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    • 4. 发明公开
    • MULTI-PEAK REFERENCE GRATING
    • MEHRFACHSPITZEN-REFERENZGITTER
    • EP2980537A1
    • 2016-02-03
    • EP15179029.2
    • 2015-07-30
    • Weatherford/Lamb, Inc.
    • Taverner, Domino
    • G01D5/26G01D5/353
    • G01M11/335G01D5/35316G01D5/35387G01M11/331
    • 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).
    • 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)。
    • 8. 发明公开
    • SLIDING SLEEVE HAVING CONTRACTING, DUAL SEGMENTED BALL SEAT
    • 滑套有承包,双段式球座
    • EP2932022A2
    • 2015-10-21
    • EP13814777.2
    • 2013-12-13
    • Weatherford/Lamb, Inc.
    • CAST, Michael, W.WILKIN, James, F.
    • E21B34/14E21B43/26E21B23/04
    • E21B34/14E21B43/12E21B43/26E21B2034/007Y10T137/0318Y10T137/7781
    • A sliding sleeve opens with a deployed ball. The sleeve has a seat disposed in the housing, and the seat has segments biased outward from one another with a C-ring or other biasing element. Initially, the seat has an expanded state in the sliding sleeve so that the seats segments expand outward against the housing's bore. When an appropriately sized ball is deployed downhole, the ball engages the expanded seat. Fluid pressure applied against the seated ball moves the seat into the inner sleeve's bore. As this occurs, the seat contracts, which increases the engagement area of the seat with the ball. Eventually, the seat reaches the shoulder in the inner sleeve so that pressure applied against the seated ball now moves the inner sleeve in the housing to open the sliding sleeve's flow port.
    • 一个滑动套筒打开,展开的球。 套筒具有设置在壳体中的座部,并且座部具有利用C形环或其它偏置元件彼此向外偏置的部段。 最初,座椅在滑动套筒中具有扩展状态,使得座椅部分向外扩展抵靠壳体的孔。 当适当大小的球部署在井下时,球接合扩展的座椅。 施加在落座球上的流体压力将座椅移动到内套筒的孔中。 发生这种情况时,座位会收缩,从而增加座位与球的接触面积。 最终,座椅到达内部套筒的肩部,使得施加在所承受的球上的压力现在使内部套筒移动到外壳中以打开滑动套筒的流动端口。