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1. 发明申请

WO2015173592A1 METHOD AND SYSTEM FOR DOWNHOLE OBJECT LOCATION AND ORIENTATION DETERMINATION 审中-公开
标题翻译：用于井下物体位置和方位确定的方法和系统
公开(公告)号：WO2015173592A1
公开(公告)日：2015-11-19
申请号：PCT/GB2015/051448
申请日：2015-05-15
申请人： SILIXA LTD.
发明人： MILNE, Craig , FRANKEY, Brian , PARKER, Tom , FARHADIROUSHAN, Mahmoud
IPC分类号： G01V11/00 , G01V1/44 , E21B47/022
CPC分类号： G01V1/46 , E21B43/116 , E21B47/02208 , E21B47/091 , G01D5/14 , G01V1/226 , G01V1/44 , G01V11/002
摘要： Embodiments of the invention provide a downhole device that is intended to be co- located with an optical fiber cable to be found, for example by being fixed together in the same clamp. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the optical fiber the position of the fiber can then be inferred. As explained above, detecting the fiber position is important during perforation operations, so that the fiber is not inadvertently damaged.
摘要翻译：本发明的实施例提供了一种井下装置，其旨在与待发现的光纤缆线共同定位，例如通过在同一夹具中固定在一起。该装置具有能够相对于重力确定其位置取向的加速度计或其它合适的取向确定装置。提供振动器或其他发声器，其输出作为适当的编码和调制声信号的位置取向信息。布置在井下装置附近的光纤分布式声学传感器检测声信号并将其发送回表面，在那里被解调和解码以获得位置取向信息。假设该设备与光纤位于同一位置，则可以推断光纤的位置。如上所述，在穿孔操作期间检测纤维位置是重要的，使得纤维不会被无意地损坏。

2. 发明申请

WO2012063062A2 FIBRE OPTIC MONITORING INSTALLATION, APPARATUS, AND METHOD 审中-公开
标题翻译：光纤监控安装，设备和方法
公开(公告)号：WO2012063062A2
公开(公告)日：2012-05-18
申请号：PCT/GB2011/052176
申请日：2011-11-08
申请人： SILIXA LTD , FARHADIROUSHAN, Mahmoud , TODOROV, Mladen
发明人： FARHADIROUSHAN, Mahmoud , TODOROV, Mladen
IPC分类号： G01K11/32 , G01K1/14 , G01L1/24
CPC分类号： G01N21/01 , G01K1/14 , G01K11/32 , G01M11/086 , Y10T29/49826
摘要： The invention relates to installations for fibre optic monitoring of articles, and apparatus and methods for forming such installations, including a modular system and components for forming a fibre optic monitoring installation. Applications of the invention include the monitoring of vessels, chambers, and fluid conduits in industrial processing plants, and the invention has particular application to monitoring large vessels, for example temperature monitoring of vessels used in catalytic reforming processes. Convenient installation on or removal from the article being monitored is achieved by providing a support structure for the fibre optic length, which presents the fibre optic length in a preconfigured orientation suitable for monitoring the article. In a particular embodiment of the invention, the fibre optic length is disposed on a panel in a plurality of dense spiral patterns.
摘要翻译：本发明涉及用于物品的光纤监视的装置，以及用于形成这种装置的装置和方法，包括用于形成光纤监视装置的模块化系统和部件。本发明的应用包括监测工业加工厂中的容器，室和流体导管，并且本发明特别适用于监测大型容器，例如用于催化重整过程的容器的温度监测。通过提供用于光纤长度的支撑结构来实现正在监视的物品的方便的安装或从被检测的物品移除，其将光纤长度呈现为适于监视物品的预配置取向。在本发明的特定实施例中，光纤长度以多个密集的螺旋图案设置在面板上。

3. 发明申请

WO2016087850A1 RANGE EXTENSION FOR OPTICAL FIBER SENSING SYSTEMS 审中-公开
标题翻译：光纤传感系统范围扩大
公开(公告)号：WO2016087850A1
公开(公告)日：2016-06-09
申请号：PCT/GB2015/053681
申请日：2015-12-02
申请人： SILIXA LTD. , CHEVRON U.S.A. INC.
发明人： PARKER, Tom , FARHADIROUSHAN, Mahmoud , GILLIES, Arran
IPC分类号： G01D5/353 , G01H9/00
CPC分类号： G01D5/35358 , G01D5/353 , G01D5/35338 , G01D5/35354 , G01H9/004 , G01K11/32 , G01M11/3109
摘要： In an optical fiber sensing system of embodiments of the present invention one or more optical fiber amplifiers are provided in series with the sensing fiber in order to increase the power of any sensing pulses being sent in a forward direction along the fiber. Optical circulators are provided either side of the optical amplifier, to allow backscattered light to be routed around the forward path optical amplifier. In some embodiments an optical amplifier may also be provided in the backscatter and/or reflections feedback path, to increase the power of the backscatter. In further embodiments signal conditioning circuitry may be used, such that the forward optical pulse signal is filtered and/or reconstructed so as to be more like the original pulse (i.e. typically with less time spreading) when output by the amplifier. In some embodiments this may be done within the optical domain by the provision of appropriate bandpass filters, or in other embodiments electronically, with an incoming pulse being electronically sampled and then fed to a controller, which then electronically controls an optical amplifier to reproduce a re-conditioned (with respect to amplitude, wavelength and time) pulse for onward transmission along the next length of fiber.
摘要翻译：在本发明实施例的光纤传感系统中，与传感光纤串联提供一个或多个光纤放大器，以便增加沿着光纤在正向发送的任何检测脉冲的功率。光学循环器位于光放大器的两侧，以允许反向散射光围绕前向光路放大器布线。在一些实施例中，还可以在后向散射和/或反射反馈路径中提供光放大器，以增加反向散射的功率。在另外的实施例中，可以使用信号调节电路，使得当由放大器输出时，正向光脉冲信号被滤波和/或重构，以便更像原始脉冲（即通常具有更少的时间扩展）。在一些实施例中，这可以在光域内通过提供适当的带通滤波器或在其它实施例中以电子方式在电子采样中输入的脉冲进行，然后馈送到控制器，然后控制器电子地控制光放大器再现再生（相对于幅度，波长和时间）脉冲，用于沿着光纤的下一个长度的向前传输。

4. 发明申请

WO2015128680A1 SUBMERSIBLE PUMP MONITORING 审中-公开
标题翻译：潜水泵监控
公开(公告)号：WO2015128680A1
公开(公告)日：2015-09-03
申请号：PCT/GB2015/050600
申请日：2015-03-02
申请人： SILIXA LTD.
发明人： CLARKE, Andrew , FINFER, Daniel , MAHUE, Veronique , PARKER, Tom , FARHADIROUSHAN, Mahmoud
IPC分类号： E21B43/12 , E21B47/04 , E21B47/10 , E21B47/12 , G01H9/00
CPC分类号： E21B47/0007 , E21B43/128 , E21B47/042 , E21B47/101 , E21B47/123 , G01F23/2968 , G01H9/004
摘要： In order to address the above noted problems, embodiments of the present invention use distributed acoustic sensing to monitor the fluid level in an ESP activated well so as to monitor the condition and performance of the ESP. Embodiments of the invention use the ESP as an acoustic source in order to monitor the annulus fluid level within the well, and also to monitor the frequency of the ESP. Additionally, embodiments of the present invention may use distributed acoustic sensing to monitor the flow rates of the production fluid above and below the ESP to determine the pump's efficiency. In particular, some embodiments utilise one or more optical fibers to measure the acoustic waves generated by the ESP, wherein the fiber cabling has already been deployed along the length of the well. As such, the present invention is a non-invasive, in-situ method for monitoring the condition and performance of an ESP.
摘要翻译：为了解决上述问题，本发明的实施例使用分布式声学感测来监测ESP激活的井中的液位，以便监测ESP的状况和性能。本发明的实施例使用ESP作为声源，以便监测井内的环流体水平，并且还监测ESP的频率。此外，本发明的实施例可以使用分布式声学感测来监测ESP上方和下方的生产流体的流量，以确定泵的效率。特别地，一些实施例利用一根或多根光纤来测量由ESP产生的声波，其中光纤布线已沿着该孔的长度展开。因此，本发明是用于监测ESP的状况和性能的非侵入式原位方法。

5. 发明申请

WO2010136809A2 OPTICAL SENSOR AND METHOD OF USE 审中-公开
标题翻译：光传感器及其使用方法
公开(公告)号：WO2010136809A2
公开(公告)日：2010-12-02
申请号：PCT/GB2010050888
申请日：2010-05-27
申请人： SILIXA LTD , FARHADIROUSHAN MAHMOUD , PARKER TOM RICHARD , SHATALIN SERGEY
发明人： FARHADIROUSHAN MAHMOUD , PARKER TOM RICHARD , SHATALIN SERGEY
IPC分类号： G01D5/353
CPC分类号： G01H9/004 , E21B47/0002 , E21B47/101 , G01D5/35303 , G01D5/35306 , G01D5/35325 , G01D5/35335 , G01D5/35358 , G01D5/35377 , G01D5/35383 , G01F1/66 , G01F1/661 , G01M11/331 , G01V1/40
摘要： An interferometer apparatus for an optical fibre system and method of use is described. The interferometer comprises an optical coupler and optical fibres which define first and second optical paths. Light propagating in the first and second optical paths is refelected back to the optical coupler to generate an interference signal. First, second and third interference signal components are directed towards respective first, second and third photodetectors. The third photodetector is connected to the coupler via a non-reciprocal optical device and is configured to measure the intensity of the third interference signal component directed back towards the input fibre. Methods of use in applications to monitoring acoustic perturbations and a calibration method are described.
摘要翻译：描述了一种用于光纤系统的干涉仪装置及其使用方法。干涉仪包括光耦合器和限定第一和第二光路的光纤。在第一和第二光路中传播的光被重新选择回光耦合器以产生干涉信号。首先，第二和第三干扰信号分量指向相应的第一，第二和第三光电探测器。第三光电检测器通过不可逆的光学装置连接到耦合器，并被配置成测量指向输入光纤的第三干涉信号分量的强度。描述了用于监测声学扰动的应用的方法和校准方法。

6. 发明申请

WO2017064472A1 METHOD AND SYSTEM FOR DOWNHOLE OBJECT LOCATION AND ORIENTATION DETERMINATION 审中-公开
标题翻译：用于井下目标定位和定向确定的方法和系统
公开(公告)号：WO2017064472A1
公开(公告)日：2017-04-20
申请号：PCT/GB2016/053094
申请日：2016-10-05
申请人： SILIXA LTD.
发明人： MILNE, Craig
IPC分类号： E21B43/117 , E21B47/01 , E21B47/024 , E21B47/09
CPC分类号： E21B43/117 , E21B47/011 , E21B47/024 , E21B47/0905
摘要： Embodiments of the invention provide a downhole device that is intended to be co-located with a perforarating gun string to allow the rotational orientation thereof when deployed downhols to be determined. The device has an accelerometer or other suitable orientation determining means that is able to determine its positional orientation, with respect to gravity. A vibrator or other sounder is provided, that outputs the positional orientation information as a suitable encoded and modulated acoustic signal. A fiber optic distributed acoustic sensor deployed in the vicinity of the downhole device detects the acoustic signal and transmits it back to the surface, where it is demodulated and decoded to obtain the positional orientation information. Given that the device is co-located with the perforating gun the position of the gun can then be inferred.
摘要翻译：本发明的实施例提供了井下装置，该井下装置旨在与穿孔枪串共置，以允许确定展开时的旋转取向。该装置具有加速度计或其他合适的取向确定装置，其能够相对于重力确定其位置取向。提供振动器或其他发声器，其输出位置方向信息作为合适的编码和调制的声学信号。部署在井下装置附近的光纤分布式声学传感器检测声学信号并将其传输回到表面，在那里对其进行解调和解码以获得位置方向信息。鉴于该设备与射孔枪位于同一位置，就可以推断枪的位置。

7. 发明申请

WO2016142695A1 METHOD AND APPARATUS FOR OPTICAL SENSING 审中-公开
标题翻译：光学感测方法与装置
公开(公告)号：WO2016142695A1
公开(公告)日：2016-09-15
申请号：PCT/GB2016/050625
申请日：2016-03-07
申请人： SILIXA LTD.
发明人： FARHADIROUSHAN, Mahmoud , PARKER, Tom , SHATALIN, Sergey
IPC分类号： G01D5/353 , G01H9/00
CPC分类号： G01D5/35374 , G01D5/35306 , G01D5/3537 , G01H9/004
摘要： Embodiments of the invention provide an improved optical fiber distributed acoustic sensor system that makes use of a specially designed optical fiber to improve overall sensitivity of the system, in some embodiments by a factor in excess of 10. This is achieved by inserting into the fiber weak broadband reflectors periodically along the fiber. The reflectors reflect only a small proportion of the light from the DAS incident thereon back along the fiber, typically in the region of 0.001% to 0.1%, but preferably around 0.01% reflectivity per reflector. In addition, to allow for temperate compensation to ensure that the same reflectivity is obtained if the temperature changes, the reflection bandwidth is relatively broadband i.e. in the region of +/- 3nm from the nominal laser wavelength. In some embodiments the reflectors are formed from a series of fiber Bragg gratings, each with a different center reflecting frequency, the reflecting frequencies and bandwidths of the gratings being selected to provide the broadband reflection. In other embodiments a chirped grating may also be used to provide the same effect. In preferred embodiments, the reflectors are spaced at half the gauge length i.e. the desired spatial resolution of the optical fiber DAS.
摘要翻译：本发明的实施例提供了一种改进的光纤分布式声学传感器系统，其利用专门设计的光纤来改善系统的总体灵敏度，在一些实施例中是超过10倍。这是通过将光纤插入到弱纤维宽带反射器周期性地沿着光纤。反射镜仅反射沿着光纤在其上反射的DAS的光的一小部分，通常在每个反射器的0.001％至0.1％的范围内，优选地为约0.01％的反射率。此外，为了允许温和补偿以确保如果温度改变，获得相同的反射率，则反射带宽相对较宽，即距离标称激光波长+/- 3nm的区域。在一些实施例中，反射器由一系列光纤布拉格光栅形成，每个具有不同的中心反射频率，选择光栅的反射频率和带宽以提供宽带反射。在其他实施例中，也可以使用啁啾光栅来提供相同的效果。在优选实施例中，反射器间隔开量程长度的一半，即光纤DAS的期望空间分辨率。

8. 发明申请

WO2015114367A2 METHOD AND SYSTEM FOR DETERMINING DOWNHOLE OPTICAL FIBER ORIENTATION AND/OR LOCATION 审中-公开
标题翻译：用于确定井下光纤定向和/或位置的方法和系统
公开(公告)号：WO2015114367A2
公开(公告)日：2015-08-06
申请号：PCT/GB2015/050242
申请日：2015-01-30
申请人： SILIXA LTD.
发明人： FARHADIROUSHAN, Mahmoud , PARKER, Tom
IPC分类号： G01V11/00
CPC分类号： G01V11/005 , G01N21/64 , G01N21/68
摘要： A probe is provided that contacts the inner surface of the casing or other production tubing and imparts energy to the surface at the contact point, for example as heat energy, or mechanical (vibrational or acoustic) energy. Energy is imparted around the circumference of the casing or other tubing, and a fiber optic distributed sensor located on the outer surface of the casing or other tubing is used to measure and record the energy that it receives whilst the probe is moved to impart energy around the circumference. A record of energy versus position of the probe around the circumference can be obtained, from which maxima in the detected energy measurements can then be found. The position around the circumference which gave the maximum measurement should be the position at which the optical fiber of the fiber optic distributed sensor is located. In addition, an ultrasonic arrangement is also described, that relies on ultrasonic sound to provide detection.
摘要翻译：提供探针，其接触外壳或其他生产管道的内表面，并且在接触点处将能量赋予表面，例如作为热能或机械（振动或声学）能量。能量被传递到套管或其他管的周围，并且位于套管或其他管的外表面上的光纤分布式传感器被用于测量和记录它在探针移动时给予的能量以传递能量周长。可以获得探针周围能量与位置的关系记录，然后可以找到探测到的能量测量值中的最大值。给出最大测量值的圆周周围的位置应该是光纤分布式传感器的光纤所在的位置。另外，还描述了超声波布置，其依靠超声波来提供检测。

9. 发明申请

WO2015036735A1 NON-ISOTROPIC ACOUSTIC CABLE 审中-公开
标题翻译：非等级声学电缆
公开(公告)号：WO2015036735A1
公开(公告)日：2015-03-19
申请号：PCT/GB2014/052679
申请日：2014-09-04
申请人： SILIXA LTD.
发明人： FARHADIROUSHAN, Mahmoud , FINFER, Daniel , STRUSEVICH, Dmitry , SHATALIN, Sergey , PARKER, Tom
IPC分类号： G01H9/00 , E21B47/12 , G01D5/353 , G01L1/24
CPC分类号： G01H9/004 , G01L1/242 , G01M7/00 , G02B6/4405 , G02B6/4415
摘要： Embodiments of the present invention address aliasing problems by providing a plurality of discrete acoustic sensors along a cable whereby acoustic signals may be measured in situations where the fibre optic cable has not been secured to a structure or area by a series of clamps, as described in the prior art. Acoustic sampling points are achieved by selectively enhancing the acoustic coupling between the outer layer and the at least one optical fibre arrangement, such that acoustic energy may be transmitted selectively from the outer layer to the at least one optical fibre arrangement. The resulting regions of acoustic coupling along the cable allow the optical fibre to detect acoustic signals. Regions between the outer layer and the at least one optical fibre arrangement that contain material which is acoustically insulating further this enhancement since acoustic waves are unable to travel through such mediums, or at least travel through such mediums at a reduced rate.
摘要翻译：本发明的实施例通过沿着电缆提供多个离散的声学传感器来解决混叠问题，从而可以在光纤电缆未通过一系列夹具固定到结构或区域的情况下测量声信号，如现有技术通过选择性地增强外层和至少一个光纤布置之间的声耦合来实现声学采样点，使得声能可以从外层选择性地传输到至少一个光纤装置。所产生的沿着电缆的声耦合区域允许光纤检测声信号。外层和至少一个光纤布置之间的区域包含进一步声学绝缘的材料，因为声波不能穿过这种介质，或至少以降低的速率行进通过这种介质。

10. 发明申请

WO2014013244A3 STRUCTURE MONITORING 审中-公开
标题翻译：结构监测
公开(公告)号：WO2014013244A3
公开(公告)日：2014-03-27
申请号：PCT/GB2013051903
申请日：2013-07-16
申请人： SILIXA LTD , CHEVRON USA INC
发明人： FARHADIROUSHAN MAHMOUD , FINFER DANIEL , KAMIL YOUSIF , KUTLIK ROY LESTER
IPC分类号： G01S5/18 , E21B17/01 , G01D5/353
CPC分类号： G01N29/2418 , E21B47/0006 , E21B47/091 , G01D5/35383 , G01H9/004 , G01S5/18 , G01S5/186 , G01S5/26 , G01S5/30
摘要： A method and apparatus for monitoring a structure using an optical fiber based distributed acoustic sensor (DAS) extending along the length of the structure. The DAS is able to resolve a separate acoustic signal with a spatial resolution of 1 m along the length of the fibre, and hence is able to operate with an acoustic positioning system to determine the position of the riser with the same spatial resolution. In addition, the fiber can at the same time also detect much lower frequency mechanical vibrations in the riser, for example such as resonant mode vibrations induced by movement in the surrounding medium. By using vibration detection in combination with acoustic positioning then overall structure shape monitoring can be undertaken, which is useful for vortex induced vibration (VIV) visualisation, fatigue analysis, and a variety of other advanced purposes. The structure may be a sub-sea riser.
摘要翻译：一种用于使用沿着结构的长度延伸的基于光纤的分布式声学传感器（DAS）来监视结构的方法和装置。 DAS能够沿着光纤的长度解析出具有1m空间分辨率的单独的声信号，因此能够利用声学定位系统来操作，以确定具有相同空间分辨率的提升器的位置。此外，光纤同时也可以检测提升管中的低频机械振动，例如诸如周围介质中的运动引起的共振模式振动。通过使用振动检测与声学定位结合，可以进行整体结构形状监测，这对于涡流诱发振动（VIV）可视化，疲劳分析和各种其他先进目的是有用的。该结构可以是海底立管。

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