HYDROGEN RESISTANT DOWNHOLE OPTICAL FIBER SENSING
    5.
    发明申请
    HYDROGEN RESISTANT DOWNHOLE OPTICAL FIBER SENSING 审中-公开
    耐腐蚀卧式光纤传感

    公开(公告)号:US20140158877A1

    公开(公告)日:2014-06-12

    申请号:US13711133

    申请日:2012-12-11

    IPC分类号: G01V8/02 G01V13/00

    摘要: An apparatus for estimating at least one parameter in a downhole environment includes: an optical fiber configured to be disposed in a borehole, the optical fiber including a core having a first index of refraction and a cladding surrounding the core and having a second index of refraction that is lower than the first index of refraction, at least a portion of the core being made from a hydrogen resistant material; at least one fiber Bragg grating (FBG) formed within the hydrogen resistant material; a light source configured to send an optical signal into the optical fiber; and a detector configured to receive a return signal generated by the at least one FBG and generate data representative of the at least one parameter.

    摘要翻译: 一种用于估计井下环境中的至少一个参数的装置包括:配置成设置在钻孔中的光纤,所述光纤包括具有第一折射率的芯和围绕所述芯的包层,并具有第二折射率 低于第一折射率,芯的至少一部分由耐氢材料制成; 形成在耐氢材料内的至少一个光纤布拉格光栅(FBG); 光源,被配置为将光信号发送到所述光纤中; 以及检测器,其被配置为接收由所述至少一个FBG生成的返回信号,并生成表示所述至少一个参数的数据。

    Loss compensation for distributed sensing in downhole environments
    6.
    发明授权
    Loss compensation for distributed sensing in downhole environments 有权
    井下环境中分布式传感损失补偿

    公开(公告)号:US09488531B2

    公开(公告)日:2016-11-08

    申请号:US14011067

    申请日:2013-08-27

    摘要: An apparatus for estimating a parameter includes: an optical fiber sensor including at least one optical fiber configured to be disposed in a downhole location and including at least one sensing location configured to generate measurement signals; at least one light source configured to transmit a measurement signal having a wavelength to interrogate a sensing location and cause the sensing location to return a reflected measurement signal indicative of a measured parameter, and configured to transmit a reference signal and cause a reflected reference signal to be returned from a location associated with the sensing location, the reflected reference signal having a known relationship to hydrogen concentration; and a processor configured to receive the reflected measurement signal and the reflected reference signal, estimate the hydrogen concentration based on the reflected reference signal, and calibrate the first reflected signal based on the estimated hydrogen concentration.

    摘要翻译: 一种用于估计参数的装置包括:光纤传感器,包括至少一个光纤,其被配置为设置在井下位置并且包括被配置为产生测量信号的至少一个感测位置; 至少一个光源被配置为传送具有波长的测量信号以询问感测位置,并使感测位置返回指示测量参数的反射测量信号,并且被配置为发送参考信号并使反射的参考信号 从与感测位置相关联的位置返回,反射参考信号与氢浓度具有已知关系; 以及处理器,被配置为接收反射的测量信号和反射的参考信号,基于反射的参考信号估计氢浓度,并且基于估计的氢浓度来校准第一反射信号。

    LOSS COMPENSATION FOR DISTRIBUTED SENSING IN DOWNHOLE ENVIRONMENTS
    7.
    发明申请
    LOSS COMPENSATION FOR DISTRIBUTED SENSING IN DOWNHOLE ENVIRONMENTS 有权
    水下环境中分布式感测的损失补偿

    公开(公告)号:US20150063418A1

    公开(公告)日:2015-03-05

    申请号:US14011067

    申请日:2013-08-27

    IPC分类号: G01K11/32

    摘要: An apparatus for estimating a parameter includes: an optical fiber sensor including at least one optical fiber configured to be disposed in a downhole location and including at least one sensing location configured to generate measurement signals; at least one light source configured to transmit a measurement signal having a wavelength to interrogate a sensing location and cause the sensing location to return a reflected measurement signal indicative of a measured parameter, and configured to transmit a reference signal and cause a reflected reference signal to be returned from a location associated with the sensing location, the reflected reference signal having a known relationship to hydrogen concentration; and a processor configured to receive the reflected measurement signal and the reflected reference signal, estimate the hydrogen concentration based on the reflected reference signal, and calibrate the first reflected signal based on the estimated hydrogen concentration.

    摘要翻译: 一种用于估计参数的装置包括:光纤传感器,包括至少一个光纤,其被配置为设置在井下位置并且包括被配置为产生测量信号的至少一个感测位置; 至少一个光源被配置为传送具有波长的测量信号以询问感测位置,并使感测位置返回指示测量参数的反射测量信号,并且被配置为发送参考信号并使反射的参考信号 从与感测位置相关联的位置返回,反射参考信号与氢浓度具有已知关系; 以及处理器,被配置为接收反射的测量信号和反射的参考信号,基于反射的参考信号估计氢浓度,并且基于估计的氢浓度来校准第一反射信号。

    Extended Temperature Fiber Optic Cable Design
    9.
    发明申请
    Extended Temperature Fiber Optic Cable Design 有权
    扩展温度光纤电缆设计

    公开(公告)号:US20120243881A1

    公开(公告)日:2012-09-27

    申请号:US13053851

    申请日:2011-03-22

    IPC分类号: H04B10/12 G02B6/04 G02B6/44

    摘要: A fiber optic cable for use in a downhole environment is disclosed. The fiber optic cable includes a tube having an interior region; an optical fiber disposed in the interior region of the tube; a gas in the interior region; and a gel in the interior region, wherein the gel is configured to reduce stress on the optical fiber in the presence of the gas at a temperature substantially near the flashpoint of the gel. One or more seals can be used to seal the gel and the inert gas in the interior region. In various aspects, the fiber optic cable can be used in a downhole environment.

    摘要翻译: 公开了一种用于井下环境的光缆。 光缆包括具有内部区域的管; 设置在所述管的内部区域中的光纤; 内部气体; 和内部区域中的凝胶,其中所述凝胶构造成在基本上接近凝胶闪点的温度下,在气体存在下减小光纤上的应力。 可以使用一个或多个密封件来密封内部区域中的凝胶和惰性气体。 在各个方面,光缆可以在井下环境中使用。