公开(公告)号：US20210247250A1

公开(公告)日：2021-08-12

申请号：US17243142

申请日：2021-04-28

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01L1/24 ,  E21B47/135 ,  G02B6/02 ,  F17D5/00 ,  F17C13/02 ,  E21B47/007

Abstract: A system and method for detecting dynamic strain of a housing. The system includes an optical fiber linearly affixed along a surface of a length of the housing and an interrogator comprising a laser source and a photodetector. The optical fiber comprises at least one pair of fiber Bragg gratings (FBGs) tuned to reflect substantially identical wavelengths with a segment of the optical fiber extending between the FBGs. The segment of the optical fiber is linearly affixed along the surface of the housing. The interrogator is configured to perform interferometry by shining laser light along the optical fiber and detecting light reflected by the FBGs. The interrogator outputs dynamic strain measurements based on interferometry performed on the reflected light.

公开(公告)号：US11085758B2

公开(公告)日：2021-08-10

申请号：US16805277

申请日：2020-02-28

Applicant: Hifi Engineering Inc.

Inventor： Seyed Ehsan Jalilian ,  John Hull ,  Daniel Huang ,  Adekunle Adeyemi

IPC: G01B11/16 ,  G01L1/24 ,  G01M3/00 ,  G01M3/24 ,  G01M3/38 ,  G01D5/353 ,  G01K11/3206 ,  G01B21/32 ,  G01H9/00

Abstract: Methods, systems, and techniques for determining whether an event has occurred from dynamic strain measurements involve determining, using a processor, at least one event parameter from a signal representing the dynamic strain measurements, and then having the processor use the at least one event parameter to determine whether the event has occurred. The at least one event parameter is any one or more of a measure of magnitude of the signal, frequency centroid of the signal, filtered baseline of the signal, harmonic power of the signal, and time-integrated spectrum flux of the signal.

公开(公告)号：US20210239516A1

公开(公告)日：2021-08-05

申请号：US17053041

申请日：2019-05-07

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01H9/00 ,  G01L1/24 ,  G02B6/44

Abstract: There is described an optical fiber assembly comprising an optical fiber casing and optical fiber deployed within and fixed relative to the casing at multiple fixation points spaced along the casing. The optical fiber assembly may further comprise one or more weights attached within the casing to the optical fiber, for increasing a tension of the optical fiber between the multiple fixation points. The optical fiber casing may comprise flexible portions and rigid portions, with the optical fiber fixed to the flexible portions.

公开(公告)号：US20200158594A1

公开(公告)日：2020-05-21

申请号：US16625640

申请日：2018-06-29

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian ,  David Westwick

IPC: G01M3/24 ,  G01H9/00

Abstract: Methods, systems, and techniques for determining whether an acoustic event lias occurred along a fluid conduit iliat lias acoustic sensors positioned along its length. For each of the sensors, a processor is used to determine a linear relationship between a measured acoustic signal measured using the sensor and a white noise acoustic source located along a longitudinal segment of the fluid conduit overlapping the sensor. From the linear relationship, the processor determines an acoustic path response that includes an acoustic response of the longitudinal segment and an acoustic source transfer function dial transforms the white noise acoustic source. Over time, variations in the acoustic path responses and/or acoustic source transfer functions are monitored. When the event threshold is exceeded, the acoustic event is identified as having occurred along the longitudinal segment corresponding to the acoustic path response or acoustic source transfer function that varied in excess of the event threshold.

公开(公告)号：US10260937B2

公开(公告)日：2019-04-16

申请号：US15739651

申请日：2016-06-27

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01H9/00 ,  G01D5/26 ,  G01D5/353 ,  G02B6/02

Abstract: Sensor shaped to have a frequency response that has less spectral fading than a sensor with a rectangular wrapping pattern, and methods for making such sensors, are disclosed. One such method includes selecting a wrapping pattern comprising multiple layers in which a top layer has a different length than a bottom layer and where the bottom layer is adjacent a mandrel. The method further includes wrapping optical fiber around the mandrel according to the wrapping pattern.

公开(公告)号：US20180266854A1

公开(公告)日：2018-09-20

申请号：US15532963

申请日：2015-12-04

Applicant: Hifi Engineering Inc.

Inventor： Brian H. Moore ,  Walter Jeffrey Shakespeare ,  Phillip William Wallace ,  Viet Hoang ,  Tom Clement

IPC: G01D5/353 ,  G01D18/00 ,  G01B11/16 ,  G01B9/02

CPC classification number: G01D5/35316 ,  G01B9/02067 ,  G01B11/161 ,  G01B11/18 ,  G01B2290/70 ,  G01D18/00

Abstract: An optical fiber interrogator for interrogating optical fiber that includes fiber Bragg gratings (“FBGs”). The interrogator includes a light source operable to emit phase coherent light, amplitude modulation circuitry optically coupled to the light source and operable to generate pulses from the light, and control circuitry communicatively coupled to the amplitude modulation circuitry that is configured to perform a method for interrogating the optical fiber. The method includes generating a pair of light pulses by using the amplitude modulation circuitry to modulate light output by the light source without splitting the light.

公开(公告)号：US20180164151A1

公开(公告)日：2018-06-14

申请号：US15739651

申请日：2016-06-27

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01H9/00 ,  G01D5/353 ,  G01D5/26

CPC classification number: G01H9/004 ,  G01D5/268 ,  G01D5/35374 ,  G02B6/0208

Abstract: Sensor shaped to have a frequency response that has less spectral fading than a sensor with a rectangular wrapping pattern, and methods for making such sensors, are disclosed. One such method includes selecting a wrapping pattern comprising multiple layers in which a top layer has a different length than a bottom layer and where the bottom layer is adjacent a mandrel. The method further includes wrapping optical fiber around the mandrel according to the wrapping pattern.

公开(公告)号：US20140036627A1

公开(公告)日：2014-02-06

申请号：US13958358

申请日：2013-08-02

Applicant: HiFi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian ,  Philip Cheuk

IPC: G01V1/00 ,  G01S5/18

CPC classification number: G01V1/001 ,  E21B47/101 ,  G01N29/07 ,  G01N29/11 ,  G01N29/14 ,  G01N29/36 ,  G01N29/44 ,  G01N29/4409 ,  G01N29/4454 ,  G01S5/18 ,  G01S5/186 ,  G01V1/288 ,  G01V2210/123 ,  G01V2210/65

Abstract: A method for determining relative location of an acoustic event along a channel such as a wellbore includes obtaining two acoustic signals at are obtained at two different and known depths in the wellbore, dividing the acoustic signals into windows, and determining the relative loudnesses of pairs of the windows. The power of the acoustic signals may be used as a proxy for the loudness of the acoustic event, and this determination can be made in the time or frequency domains. The relative depth of the acoustic event can then be determined relative to the two known depths from the relative loudnesses. The acoustic event may be, for example, casing vent flow, gas migration, a leak along a pipeline, or sounds observed in an observation well from a nearby well in which fracking is being performed.

Abstract translation: 用于确定声学事件沿着诸如井筒的通道的相对位置的方法包括获得在井筒中的两个不同的和已知的深度处获得的两个声信号，将声信号分成窗口，并且确定成对的相对响度 窗户。 声信号的功率可以用作声学事件的响度的代理，并且可以在时域或频域进行该确定。 然后可以相对于相对响度的两个已知深度确定声学事件的相对深度。 声学事件可以是例如套管排气流，气体迁移，沿着管道的泄漏，或者在其中进行压裂的附近井的观测井中观察到的声音。

公开(公告)号：US12078518B2

公开(公告)日：2024-09-03

申请号：US16310375

申请日：2017-06-14

Applicant: Hifi Engineering Inc.

Inventor： Seyed Ehsan Jalilian ,  Dongliang Huang ,  Henry Leung ,  King Fai Ma

IPC: G01F1/66 ,  G01M3/28 ,  G06N3/0455 ,  G06N3/08 ,  G06N20/00

CPC classification number: G01F1/666 ,  G01F1/662 ,  G01M3/2807 ,  G06N3/08 ,  G06N20/00 ,  G06N3/0455

Abstract: There is provided a method of estimating flowrate in a pipeline based on acoustic behaviour of the pipe. First acoustic data is measured from the pipeline. A flowrate of the fluid in the pipeline is then estimated. The estimation is based on the first acoustic data and based on a correlation established between second acoustic data and corresponding flowrate data from an experimental pipeline. The correlation is established by a machine learning process (which may include the use of an artificial neural network, such as an autoencoder). The second acoustic data and corresponding flowrate data are used as inputs to the machine learning process.

公开(公告)号：US11976915B2

公开(公告)日：2024-05-07

申请号：US18073211

申请日：2022-12-01

Applicant: Hifi Engineering Inc.

Inventor： Brian H. Moore ,  Walter Jeffrey Shakespeare ,  Phillip William Wallace ,  Viet Hoang ,  Chris Henrikson ,  Ajay Sandhu ,  Adrian Dumitru ,  Thomas Clement ,  Dongliang Huang ,  Seyed Ehsan Jalilian

IPC: G01B11/16 ,  G01D5/353 ,  G01H9/00 ,  G01K11/3206 ,  G01L1/24

CPC classification number: G01B11/161 ,  G01B11/18 ,  G01D5/35316 ,  G01D5/35383 ,  G01H9/004 ,  G01K11/3206 ,  G01L1/246

Abstract: There is described a method for interrogating optical fiber comprising fiber Bragg gratings (“FBGs”), using an optical fiber interrogator. The method comprises (a) generating an initial light pulse from phase coherent light emitted from a light source, wherein the initial light pulse is generated by modulating the intensity of the light; (b) splitting the initial light pulse into a pair of light pulses; (c) causing one of the light pulses to be delayed relative to the other of the light pulses; (d) transmitting the light pulses along the optical fiber; (e) receiving reflections of the light pulses off the FBGs; and (f) determining whether an optical path length between the FBGs has changed from an interference pattern resulting from the reflections of the light pulses.