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公开(公告)号：EP2935778A1
公开(公告)日：2015-10-28
申请号：EP13863931.5
申请日：2013-12-18
IPC分类号： E21B47/01 , E21B47/024 , E21B7/04
CPC分类号： E21B47/01 , E21B33/0385 , E21B47/12 , H01R13/523
摘要： Disclosed are downhole probes in which electrical interconnections between different modules are achieved without wiring harnesses. Modules may be coupled to one another and/or to bulkheads in the probe my couplings that provide substantially rigid couplings. The couplings may be configured to connect together only in one orientation. Electrical connectors may be fixed relative to components of the couplings so that the electrical connectors are automatically aligned for connection by the couplings.
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2.发明公开METHOD AND APPARATUS FOR MULTI-CHANNEL DOWNHOLE ELECTROMAGNETIC TELEMETRY 审中-公开VERFAHREN UND VORRICHTUNGFÜRMEHRKANALIGE ELEKTROMAGNETISCHE BOHRLOCHTELEMETRIE
公开(公告)号：EP2929142A1
公开(公告)日：2015-10-14
申请号：EP13860325.3
申请日：2013-12-06
发明人： XU, Mingdong , LIU, Jili , SWITZER, David A. , LOGAN, Aaron W.
CPC分类号： E21B47/122 , H04B13/02 , H04L27/02 , H04L27/10 , H04L27/18 , H04L27/2601 , H04L27/28
摘要： An electromagnetic (EM) telemetry method comprises encoding downhole data into a single data stream; separating the single data stream into a plurality of separate data streams; converting each separate data stream into a corresponding separate waveform using a selected digital modulation technique wherein at least one of the frequency and phase of each waveform is assigned a unique value or unique non-overlapping range of values; combining each separate waveform into a combined waveform; and transmitting from a downhole location, an electromagnetic (EM) telemetry carrier wave comprising the combined waveform.
摘要翻译： 电磁（EM）遥测方法包括将井下数据编码为单个数据流; 将单个数据流分离成多个单独的数据流; 使用所选择的数字调制技术将每个单独的数据流转换成相应的单独的波形，其中每个波形的频率和相位中的至少一个被分配唯一的值或唯一的非重叠的值的范围; 将每个单独的波形组合成一个组合的波形; 以及从井下位置发射包括组合波形的电磁（EM）遥测载波。
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公开(公告)号：EP3158166B1
公开(公告)日：2019-07-10
申请号：EP15811733.3
申请日：2015-05-08
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公开(公告)号：EP3418488A1
公开(公告)日：2018-12-26
申请号：EP18187620.2
申请日：2013-09-05
摘要： A range of apparatus and methods for providing local and long range data telemetry within a wellbore is described. These apparatus and methods may be combined in a wide variety of ways. In some embodiments data is transmitted across a gap in a drill string using signals of a higher frequency for which an electrical impedance of the gap or of a filter connected across the gap is low. Low-frequency EM telemetry signals may be applied across the gap. The gap and any filter connected across the gap present a high impedance to the low-frequency EM telemetry signals. The described technology may be applied for transferring sensor readings between downhole electrical packages. In some embodiments sensors are electrically connected across electrically insulating gaps in the drill string.
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公开(公告)号：EP2917481B1
公开(公告)日：2018-02-21
申请号：EP13854109.9
申请日：2013-11-06
发明人： LOGAN, Aaron W. , DERKACZ, Patrick R. , LOGAN, Justin C. , SWITZER, David A. , LIU, Jili (Jerry) , KAZEMI MIRAKI, Mojtaba
CPC分类号： E21B47/122 , E21B17/003 , E21B47/01
摘要： An assembly for use in subsurface drilling includes a downhole probe having an EM telemetry signal generator and electrical contacts for carrying telemetry signals from the EM telemetry signal generator to first and second parts of a gap sub in a drill string. An outside surface of the probe and an inside surface of the gap sub are covered with layers of electrically-insulating material. Electrical conduction paths internal to the gap sub are removed, thereby increasing efficiency of EM telemetry.
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公开(公告)号：EP2920402A1
公开(公告)日：2015-09-23
申请号：EP13855824.2
申请日：2013-11-15
发明人： LOGAN, Aaron W. , AHMOYE, Daniel W. , SWITZER, David A. , LOGAN, Justin C. , DERKACZ, Patrick R. , KAZEMI, Mojtaba
CPC分类号： E21B17/028 , E21B17/003 , E21B17/042 , E21B17/046 , F16L15/08 , F16L25/02 , F16L25/021 , F16L2201/40
摘要： An insulating collar for a gap sub assembly for electromagnetic (EM) telemetry used in downhole drilling is disclosed. The gap sub assembly comprises a female member comprising a female mating section and a male member comprising a male mating section and a gap section. The male mating section is matingly received within the female mating section and electrically isolated therefrom. The insulating collar is positioned on the gap section. The collar is made up of a framework with a plurality of discrete bodies spaced about the framework and a portion of each of the discrete bodies protrudes above the framework. Either the framework or the discrete bodies are made of an electrical insulator material to electrically isolate one end of the collar from the other end of the collar. The collar therefore electrically isolates the male member from the female member and the male member, female member and insulating collar function as the “gap sub” for EM telemetry.
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公开(公告)号：EP2959103B1
公开(公告)日：2019-05-29
申请号：EP14754839.0
申请日：2014-02-25
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公开(公告)号：EP3042023B1
公开(公告)日：2018-08-08
申请号：EP13892882.5
申请日：2013-09-05
CPC分类号： E21B47/122 , E21B17/003
摘要： A range of apparatus and methods for providing local and long range data telemetry within a wellbore is described. These apparatus and methods may be combined in a wide variety of ways. In some embodiments data is transmitted across a gap in a drill string using signals of a higher frequency for which an electrical impedance of the gap or of a filter connected across the gap is low. Low-frequency EM telemetry signals may be applied across the gap. The gap and any filter connected across the gap present a high impedance to the low-frequency EM telemetry signals. The described technology may be applied for transferring sensor readings between downhole electrical packages. In some embodiments sensors are electrically connected across electrically insulating gaps in the drill string.
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9.发明公开OPTIMIZING DOWNHOLE DATA COMMUNICATION WITH AT BIT SENSORS AND NODES 有权百日乐BOHRLOCHDATENKOMMUNIKATION麻省理工学院传感器传感器
公开(公告)号：EP3158166A1
公开(公告)日：2017-04-26
申请号：EP15811733.3
申请日：2015-05-08
发明人： DERKACZ, Patrick R. , LOGAN, Aaron W. , LOGAN, Justin C. , LIU, Jili , SWITZER, David A. , HARRIS, Robert , BUTERNOWSKY, Barry Daniel , WEST, Kurtis
CPC分类号： E21B47/122 , E21B47/04
摘要： Data is communicated from sensors at a downhole location near a drill bit to surface equipment. Communication to the surface equipment may be direct or may pass through a series of nodes. The nodes in some cases are intelligently reconfigured to achieve desired data rates, achieve power management goals, and/or compensate for failed nodes.
摘要翻译： 数据从靠近钻头的井下位置的传感器传送到地面设备。 与地面设备的通信可能是直接的或可能通过一系列节点。 在某些情况下，节点被智能地重新配置以实现所需的数据速率，实现功率管理目标和/或补偿故障节点。
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10.发明公开TELEMETRY SYSTEMS WITH COMPENSATION FOR SIGNAL DEGRADATION AND RELATED METHODS 审中-公开赔偿的信号退化和相关手续遥测系统
公开(公告)号：EP3004540A1
公开(公告)日：2016-04-13
申请号：EP14803393.9
申请日：2014-05-30
发明人： LOGAN, Aaron W. , LIU, Jili , SWITZER, David A.
CPC分类号： E21B47/18
摘要： This invention comprises systems, methods and apparatus for mud pulse telemetry involving sending benchmark pulses with known characteristics (such as amplitude or duration) from the surface to the BHA, measuring those characteristics at the BHA, using those measurements to predict the likely attenuation of downhole-to-surface mud pulse transmissions, and adjusting those transmissions to compensate for high attenuation or to obtain energy savings (or transmission rate increases) during low-attenuation conditions. Further refinements on these systems and methods, particularly concerning the use of signal-to-noise ratio measurements at the surface to more efficiently predict attenuation, are also disclosed.
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