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公开(公告)号：US20210072190A1
公开(公告)日：2021-03-11
申请号：US17102221
申请日：2020-11-23
Applicant: Silixa Ltd , Chevron U.S.A. Inc.
Inventor： Mohammad Amir , Mahmoud Farhadiroushan , Daniel Finfer , Veronique Mahue , Tom Parker
Abstract: 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.
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公开(公告)号：US10677642B2
公开(公告)日：2020-06-09
申请号：US15507111
申请日：2015-08-20
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Veronique Mahue , Tom Parker , Sergey Shatalin
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：US10444392B2
公开(公告)日：2019-10-15
申请号：US15311425
申请日：2015-05-15
Applicant: Silixa Ltd.
Inventor： Craig Milne , Brian Frankey , Tom Parker , Mahmoud Farhadiroushan
IPC: G01V1/00 , G01V1/46 , E21B47/022 , G01V1/44 , G01V11/00 , E21B47/09 , G01D5/14 , G01V1/22 , E21B43/116
Abstract: A downhole device is provided 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.
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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：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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Patent Agency Ranking
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：US11022467B2
公开(公告)日：2021-06-01
申请号：US16474747
申请日：2018-01-05
Applicant: Silixa Ltd. , Chevron U.S.A. Inc.
Inventor： Sergey Shatalin , Julian Dajczgewand , Mahmoud Farhadiroushan , Tom Parker
Abstract: An improved optical fiber distributed acoustic sensor system uses an optical fiber having reflector portions distributed along its length in at least a first portion. The reflector portions are positioned along the fiber separated by a distance that is equivalent to twice the distance an optical pulse travels along the fiber in a single sampling period of the data acquisition opto-electronics within the sensor system. No oversampling of the reflections of the optical pulses from the reflector portions is undertaken. The sampling points for data acquisition in the sensor system are aligned with the reflections that arrive at the sensor system from along the sensing fiber. Adaptive delay componentry adaptively aligns the reflected optical signals (or their electrical analogues) with the sampling points. Control over the sampling points can re-synchronise the sampling points with the returning reflections. Reflection equalisation componentry may reduce the dynamic range of the returning reflections.
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公开(公告)号：US10704932B2
公开(公告)日：2020-07-07
申请号：US15532812
申请日：2015-12-02
Applicant: Silixa Ltd. , Chevron U.S.A. Inc.
Inventor： Tom Parker , Mahmoud Farhadiroushan , Arran Gillies
Abstract: An optical fiber sensing system includes a sensing optical fiber and one or more optical amplifiers in series with the sensing fiber and arranged to increase the power of sensing pulses travelling along the fiber to thereby increase the range of the sensing system. The optical fiber sensing system is one selected from the group including an optical fiber distributed acoustic sensor (DAS), an optical fiber distributed temperature sensor (DTS), or an optical time domain reflectometry (OTDR) system.
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公开(公告)号：US10345139B2
公开(公告)日：2019-07-09
申请号：US15804657
申请日：2017-11-06
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Daniel Finfer , Dmitry Strusevich , Sergey Shatalin , Tom Parker
Abstract: 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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公开(公告)号：US20180149017A1
公开(公告)日：2018-05-31
申请号：US15877588
申请日：2018-01-23
Applicant: Silixa Ltd.
Inventor： Mahmoud Farhadiroushan , Tom Parker , Daniel Finfer , Veronique Mahue
IPC: E21B47/12 , G01N29/024 , E21B47/022 , G01F1/708 , G01N29/46 , G01P5/24
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.
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