michel Hache , Remi Hutin , Raghu Madhavan , David Santoso
发明人： Jean-Michel Hache , Remi Hutin , Raghu Madhavan , David Santoso
IPC分类号： G01V3/00
CPC分类号： E21B47/12
摘要： A hybrid telemetry system for passing signals between a surface control unit and a downhole tool is provided. The downhole tool is deployed via a drill string into a wellbore penetrating a subterranean formation. The hybrid telemetry system includes an uphole connector, a downhole connector, and a cable operatively connecting the uphole and downhole connectors. The uphole connector is operatively connectable to a drill string telemetry system for communication therewith. The downhole connector is operatively connectable to the downhole tool for communication therewith.
摘要翻译：提供了用于在表面控制单元和井下工具之间传递信号的混合遥测系统。井下工具通过钻柱部署到穿透地下地层的井眼中。混合遥测系统包括井上连接器，井下连接器和可操作地连接井上和井下连接器的缆索。井上连接器可操作地连接到用于与其通信的钻柱遥测系统。井下连接器可操作地连接到井下工具以与其通信。

26. 发明授权

US06641434B2 Wired pipe joint with current-loop inductive couplers 有权
公开(公告)号：US06641434B2
公开(公告)日：2003-11-04
申请号：US10160311
申请日：2002-05-31
申请人： Bruce W. Boyle , Raghu Madhavan , Jacques Jundt
发明人： Bruce W. Boyle , Raghu Madhavan , Jacques Jundt
IPC分类号： H01R33945
CPC分类号： F16L15/08 , E21B17/028 , F16L25/01 , Y10S439/95
摘要： A robust, low-loss wired pipe joint is provided for service as a component of a wired pipe string for transmitting measurement data to a surface station from locations in a borehole in oil well drilling and oil well operations. Conductive layers reduce signal energy losses over the length of the drill string by reducing resistive losses and flux losses at each inductive coupler. The wired pipe joint is robust in that it remains operational in the presence of gaps in the conductive layer. A wired pipe joint includes an elongate tubular shank having an axial bore, a threaded box-end, and a threaded pin end. A first annular coil, fixedly mounted to the box-end is partially surrounded by a first high-conductivity, low-permeability layer, and a second annular coil fixedly mounted to the pin-end is partially surrounded by a second high-conductivity, low-permeability layer, such that when the box-end of a first wired pipe joint is coupled for operation with the pin-end of a second wired pipe joint, the first and second high-conductivity, low-permeability layers form at least a portion of a toroidal path enclosing the first annular coil of the first wired pipe joint and the second annular coil of the second wired pipe joint. Coil windings of the first and second coils of the wired pipe joint are electrically coupled.

27. 发明授权

US06304686B1 Methods and apparatus for measuring differential pressure with fiber optic sensor systems 有权
标题翻译：用光纤传感器系统测量差压的方法和装置
公开(公告)号：US06304686B1
公开(公告)日：2001-10-16
申请号：US09500501
申请日：2000-02-09
申请人： Tsutomu Yamate , Rogerio T Ramos , Raghu Madhavan , Robert J. Schroeder
发明人： Tsutomu Yamate , Rogerio T Ramos , Raghu Madhavan , Robert J. Schroeder
IPC分类号： G02B600
CPC分类号： G01L11/025 , G01L9/0076 , G01L9/0089
摘要： Methods and apparatus for measuring differential pressure with fiber optic sensor systems are disclosed. The apparatus of the present invention include both monopolar and bipolar sensors, sensors incorporating side-hole fibers, sensors incorporating fibers without side holes, FBGs subjected to transverse strain, and FBGs subjected to longitudinal strain. All of the embodiments utilize FBGs. Two embodiments utilize a piston having oppositely extending rods, each of which is exposed to a different pressure. Seven embodiments utilize one or more silica diaphragms coupled to a silica body and exposed to two pressures. In each of these embodiments, pressure is converted into movement of the piston or diaphragm which is then used to strain the FBG(s). When each FBG is interrogated, the spectral information is indicative of the strain exerted by the piston or diaphragm on the FBG and thus the difference between the two pressures. Tenth and eleventh embodiments provide apparatus and methods of measuring a differential pressure.
摘要翻译：公开了用光纤传感器系统测量差压的方法和装置。本发明的装置包括单极和双极传感器，包含侧孔光纤的传感器，包含没有侧孔的光纤的传感器，经受横向应变的FBG和经受纵向应变的FBG。所有实施例都使用FBG。两个实施例利用具有相对延伸的杆的活塞，每个杆暴露于不同的压力。七个实施例利用一个或多个耦合到二氧化硅体并暴露于两个压力的二氧化硅隔膜。在这些实施例的每一个中，压力被转换成活塞或隔膜的运动，然后将其用于应变FBG。当询问每个FBG时，光谱信息表示活塞或隔膜对FBG施加的应变，因此表示两个压力之间的差异。第十和第十一实施例提供测量差压的装置和方法。

28. 发明授权

US06246048B1 Methods and apparatus for mechanically enhancing the sensitivity of longitudinally loaded fiber optic sensors 有权
标题翻译：用于机械增强纵向加载光纤传感器灵敏度的方法和装置
公开(公告)号：US06246048B1
公开(公告)日：2001-06-12
申请号：US09313603
申请日：1999-05-18
申请人： Rogerio T. Ramos , Raghu Madhavan , Tsutomu Yamate , Stephen C. Balkunas , Robert J. Schroeder
发明人： Rogerio T. Ramos , Raghu Madhavan , Tsutomu Yamate , Stephen C. Balkunas , Robert J. Schroeder
IPC分类号： H01J516
CPC分类号： G01L1/246
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.
摘要翻译：光纤具有沿其芯部的一部分形成的布拉格光栅和布置在布拉格光栅附近的机械结构，用于放大光栅附近的光纤上的纵向应变。机械结构被设计成将环境压力转换成在光栅附近的光纤上的纵向应变，并允许光纤通过结构，使得可以沿着单个光纤布置多个压力测量装置。在纤维和机械结构之间提供中间结构以最小化纤维的弯曲。本发明的方法包括将压力转换成光纤上的纵向应变，通过确定与经受纵向光栅的光栅反射的光的峰值（或最小值）相关的光谱位置来扩大压力对纵向应变的影响，测量压力应变。

29. 发明授权

US09109439B2 Wellbore telemetry system and method 有权
标题翻译：井眼遥测系统及方法
公开(公告)号：US09109439B2
公开(公告)日：2015-08-18
申请号：US11648041
申请日：2006-12-29
申请人： Jean-Michel Hache , Remi Hutin , Raghu Madhavan , David Santoso
发明人： Jean-Michel Hache , Remi Hutin , Raghu Madhavan , David Santoso
IPC分类号： G01V3/00 , E21B47/00 , E21B47/12
CPC分类号： E21B47/12
摘要： A hybrid telemetry system for passing signals between a surface control unit and a downhole tool is provided. The downhole tool is deployed via a drill string into a wellbore penetrating a subterranean formation. The hybrid telemetry system includes an uphole connector, a downhole connector, and a cable operatively connecting the uphole and downhole connectors. The uphole connector is operatively connectable to a drill string telemetry system for communication therewith. The downhole connector is operatively connectable to the downhole tool for communication therewith.
摘要翻译：提供了用于在表面控制单元和井下工具之间传递信号的混合遥测系统。井下工具通过钻柱部署到穿透地下地层的井眼中。混合遥测系统包括井上连接器，井下连接器和可操作地连接井上和井下连接器的缆索。井上连接器可操作地连接到用于与其通信的钻柱遥测系统。井下连接器可操作地连接到井下工具以与其通信。

30. 发明授权

US08164476B2 Wellbore telemetry system and method 有权
标题翻译：井眼遥测系统及方法
公开(公告)号：US08164476B2
公开(公告)日：2012-04-24
申请号：US12873772
申请日：2010-09-01
申请人： Jean-Michel Hache , Remi Hutin , Raghu Madhavan , David Santoso
发明人： Jean-Michel Hache , Remi Hutin , Raghu Madhavan , David Santoso
IPC分类号： G03V3/00
CPC分类号： E21B47/12
摘要： A hybrid telemetry system for passing signals between a surface control unit and a downhole tool is provided. The downhole tool is deployed via a drill string into a wellbore penetrating a subterranean formation. The hybrid telemetry system includes an uphole connector, a downhole connector, and a cable operatively connecting the uphole and downhole connectors. The uphole connector is operatively connectable to a drill string telemetry system for communication therewith. The downhole connector is operatively connectable to the downhole tool for communication therewith.
摘要翻译：提供了用于在表面控制单元和井下工具之间传递信号的混合遥测系统。井下工具通过钻柱部署到穿透地下地层的井眼中。混合遥测系统包括井上连接器，井下连接器和可操作地连接井上和井下连接器的缆索。井上连接器可操作地连接到用于与其通信的钻柱遥测系统。井下连接器可操作地连接到井下工具以与其通信。

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