公开(公告)号：US20190212212A1

公开(公告)日：2019-07-11

申请号：US16358066

申请日：2019-03-19

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01K11/32 ,  G01N25/16 ,  G01H9/00 ,  G01K1/20 ,  G01B11/16

CPC classification number: G01K11/32 ,  G01B11/161 ,  G01H9/004 ,  G01K1/20 ,  G01N21/45 ,  G01N25/16

Abstract: Described are methods and systems using optical fiber interferometry to sense interference causing events in a region of interest and differentiate between a strain event and a thermal event. Other methods and systems relate to the use of optical fiber interferometry for determining temperature offset in a region of interest and using the determined temperature offset for determining temperature in the region of interest.

公开(公告)号：US20190137045A1

公开(公告)日：2019-05-09

申请号：US16024513

申请日：2018-06-29

Applicant: Hifi Engineering Inc.

Inventor： Seyed Ehsan Jalilian ,  Arne Dankers ,  David Westwick

IPC: F17D5/06 ,  E21B47/12 ,  E21B47/10 ,  G01H9/00 ,  G01M3/24 ,  G01N29/14

Abstract: Methods, systems, and techniques for determining whether an acoustic event has occurred along a fluid conduit having acoustic sensors positioned therealong. The method uses a processor to, for each of the sensors, determine a predicted acoustic signal using one or more past acoustic signals measured prior to measuring a measured acoustic signal using the sensor; determine a prediction error between the measured acoustic signal and the predicted acoustic signal; from the prediction error, determine a power estimate of an acoustic source located along a longitudinal segment of the fluid conduit overlapping the sensor; and determine whether the power estimate of the acoustic source exceeds an event threshold for the sensor. When the power estimate of at least one of the acoustic sources exceeds the event threshold, the processor attributes the acoustic event to one of the sensors for which the power estimate of the acoustic source exceeds the event threshold.

公开(公告)号：US20180356210A1

公开(公告)日：2018-12-13

申请号：US15868766

申请日：2018-01-11

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 ,  G01K11/32 ,  G01H9/00 ,  G01L1/24

CPC classification number: G01B11/161 ,  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.

公开(公告)号：US09606250B2

公开(公告)日：2017-03-28

申请号：US13958358

申请日：2013-08-02

Applicant: HiFi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian ,  Philip Cheuk

IPC: G01N29/07 ,  G01N29/11 ,  G01N29/14 ,  G01V1/00 ,  G01S5/18 ,  G01N29/36 ,  E21B47/10 ,  G01V1/28 ,  G01N29/44

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.

公开(公告)号：US20160312604A1

公开(公告)日：2016-10-27

申请号：US15105386

申请日：2014-12-15

Applicant: HIFI ENGINEERING INC.

Inventor： John Hull ,  Neil Gulewicz ,  Seyed Ehsan Jalilian

IPC: E21B47/10 ,  G10K11/00 ,  E21B41/00

CPC classification number: E21B47/101 ,  E21B41/00 ,  G10K11/002

Abstract: A sound baffle device for use with an acoustic sensor deployed in a housing by a deployment line is disclosed. The sound baffle device comprises a radially extending baffle plate and an affixing mechanism for affixing the baffle plate to the deployment line. The baffle plate is configured to reduce acoustic transmission between a first zone of the housing on one side of the baffle plate and a second zone of the housing on an opposite side of the baffle plate. A system for detecting acoustic signals in a zone of interest in a housing is also disclosed. The system comprises an acoustic sensor positioned in the zone of interest and one or more than one sound baffle positioned between the zone of interest and a first zone of the housing. The sound baffle is configured to reduce acoustic transmission from the first zone to the zone of interest. The sound baffle provides some level of acoustic isolation between two zones on either side of the baffle plate thereby aiding detection and identification of acoustic signals in the zone of interest by reducing transmission of acoustic signals from the first zone to the zone of interest.

Abstract translation: 公开了一种用于通过部署线路部署在壳体中的声学传感器使用的隔音装置。 隔音装置包括径向延伸的挡板和用于将挡板固定到展开线的固定机构。 所述挡板被构造成减小所述挡板的一侧上的所述壳体的第一区域与所述挡板相对侧上的所述壳体的第二区域之间的声传播。 还公开了一种用于检测壳体中感兴趣区域中的声信号的系统。 该系统包括位于感兴趣区域中的声学传感器和位于感兴趣区域和壳体的第一区域之间的一个或多个声音挡板。 声音挡板被配置为减少从第一区域到感兴趣区域的声学传播。 隔音板在挡板两侧的两个区域之间提供一定程度的声学隔离，从而通过减少从第一区域到感兴趣区域的声信号的传输来帮助检测和识别感兴趣区域中的声信号。

公开(公告)号：US12253204B2

公开(公告)日：2025-03-18

申请号：US18054496

申请日：2022-11-10

Applicant: HIFI ENGINEERING INC.

Inventor： Seyed Ehsan Jalilian ,  Mehri Owjimehr

IPC: F16L55/48 ,  G01H9/00 ,  G01S11/14

Abstract: An object moving along a conduit having multiple channels is tracked. Each channel defines a portion of a length of the conduit. For each channel, acoustic data, generated from one or more acoustic signals detected at the channel in response to movement of the object along the conduit, is generated. For at least one channel, the acoustic data obtained for the at least one channel is cross-correlated with the acoustic data obtained for at least one other one of the channels. Based on the cross-correlating, a position of the object within the conduit is determined.

公开(公告)号：US11953385B2

公开(公告)日：2024-04-09

申请号：US17299304

申请日：2019-12-02

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01B11/00 ,  G01B11/16 ,  G01D5/353 ,  G01D18/00 ,  G01K11/32 ,  G01K15/00

CPC classification number: G01K15/007 ,  G01B11/16 ,  G01D5/35309 ,  G01D18/00 ,  G01K11/32

Abstract: An apparatus includes an enclosure having one or more apertures for receiving therethrough optical fiber, and one or more actuators sealed within the enclosure for generating one or more interference signals for interfering with optical fiber within the enclosure such that an optical path length of the optical fiber is altered. A method for verifying an event detection system includes interrogating optical fiber positioned alongside a conduit by sending one or more light pulses along the optical fiber and receiving reflections of the one or more light pulses. The method further includes using an event verification device housed within an enclosure through which passes the optical fiber to generate one or more interference signals for interfering with the optical fiber such that an optical path length of the optical fiber is altered.

公开(公告)号：US11946732B2

公开(公告)日：2024-04-02

申请号：US17429220

申请日：2020-02-05

Applicant: Hifi Engineering Inc.

Inventor： Arne Dankers ,  Seyed Ehsan Jalilian

IPC: G01B11/16 ,  E21B47/01 ,  B65H59/40 ,  E21B47/113 ,  F17D5/06

CPC classification number: G01B11/165 ,  E21B47/01 ,  B65H59/40 ,  B65H2701/32 ,  E21B47/114 ,  F17D5/06

Abstract: A method of wrapping optical fiber around a fluid conduit. The optical fiber is wrapped at least partially around the conduit. The optical fiber is secured relative to the conduit at one or more securing locations, thereby defining a sequence of multiple optical fiber portions. Each optical fiber portion comprises a portion of the optical fiber. Each securing location delimits a given optical fiber portion from the subsequent optical fiber portion in the sequence of optical fiber portions. A direction of wrapping of each consecutive optical fiber portion in the sequence of optical fiber portions may be alternated between a clockwise direction and a counter-clockwise direction.

公开(公告)号：US20240003765A1

公开(公告)日：2024-01-04

申请号：US18188967

申请日：2023-03-23

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

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

CPC classification number: G01L1/246 ,  F17C13/02 ,  F17D5/00 ,  E21B47/007 ,  E21B47/135 ,  G02B6/02 ,  G02B6/0208 ,  G02B6/02395

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：US11630008B2

公开(公告)日：2023-04-18

申请号：US17243142

申请日：2021-04-28

Applicant: Hifi Engineering Inc.

Inventor： John Hull ,  Seyed Ehsan Jalilian

IPC: G01B9/02 ,  G01L1/24 ,  F17C13/02 ,  F17D5/00 ,  E21B47/007 ,  E21B47/135 ,  G02B6/02

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.