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1. 发明申请

US20140022530A1 STRUCTURE MONITORING 审中-公开
标题翻译：结构监测
公开(公告)号：US20140022530A1
公开(公告)日：2014-01-23
申请号：US13944469
申请日：2013-07-17
申请人： Chevron USA Inc. , Silixa Ltd.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Yousif Kamil , Roy Lester Kutlik
IPC分类号： G01N29/24
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。

2. 发明授权

US11656204B2 Structure monitoring 有权
公开(公告)号：US11656204B2
公开(公告)日：2023-05-23
申请号：US13944407
申请日：2013-07-17
申请人： Silixa Ltd. , Chevron USA Inc.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Yousif Kamil , Roy Lester Kutlik
IPC分类号： G01N29/24 , G01H9/00 , G01S5/18 , G01S5/26 , G01S5/30 , E21B47/007 , E21B47/095 , G01D5/353
CPC分类号： G01N29/2418 , E21B47/007 , E21B47/095 , G01H9/004 , G01S5/18 , G01S5/186 , G01S5/26 , G01S5/30 , G01D5/35383
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.

3. 发明授权

US10145821B2 Structure monitoring 有权
公开(公告)号：US10145821B2
公开(公告)日：2018-12-04
申请号：US13944469
申请日：2013-07-17
申请人： Silixa Ltd. , Chevron USA Inc.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Yousif Kamil , Roy Lester Kutlik
IPC分类号： G01N29/24 , G01S5/18 , E21B47/00 , E21B47/09 , G01H9/00 , G01S5/26 , G01S5/30 , G01D5/353
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.

4. 发明授权

US10451462B2 Optical fiber cable 有权
公开(公告)号：US10451462B2
公开(公告)日：2019-10-22
申请号：US15962196
申请日：2018-04-25
申请人： SILIXA LTD. , CHEVRON USA INC.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Veronique Mahue , Tom Parker , Sergey Shatalin , Dmitry Strusevich
IPC分类号： G01F1/66 , G02B6/44 , G01D5/353
摘要： 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.

5. 发明申请

US20140025319A1 STRUCTURE MONITORING 审中-公开
公开(公告)号：US20140025319A1
公开(公告)日：2014-01-23
申请号：US13944407
申请日：2013-07-17
申请人： Chevron USA Inc. , Silixa Ltd.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Yousif Kamil , Roy Lester Kutlik
IPC分类号： G01N29/24
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.

6. 发明申请

US20180245957A1 OPTICAL FIBER CABLE 审中-公开
公开(公告)号：US20180245957A1
公开(公告)日：2018-08-30
申请号：US15962196
申请日：2018-04-25
申请人： SILIXA LTD. , CHEVRON USA INC.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Veronique Mahue , Tom Parker , Sergey Shatalin , Dmitry Strusevich
IPC分类号： G01F1/66 , G02B6/44 , G01D5/353
摘要： 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.

7. 发明申请

US20210072190A1 Multi-Phase Flow-Monitoring with an Optical Fiber Distributed Acoustic Sensor 有权
公开(公告)号：US20210072190A1
公开(公告)日：2021-03-11
申请号：US17102221
申请日：2020-11-23
申请人： Silixa Ltd , Chevron U.S.A. Inc.
发明人： Mohammad Amir , Mahmoud Farhadiroushan , Daniel Finfer , Veronique Mahue , Tom Parker
IPC分类号： G01N29/024 , G01N29/24 , G01F1/66 , G01N29/46 , G01F1/74 , G01F1/708
摘要： Embodiments of the invention provide a “tool-kit” of processing techniques which can be employed in different combinations depending on the circumstances. For example, flow speed can be found using eddy tracking techniques, or by using speed of sound measurements. Moreover, composition can be found by using speed of sound measurements and also by looking for turning points in the k-w curves, particularly in stratified multi-phase flows. Different combinations of the embodiments can therefore be put together to provide further embodiments, to meet particular flow sensing requirements, both on the surface and downhole. Once the flow speed is known, then at least in the case of a single phase flow, the flow speed can be multiplied by the interior cross-sectional area of the pipe to obtain the flow rate. The mass flow rate can then be obtained if the density of the fluid is known, once the composition has been determined.

8. 发明申请

US20160258795A1 OPTICAL FIBER CABLE 有权
标题翻译：光纤电缆
公开(公告)号：US20160258795A1
公开(公告)日：2016-09-08
申请号：US15029480
申请日：2014-10-15
申请人： SILIXA LTD.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Veronique Mahue , Tom Parker , Sergey Shatalin , Dmitry Strusevich
IPC分类号： G01F1/66 , G02B6/44
CPC分类号： G01F1/661 , G01D5/3537 , G02B6/4415
摘要： 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.
摘要翻译：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。

9. 发明申请

US20150285064A1 ACOUSTIC ILLUMINATION FOR FLOW-MONITORING 有权
标题翻译：用于流量监测的声学照明
公开(公告)号：US20150285064A1
公开(公告)日：2015-10-08
申请号：US14440138
申请日：2013-11-01
申请人： SILIXA LTD.
发明人： Mahmoud Farhadiroushan , Tom Parker , Daniel Finfer , Veronique Mahue
IPC分类号： E21B47/12 , G01F1/708
CPC分类号： E21B47/123 , E21B47/02208 , G01F1/7086 , G01N29/024 , G01N29/46 , G01N2291/02836 , G01N2291/106 , G01P5/241
摘要： 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.
摘要翻译：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。

10. 发明授权

US10345139B2 Non-isotropic acoustic cable 有权
公开(公告)号：US10345139B2
公开(公告)日：2019-07-09
申请号：US15804657
申请日：2017-11-06
申请人： Silixa Ltd.
发明人： Mahmoud Farhadiroushan , Daniel Finfer , Dmitry Strusevich , Sergey Shatalin , Tom Parker
IPC分类号： G01H9/00 , G01L1/24 , G01M7/00 , G02B6/44
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 fiber optic cable has not been secured to a structure or area by a series of clamps. Acoustic sampling points are achieved by selectively enhancing the acoustic coupling between the outer layer and the at least one optical fiber arrangement, such that acoustic energy may be transmitted selectively from the outer layer to the at least one optical fiber arrangement. The resulting regions of acoustic coupling along the cable allow the optical fiber to detect acoustic signals. Regions between the outer layer and the at least one optical fiber 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.

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