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公开(公告)号：US20170248462A1
公开(公告)日：2017-08-31
申请号：US15507111
申请日：2015-08-20
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Veronique Mahue , Tom Parker , Sergey Shatalin
IPC: G01H9/00
Abstract: A prefabricated mat-like structure having lengths of fiber mounted thereon or therein in a predetermined deployment pattern that provides a high spatial density of fiber to give increased spatial sensing resolution is described. The prefabricated mat-like structures may be very easily deployed by being placed against and/or wrapped around an object to be monitored, typically being fastened in place by clamps or the like. In addition, easy removal from the object is also obtained, by simply unfastening the mat-like structure, which may then be redeployed elsewhere. The prefabricated mat-like structure having the fiber already mounted thereon or therein therefore provides a very convenient and easily installable and removable solution
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公开(公告)号：US20170082464A1
公开(公告)日：2017-03-23
申请号：US15368945
申请日：2016-12-05
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Tom Richard Parker , Sergey Shatalin
CPC classification number: G01H9/004 , E21B47/0002 , E21B47/101 , G01D5/35303 , G01D5/35306 , G01D5/35325 , G01D5/35335 , G01D5/35358 , G01D5/35364 , G01D5/35377 , G01D5/35383 , G01F1/66 , G01F1/661 , G01M11/331 , G01V1/40
Abstract: The present invention provides novel apparatus and methods for fast quantitative measurement of perturbation of optical fields transmitted, reflected and/or scattered along a length of an optical fibre. The present invention can be used for point sensors as well as distributed sensors or the combination of both. In particular this technique can be applied to distributed sensors while extending dramatically the speed and sensitivity to allow the detection of acoustic perturbations anywhere along a length of an optical fibre while achieving fine spatial resolution. The present invention offers unique advantages in a broad range of acoustic sensing and imaging applications. Typical uses are for monitoring oil and gas wells such as for distributed flow metering and/or imaging, seismic imaging, monitoring long cables and pipelines, imaging within large vessel as well as for security applications.
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公开(公告)号：US20160258795A1
公开(公告)日：2016-09-08
申请号：US15029480
申请日：2014-10-15
Applicant: SILIXA LTD.
Inventor： Mahmoud Farhadiroushan , Daniel Finfer , Veronique Mahue , Tom Parker , Sergey Shatalin , Dmitry Strusevich
CPC classification number: G01F1/661 , G01D5/3537 , G02B6/4415
Abstract: Embodiments of the present invention provide a cable for optical fiber sensing applications formed from fiber wound around a cable core. A protective layer is then preferably placed over the top of the wound fiber, to protect the fiber, and to help keep it in place on the cable core. The cable core is preferably of a diameter to allow bend-insensitive fiber to be wound thereon with low bending losses. The effect of winding the fiber onto the cable core means that the longitudinal sensing resolution of the resulting cable is higher than simple straight fiber, when the cable is used with an optical fiber sensing system such as a DAS or DTS system. The achieved resolution for the resulting cable is a function of the fiber winding diameter and pitch, with a larger diameter and reduced winding pitch giving a higher longitudinal sensing resolution.
Abstract translation: 本发明的实施例提供了一种用于光纤传感应用的电缆，其由缠绕在电缆芯上的光纤形成。 然后优选将保护层放置在缠绕光纤的顶部上方，以保护光纤，并帮助将其保持在电缆芯上的适当位置。 电缆芯优选具有允许弯曲不敏感纤维以低弯曲损耗缠绕在其上的直径。 将光纤缠绕到电缆芯上的效果意味着当电缆与诸如DAS或DTS系统的光纤传感系统一起使用时，所得电缆的纵向感测分辨率高于简单的直线光纤。 所得到的电缆的分辨率是光纤绕组直径和间距的函数，具有较大的直径和减小的绕组间距，从而提供更高的纵向感测分辨率。
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公开(公告)号：US20150285064A1
公开(公告)日：2015-10-08
申请号：US14440138
申请日：2013-11-01
Applicant: SILIXA LTD.
Inventor： Mahmoud Farhadiroushan , Tom Parker , Daniel Finfer , Veronique Mahue
CPC classification number: E21B47/123 , E21B47/02208 , G01F1/7086 , G01N29/024 , G01N29/46 , G01N2291/02836 , G01N2291/106 , G01P5/241
Abstract: Externally generated noise can be coupled into a fluid carrying structure such as a pipe, well, or borehole so as to artificially acoustically “illuminate” the pipe, well, or borehole, and allow fluid flow in the structure or structural integrity to be determined. In the disclosed system, externally generated noise is coupled into the structure being monitored at the same time as data logging required to undertake the monitoring is performed. This has three effects. First, the externally generated sound is coupled into the structure so as to “illuminate” acoustically the structure to allow data to be collected from which fluid flow may be determined, and secondly the amount of data that need be collected is reduced, as there is no need to log data when the structure is not being illuminated. Thirdly, there are signal processing advantages in having the data logging being undertaken only when the acoustic illumination occurs.
Abstract translation: 外部产生的噪声可以耦合到诸如管道，井或井眼之类的流体承载结构中，以便人为地声学地“照亮”管道，井或钻孔，并且允许确定结构中的流体流动或结构完整性。 在所公开的系统中，在执行进行监视所需的数据记录的同时，将外部产生的噪声耦合到被监视的结构中。 这有三个效果。 首先，外部产生的声音被耦合到结构中以便在声学上“发光”结构以允许从哪个流体流可以被确定的数据被收集，其次可以减少需要收集的数据量，因为 当结构不亮时不需要记录数据。 第三，在仅在声光照射时才进行数据记录的信号处理优点。
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公开(公告)号：US20140022530A1
公开(公告)日：2014-01-23
申请号：US13944469
申请日：2013-07-17
Applicant: Chevron USA Inc. , Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Daniel Finfer , Yousif Kamil , Roy Lester Kutlik
IPC: G01N29/24
CPC classification number: G01N29/2418 , E21B47/0006 , E21B47/091 , G01D5/35383 , G01H9/004 , G01S5/18 , G01S5/186 , G01S5/26 , G01S5/30
Abstract: 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.
Abstract translation: 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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Patent Agency Ranking
公开(公告)号：US20240011823A1
公开(公告)日：2024-01-11
申请号：US18370963
申请日：2023-09-21
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Tom Richard Parker , Sergey Shatalin
CPC classification number: G01D5/35303 , G01D5/35387 , G01D5/36 , G01D5/35364 , G01D5/35329
Abstract: The present invention provides novel apparatus and methods for fast quantitative measurement of perturbation of optical fields transmitted, reflected and/or scattered along a length of an optical fibre. The present invention can be used for point sensors as well as distributed sensors or the combination of both. In particular this technique can be applied to distributed sensors while extending dramatically the speed and sensitivity to allow the detection of acoustic perturbations anywhere along a length of an optical fibre while achieving fine spatial resolution. The present invention offers unique advantages in a broad range of acoustic sensing and imaging applications. Typical uses are for monitoring oil and gas wells such as for distributed flow metering and/or imaging, seismic imaging, monitoring long cables and pipelines, imaging within large vessel as well as for security applications.
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公开(公告)号：US20230221151A1
公开(公告)日：2023-07-13
申请号：US17904599
申请日：2021-02-19
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Tom Parker , Sergey Shatalin , Jack Maxwell
IPC: G01D5/353
CPC classification number: G01D5/35364
Abstract: A long range optical fiber sensor such as a distributed acoustic sensor has a sensing fiber located remotely from the interrogator, with a length of transport fiber path connecting the two. Because no sensing is performed on the transport fiber then the pulse repetition rate from the interrogator can be high enough such that the pulse repetition rate and pulse power are optimised according to the sensing fiber length and hence sensing frequency response and sensitivity are also optimised according to the sensing fiber length.
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公开(公告)号：US10927667B2
公开(公告)日：2021-02-23
申请号：US15877588
申请日：2018-01-23
Applicant: Silixa Ltd. , CHEVRON U.S.A. INC.
Inventor： Mahmoud Farhadiroushan , Tom Parker , Daniel Finfer , Veronique Mahue
IPC: E21B47/135 , G01P5/24 , G01N29/46 , E21B47/0224 , G01F1/708 , G01N29/024
Abstract: Externally generated noise can be coupled into a fluid carrying structure such as a pipe, well, or borehole so as to artificially acoustically “illuminate” the pipe, well, or borehole, and allow fluid flow in the structure or structural integrity to be determined. In the disclosed system, externally generated noise is coupled into the structure being monitored at the same time as data logging required to undertake the monitoring is performed. This has three effects. First, the externally generated sound is coupled into the structure so as to “illuminate” acoustically the structure to allow data to be collected from which fluid flow may be determined, and secondly the amount of data that need be collected is reduced, as there is no need to log data when the structure is not being illuminated. Thirdly, there are signal processing advantages in having the data logging being undertaken only when the acoustic illumination occurs.
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公开(公告)号：US20190331523A1
公开(公告)日：2019-10-31
申请号：US16508522
申请日：2019-07-11
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Tom Richard Parker , Sergey Shatalin
Abstract: The present invention provides novel apparatus and methods for fast quantitative measurement of perturbation of optical fields transmitted, reflected and/or scattered along a length of an optical fibre. The present invention can be used for point sensors as well as distributed sensors or the combination of both. In particular this technique can be applied to distributed sensors while extending dramatically the speed and sensitivity to allow the detection of acoustic perturbations anywhere along a length of an optical fibre while achieving fine spatial resolution. The present invention offers unique advantages in a broad range of acoustic sensing and imaging applications. Typical uses are for monitoring oil and gas wells such as for distributed flow metering and/or imaging, seismic imaging, monitoring long cables and pipelines, imaging within large vessel as well as for security applications.
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公开(公告)号：US10196890B2
公开(公告)日：2019-02-05
申请号：US15830807
申请日：2017-12-04
Applicant: Silixa Ltd.
Inventor： Daniel Finfer , Kjetil Johannessen
Abstract: The invention relates to the use of distributed optical fibre sensors for distributed acoustic sensing, and in particular, modal analysis of distributed acoustic data obtained in-well to monitoring well integrity. By determining one or more acoustic modes corresponding to distributed speed of sound measurements within the wellbore, and analysing variations in the distributed speed of sound measurement it is possible to derive information relating to a formation and/or fluid in the wellbore.
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