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    • 3. 发明授权
    • Side-hole cane waveguide sensor
    • 侧孔拐杖波导传感器
    • US08494322B2
    • 2013-07-23
    • US12716035
    • 2010-03-02
    • Alan D. KerseyJohn L. Maida
    • Alan D. KerseyJohn L. Maida
    • G02B6/26
    • G02B6/02314E21B47/123G01L1/242G01L1/245G01L1/246G01L11/025G02B6/021G02B6/022G02B6/02338G02B6/024G02B6/028G02B6/0281G02B6/262
    • A side-hole optical cane for measuring pressure and/or temperature is disclosed. The side-hole cane has a light guiding core containing a sensor and a cladding containing symmetrical side-holes extending substantially parallel to the core. The side-holes cause an asymmetric stress across the core of the sensor creating a birefringent sensor. The sensor, preferably a Bragg grating, reflects a first and second wavelength each associated with orthogonal polarization vectors, wherein the degree of separation between the two is proportional to the pressure exerted on the core. The side-hole cane structure self-compensates and is insensitive to temperature variations when used as a pressure sensor, because temperature induces an equal shift in both the first and second wavelengths. Furthermore, the magnitude of these shifts can be monitored to deduce temperature, hence providing the side-hole cane additional temperature sensing capability that is unaffected by pressure. Additionally, the side-hole cane can be used to measure a differential pressure between a first pressure ported to the side-holes and a second external pressure.
    • 公开了用于测量压力和/或温度的侧孔光学手杖。 侧孔拐杖具有包含传感器和包含基本上平行于芯延伸的对称侧壁的包层的导光芯。 侧孔在传感器的核心上产生不对称应力,产生双折射传感器。 传感器,优选布拉格光栅,反射与正交偏振矢量相关联的第一和第二波长,其中两者之间的分离度与施加在芯上的压力成比例。 当用作压力传感器时,侧孔手杖结构自我补偿并且对温度变化不敏感,因为温度在第一和第二波长两者中都产生相等的移动。 此外,可以监测这些位移的大小以推断温度,从而提供不受压力影响的侧孔拐角附加温度检测能力。 此外,侧孔手杖可用于测量端口与侧孔的第一压力和第二外部压力之间的差压。
    • 4. 发明申请
    • Optical Fiber Based Downhole Seismic Sensor Systems and Methods
    • 基于光纤的井下地震传感器系统和方法
    • US20120257475A1
    • 2012-10-11
    • US13082522
    • 2011-04-08
    • John LuscombeEtienne M. SamsonJohn L. Maida
    • John LuscombeEtienne M. SamsonJohn L. Maida
    • G01V1/48
    • G01V1/226G01V1/288G01V1/42G01V1/48G01V8/24G01V2210/1234
    • Various optical fiber-based seismic monitoring system embodiments include a light source that drives an optical fiber positioned within a borehole. At least one light sensor analyzes Rayleigh backscattered light to obtain an acoustic signal for each of multiple points along the borehole. One or more processors operate to determine microseismic event direction, distance, and/or intensity based at least in part on phase information of said acoustic signals. The acoustic signal cross-correlations, semblances, or phase-sensitive similarity measures can be determined as a function of scanning direction to accurately determine the relevant microseismic event information. The optical fiber may be positioned in the cemented annulus of a cased borehole having a shape that extends along more than one dimension (e.g., an L-shaped borehole).
    • 各种基于光纤的地震监测系统实施例包括驱动位于钻孔内的光纤的光源。 至少一个光传感器分析瑞利背散射光以获得沿着钻孔的多个点中的每一个的声信号。 至少部分地基于所述声信号的相位信息,一个或多个处理器操作以确定微震事件方向,距离和/或强度。 可以根据扫描方向确定声信号互相关,相似或相敏相似性度量,以准确地确定相关的微震事件信息。 光纤可以定位在具有沿多于一个尺寸延伸的形状(例如,L形钻孔)的套管钻孔的胶结环空中。
    • 6. 发明授权
    • Side-hole cane waveguide sensor
    • 侧孔拐杖波导传感器
    • US07669440B2
    • 2010-03-02
    • US11179868
    • 2005-07-12
    • Alan D. KerseyJohn L. Maida
    • Alan D. KerseyJohn L. Maida
    • C03B37/022
    • G02B6/02314E21B47/123G01L1/242G01L1/245G01L1/246G01L11/025G02B6/021G02B6/022G02B6/02338G02B6/024G02B6/028G02B6/0281G02B6/262
    • A side-hole optical cane for measuring pressure and/or temperature is disclosed. The side-hole cane has a light guiding core containing a sensor and a cladding containing symmetrical side-holes extending substantially parallel to the core. The side-holes cause an asymmetric stress across the core of the sensor creating a birefringent sensor. The sensor, preferably a Bragg grating, reflects a first and second wavelength each associated with orthogonal polarization vectors, wherein the degree of separation between the two is proportional to the pressure exerted on the core. The side-hole cane structure self-compensates and is insensitive to temperature variations when used as a pressure sensor, because temperature induces an equal shift in both the first and second wavelengths. Furthermore, the magnitude of these shifts can be monitored to deduce temperature, hence providing the side-hole cane additional temperature sensing capability that is unaffected by pressure. Additionally, the side-hole cane can be used to measure a differential pressure between a first pressure ported to the side-holes and a second external pressure.
    • 公开了用于测量压力和/或温度的侧孔光学手杖。 侧孔拐杖具有包含传感器和包含基本上平行于芯延伸的对称侧壁的包层的导光芯。 侧孔在传感器的核心上产生不对称应力,产生双折射传感器。 传感器,优选布拉格光栅,反射与正交偏振矢量相关联的第一和第二波长,其中两者之间的分离度与施加在芯上的压力成比例。 当用作压力传感器时,侧孔手杖结构自我补偿并且对温度变化不敏感,因为温度在第一和第二波长两者中都产生相等的移动。 此外,可以监测这些位移的大小以推断温度,从而提供不受压力影响的侧孔拐角附加温度检测能力。 此外,侧孔手杖可用于测量端口与侧孔的第一压力和第二外部压力之间的差压。
    • 7. 发明申请
    • OPTICAL CASING COLLAR LOCATOR SYSTEMS AND METHODS
    • 光学定位系统和方法
    • US20130056197A1
    • 2013-03-07
    • US13226578
    • 2011-09-07
    • John L. MaidaEtienne M. Samson
    • John L. MaidaEtienne M. Samson
    • E21B47/00E21B31/06
    • E21B47/0905E21B47/123
    • Disclosed are fiber optic enabled casing collar locator systems including a wireline sonde or a coil tubing sonde apparatus configured to be conveyed through a casing string by a fiber optic cable. The sonde includes at least one permanent magnet producing a magnetic field that changes in response to passing a collar in the casing string. Such magnetic field changes induce voltages changes within associated pick-up electrical coil conductors. Some embodiments include a cylinder configured to change its diameter in response to the changes in the magnetic field and/or impressed voltage, and an optical fiber wound around the cylinder to convert the cylinder diameter change into an optical path length change for light being communicated along the fiber optic cable. The cylinder may include a magnetostrictive material or a piezoelectric material.
    • 公开了具有启用光纤的套管套管定位器系统,其包括被配置成通过光缆被输送通过套管柱的有线探头或线圈管探头装置。 探头包括至少一个产生磁场的永磁体,该磁场响应于套管柱中的套环而改变。 这种磁场变化引起相关的拾取电线圈导体内的电压变化。 一些实施例包括一个圆柱体,其被配置为响应于磁场和/或外加电压的变化而改变其直径,以及缠绕在圆柱体上的光纤,以将气缸直径变化转换为光路长度变化 光纤电缆。 气缸可以包括磁致伸缩材料或压电材料。
    • 10. 发明授权
    • Optical casing collar locator systems and methods
    • 光学套管定位系统及方法
    • US09127531B2
    • 2015-09-08
    • US13226578
    • 2011-09-07
    • John L. MaidaEtienne M. Samson
    • John L. MaidaEtienne M. Samson
    • E21B47/09E21B47/12
    • E21B47/0905E21B47/123
    • Fiber optic enabled casing collar locator systems and methods including a wireline sonde or a coil tubing sonde apparatus configured to be conveyed through a casing string by a fiber optic cable. The sonde includes at least one permanent magnet producing a magnetic field that changes in response to passing a collar in the casing string. Such magnetic field changes induce voltages changes within associated pick-up electrical coil conductors. Some embodiments include a cylinder configured to change its diameter in response to the changes in the magnetic field and/or impressed voltage, and an optical fiber wound around the cylinder to convert the cylinder diameter change into an optical path length change for light being communicated along the fiber optic cable. The cylinder may include a magnetostrictive material or a piezoelectric material.
    • 光纤启用套管定位器系统和方法,包括被配置成通过光缆被输送通过套管柱的有线探头或线圈管探头装置。 探头包括至少一个产生磁场的永磁体,该磁场响应于套管柱中的套环而改变。 这种磁场变化引起相关的拾取电线圈导体内的电压变化。 一些实施例包括一个圆柱体,其被配置为响应于磁场和/或外加电压的变化而改变其直径,以及缠绕在圆柱体上的光纤,以将气缸直径变化转换为光路长度变化 光纤电缆。 气缸可以包括磁致伸缩材料或压电材料。