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1. 发明公开

EP2418466A3 Fiber optic cable for distributed acoustic sensing with increased acoustic sensitivity 有权转让
标题翻译： Glasfaserkabelfürverteiltes akustisches Abtasten miterhöhterAkustikempfindlichkeit
公开(公告)号：EP2418466A3
公开(公告)日：2014-03-05
申请号：EP11250594.6
申请日：2011-06-17
申请人： Weatherford/Lamb, Inc.
发明人： Taverner, Domino , Grunbeck, John J. , Dunphy, James R. , Dowd, Edward M. , Kuczma, Andrew S. , Bostick III, Francis X. , Baker, Mark , LaBella, David
IPC分类号： G01H9/00 , E21B47/12
CPC分类号： G01H9/004 , E21B47/123 , G01V2210/1429 , G02B6/02342 , G02B6/02395 , G02B6/4433
摘要： Methods and apparatus for performing Distributed Acoustic Sensing (DAS) using fiber optics with increased acoustic sensitivity are provided. Acoustic sensing of a wellbore, pipeline, or other conduit/tube based on DAS may have increased acoustic sensitivity through fiber optic cable design and/or increasing the Rayleigh backscatter property of a fiber's optical core. Some embodiments may utilize a resonant sensor mechanism with a high Q coupled to the DAS device for increased acoustic sensitivity.
摘要翻译：提供了使用具有增加的声学灵敏度的光纤进行分布式声学感测（DAS）的方法和装置。基于DAS的井眼，管道或其他管道/管的声学感测可以通过光纤电缆设计增加声学灵敏度和/或增加光纤的光学核心的瑞利反向散射特性。一些实施例可以利用具有耦合到DAS装置的高Q的谐振传感器机构来提高声学灵敏度。

2. 发明公开

EP2980537A1 MULTI-PEAK REFERENCE GRATING 有权转让
标题翻译： MEHRFACHSPITZEN-REFERENZGITTER
公开(公告)号：EP2980537A1
公开(公告)日：2016-02-03
申请号：EP15179029.2
申请日：2015-07-30
申请人： Weatherford/Lamb, Inc.
发明人： Taverner, Domino
IPC分类号： G01D5/26 , G01D5/353
CPC分类号： G01M11/335 , G01D5/35316 , G01D5/35387 , G01M11/331
摘要： Methods and apparatus are provided for using a multi-peak reference grating as an optical reference element to produce an optical spectrum with a plurality of reference wavelength peaks spanning a desired wavelength range. This multi-peak reference grating is suitable for use in swept-wavelength interrogation systems, such as those utilizing Bragg grating sensors. Each of the reference wavelength peaks may be characterized for absolute wavelength over a range of environmental operating conditions, such that the absolute wavelength of each reference wavelength peak can be found at any time given the contemporaneous environmental operating condition. This reference grating is interrogated concurrently with the Bragg grating sensors, and the position of each sensor peak relative to the reference grating peaks is used to calculate the absolute wavelength of each sensor (and hence, the corresponding parameter of interest).
摘要翻译：提供了使用多峰参考光栅作为光学参考元件以产生具有跨越期望波长范围的多个参考波长峰值的光谱的方法和装置。该多峰参考光栅适用于扫频波长询问系统，例如使用布拉格光栅传感器的扫描系统。每个参考波长峰值可以在环境操作条件的范围内被表征为绝对波长，使得在给定同时期的环境操作条件的情况下，可以在任何时候发现每个参考波长峰值的绝对波长。该参考光栅与布拉格光栅传感器同时询问，并且每个传感器峰值相对于参考光栅峰值的位置用于计算每个传感器的绝对波长（因此，相应的相关参数）。

3. 发明公开

EP2418466A2 Fiber optic cable for distributed acoustic sensing with increased acoustic sensitivity 有权转让
标题翻译：具有提高的声学灵敏度分布声学感测光缆
公开(公告)号：EP2418466A2
公开(公告)日：2012-02-15
申请号：EP11250594.6
申请日：2011-06-17
申请人： Weatherford/Lamb, Inc.
发明人： Taverner, Domino , Grunbeck, John J. , Dunphy, James R. , Dowd, Edward M. , Kuczma, Andrew S. , Bostick III, Francis X. , Baker, Mark , LaBella, David
IPC分类号： G01H9/00
CPC分类号： G01H9/004 , E21B47/123 , G01V2210/1429 , G02B6/02342 , G02B6/02395 , G02B6/4433
摘要： Methods and apparatus for performing Distributed Acoustic Sensing (DAS) using fiber optics with increased acoustic sensitivity are provided. Acoustic sensing of a wellbore, pipeline, or other conduit/tube based on DAS may have increased acoustic sensitivity through fiber optic cable design and/or increasing the Rayleigh backscatter property of a fiber's optical core. Some embodiments may utilize a resonant sensor mechanism with a high Q coupled to the DAS device for increased acoustic sensitivity.

4. 发明公开

EP2369389A1 Optical fiber coating to prevent adhesion at high temperatures 有权转让
标题翻译： Glasfaserbeschichtung zur Haftungsverhinderung bei hohen温度
公开(公告)号：EP2369389A1
公开(公告)日：2011-09-28
申请号：EP11250364.4
申请日：2011-03-24
申请人： Weatherford/Lamb, Inc.
发明人： Dowd, Edward M. , Grunbeck, John J. , Taverner, Domino
IPC分类号： G02B6/44 , E21B47/12
CPC分类号： G02B6/4436 , B05D5/08 , E21B47/123 , G02B6/4415 , G02B6/443 , G02B6/4486 , G02B6/4488 , Y10T29/49885
摘要： Embodiments of the present invention provide methods and apparatus for cables having one or more fibers that may function as a sensing device within a wellbore, wherein the fibers do not adhere to each other or to an inner wall of the cable during a high temperature operation, such as in a thermal recovery operation that may last over 30 days.
摘要翻译：本发明的实施例提供了一种用于具有一个或多个纤维的电缆的方法和装置，该纤维可以用作井筒内的感测装置，其中在高温操作期间，纤维彼此不粘附到电缆的内壁，例如可能持续超过30天的热回收操作。

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