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    • 8. 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。