WO2002044656A2 - Apparatus for protecting sensing devices - Google Patents

Apparatus for protecting sensing devices Download PDF

Info

Publication number
WO2002044656A2
WO2002044656A2 PCT/GB2001/005286 GB0105286W WO0244656A2 WO 2002044656 A2 WO2002044656 A2 WO 2002044656A2 GB 0105286 W GB0105286 W GB 0105286W WO 0244656 A2 WO0244656 A2 WO 0244656A2
Authority
WO
WIPO (PCT)
Prior art keywords
isolation pad
conduit
pipe
sensor
optical reflective
Prior art date
Application number
PCT/GB2001/005286
Other languages
French (fr)
Other versions
WO2002044656A3 (en
Inventor
Richard T. Jones
Allen Davis
John M. Faustino
Original Assignee
Weatherford/Lamb, Inc.
Harding, Richard, Patrick
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Weatherford/Lamb, Inc., Harding, Richard, Patrick filed Critical Weatherford/Lamb, Inc.
Priority to AU2002223096A priority Critical patent/AU2002223096A1/en
Priority to EP01998791A priority patent/EP1344026B1/en
Priority to CA002428584A priority patent/CA2428584C/en
Publication of WO2002044656A2 publication Critical patent/WO2002044656A2/en
Publication of WO2002044656A3 publication Critical patent/WO2002044656A3/en
Priority to NO20032076A priority patent/NO335275B1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/666—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by detecting noise and sounds generated by the flowing fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/35306—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
    • G01D5/35309—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
    • G01D5/35316—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
    • G01D5/35374—Particular layout of the fiber

Definitions

  • This invention relates to fluid flow sensing devices that use fiber optics and more particularly to those sensing devices that are disposed on the exterior of a conduit.
  • an object of the present invention to provide an apparatus for protecting flow sensing devices that are disposed on the exterior of a pipe, and one that can protect sensing devices in a hostile environment.
  • an apparatus for non-intrusively sensing fluid flow within a pipe includes an array of sensors that include a plurality of optical fiber coils.
  • the array of sensors senses the fluid flow inside the pipe.
  • At least one optical reflective device is disposed between adjacent optical fiber coils.
  • An isolation pad is disposed between each optical reflective device and the pipe.
  • An advantage of the present invention is that it enables the collection of data pertaining to fluid flow within a pipe in a non-intrusive manner.
  • An externally mounted sensor for non-intrusively sensing fluid flow within the pipe can be subjected to pipe growth and/or vibrations.
  • the isolation pad isolates the optical reflective device, and splices if used, from thermally or mechanically related pipe growth and/or vibrations. Error or damage that might otherwise be caused by the pipe growth and/or vibrations is thereby decreased to an acceptable level.
  • the isolation pad may be used directly under a sensor to protect the sensor.
  • the present apparatus is also protected from the environment by a compactly formed housing that encloses the array of sensors and the isolation pad.
  • the housing protects the array from fluid and debris that may enter the annulus between the production pipe and the well casing.
  • Figure 1 is a diagrammatic view of the present invention apparatus for non- intrusively sensing fluid flow within a pipe
  • Figure 2 is a diagrammatic sectional view to illustrate the arrangement of components within the present invention apparatus.
  • an apparatus 10 for non-intrusively sensing fluid flow within a pipe 12 includes an array of sensors 14 that includes a plurality of optical fiber coils 16 and one or more optical reflective devices 18, and one or more isolation pads 20.
  • Each optical fiber coil 16 is wrapped multiple turns around the circumference of the pipe 12 in a manner that allows the length of the optical fiber within the coil 16 to change in response to a change in the circumference of the pipe 12.
  • the optical fiber coil 16 is not wrapped around the circumference of the pipe 12, but rather arranged on the outer surface of the pipe 12.
  • the optical fiber coils 16 may be attached to the pipe 12 by a variety of attachment mechanisms including, but not limited to, adhesive, glue, epoxy, or tape.
  • the one or more optical reflective devices 18 disposed between coils 16 are wavelength tunable. Each optical reflective device is disposed in-line within an optical fiber extending between adjacent coils. Depending on the type of optical reflective device 18, it may be formed integrally with the optical fiber or spliced into the optical fiber.
  • the optical reflective devices 18 are fiber Bragg Gratings (FBG's).
  • FBG fiber Bragg Gratings
  • a FBG reflects a predetermined wavelength band of light having a central peak reflection wavelength ( ⁇ b), and passes the remaining wavelengths of the incident light (within a predetermined wavelength range). Accordingly, input light propagates along the fiber to the coils 16 and the FBG's 18 reflect particular wavelengths of light back along the fiber.
  • the isolation pad 20 or pads are each a sheet of material disposed between the optical reflective device 18 and the pipe 12 that substantially mechanically isolates the optical reflective device 18, thereby protecting it from external disturbances such as thermally and/or mechanically induced expansion of the pipe 12 and vibrations.
  • Mechanical expansion of the pipe 12 can be occur, for example, when the static pressure within the pipe 12 exceeds the ambient pressure surrounding the pipe 12.
  • the isolation pad is preferably disposed between the splice and the pipe 12.
  • the isolation pad 20 is preferably a low bulk modulus material that can compress in response to thermal expansion of the pipe 12. The thickness of the pad 20 can be varied to suit the application at hand.
  • Figure 1 shows an isolation pad 20A that is disposed under the FBG 18 and a limited area beyond the FBG 18.
  • the other FBG's 18 are mounted on isolation pads 20 that extend around some or all of the circumference of the pipe 12.
  • the characteristics of the pipe 12 are suited to the application at hand. If, for example, the sensors are optical pressure sensors 14 used to sense pressure variations within the pipe, the pipe 12 would have sufficient structural integrity to handle the pressure gradient across the pipe 12, and yet must also be able to deflect (i.e., change in circumference) an amount that will yield useful information. Other sensing applications may require other pipe characteristics.
  • the array of sensors 14 is enclosed in a housing 22 attached to an exterior surface of the pipe 12.
  • the housing 22 is formed from a sleeve 24 extending between a pair of bosses 26.
  • a fiber optic cable 28 extends between the array 14 and remotely located instrumentation (not shown).
  • the cable 28 passes through a sealable port 30 in one or both bosses 26 and connects with the array 14.
  • the housing 22 and the pipe 12 together form a pressure vessel.
  • the pressure within the pressure vessel may be greater than or less than the ambient pressure outside the housing 22.
  • the housing 22 is sealed to protect the array of sensors 14, but does not act as a pressure vessel.
  • the housing 22 is filled with a gas such as, but not limited to, air, nitrogen, argon, etc.
  • the present apparatus has been described in the Detailed Description section as being mounted on a cylindrical pipe 12.
  • the present apparatus is not limited to cylindrical conduits, and can be used with conduits having alternative cross-sectional geometries.
  • the present invention is described above as having an array of sensors 14 that includes a plurality of optical fiber coils 16 and at least one optical reflective device 18, and one or more isolation pads 20.
  • the isolation pads 20 as described herein have particular utility in protecting optical reflective devices, but are not limited to that application. In other instances, the isolation pads can be used to substantially mechanically isolate different types of sensors to protect them from mechanical strain and the like.

Abstract

An apparatus for non-intrusively sensing fluid flow within a pipe includes an array of sensors that include a plurality of optical fiber coils. The array of sensors senses the fluid flow inside the pipe. At least one optical reflective device is disposed between adjacent optical fiber coils. An isolation pad is disposed between each optical reflective device and the pipe.

Description

"Apparatus for Protecting Sensing Devices"
This invention relates to fluid flow sensing devices that use fiber optics and more particularly to those sensing devices that are disposed on the exterior of a conduit.
In the petroleum industry, there is considerable value in the ability to monitor the flow of petroleum products in the production pipe of a well in real time. Historically, flow parameters such as the bulk velocity of a fluid have been sensed with devices directly disposed within the fluid flow. These type devices have several drawbacks including the fact that they provide an undesirable flow impediment, are subject to the hostile environment within the pipe, and typically provide undesirable potential leak paths into or out of the pipe. Sensors disposed outside the fluid flow pipe avoid these problems, but can be subject to other difficulties stemming from the well environment, which is often characterized by extreme temperatures and pressures. Extreme temperatures can disable and limit the life of electronic components. Sensors disposed outside of the production pipe may also be subject to environmental materials such as water (fresh or salt), steam, mud, sand, etc.
What is needed, therefore, is an apparatus that can protect flow sensing devices that are disposed outside a pipe, and one that can protect sensing devices in a well environment characterized by extreme temperatures and pressures and the presence of debris.
It is, therefore, an object of the present invention to provide an apparatus for protecting flow sensing devices that are disposed on the exterior of a pipe, and one that can protect sensing devices in a hostile environment.
According to the present invention an apparatus for non-intrusively sensing fluid flow within a pipe is provided. The apparatus includes an array of sensors that include a plurality of optical fiber coils. The array of sensors senses the fluid flow inside the pipe. At least one optical reflective device is disposed between adjacent optical fiber coils. An isolation pad is disposed between each optical reflective device and the pipe.
An advantage of the present invention is that it enables the collection of data pertaining to fluid flow within a pipe in a non-intrusive manner. An externally mounted sensor for non-intrusively sensing fluid flow within the pipe can be subjected to pipe growth and/or vibrations. In those instances where an optical reflective device is utilized with a sensor, the isolation pad isolates the optical reflective device, and splices if used, from thermally or mechanically related pipe growth and/or vibrations. Error or damage that might otherwise be caused by the pipe growth and/or vibrations is thereby decreased to an acceptable level. In some applications, the isolation pad may be used directly under a sensor to protect the sensor.
The present apparatus is also protected from the environment by a compactly formed housing that encloses the array of sensors and the isolation pad. In a well environment, the housing protects the array from fluid and debris that may enter the annulus between the production pipe and the well casing.
The foregoing and other objects, features and advantages of the present invention will become more apparent in light of the following detailed description of exemplary embodiments given, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic view of the present invention apparatus for non- intrusively sensing fluid flow within a pipe; and
Figure 2 is a diagrammatic sectional view to illustrate the arrangement of components within the present invention apparatus.
Referring to Figures 1-2, an apparatus 10 for non-intrusively sensing fluid flow within a pipe 12 includes an array of sensors 14 that includes a plurality of optical fiber coils 16 and one or more optical reflective devices 18, and one or more isolation pads 20. Each optical fiber coil 16 is wrapped multiple turns around the circumference of the pipe 12 in a manner that allows the length of the optical fiber within the coil 16 to change in response to a change in the circumference of the pipe 12. In alternative embodiments, the optical fiber coil 16 is not wrapped around the circumference of the pipe 12, but rather arranged on the outer surface of the pipe 12. The optical fiber coils 16 may be attached to the pipe 12 by a variety of attachment mechanisms including, but not limited to, adhesive, glue, epoxy, or tape.
The one or more optical reflective devices 18 disposed between coils 16 are wavelength tunable. Each optical reflective device is disposed in-line within an optical fiber extending between adjacent coils. Depending on the type of optical reflective device 18, it may be formed integrally with the optical fiber or spliced into the optical fiber. In a preferred embodiment, the optical reflective devices 18 are fiber Bragg Gratings (FBG's). A FBG, as is known, reflects a predetermined wavelength band of light having a central peak reflection wavelength (λb), and passes the remaining wavelengths of the incident light (within a predetermined wavelength range). Accordingly, input light propagates along the fiber to the coils 16 and the FBG's 18 reflect particular wavelengths of light back along the fiber.
The isolation pad 20 or pads are each a sheet of material disposed between the optical reflective device 18 and the pipe 12 that substantially mechanically isolates the optical reflective device 18, thereby protecting it from external disturbances such as thermally and/or mechanically induced expansion of the pipe 12 and vibrations. Mechanical expansion of the pipe 12 can be occur, for example, when the static pressure within the pipe 12 exceeds the ambient pressure surrounding the pipe 12. In those instances where the optical reflective device 18 is spliced within the optical fiber, the isolation pad is preferably disposed between the splice and the pipe 12. The isolation pad 20 is preferably a low bulk modulus material that can compress in response to thermal expansion of the pipe 12. The thickness of the pad 20 can be varied to suit the application at hand. Although the type of material will vary depending on the application, it is our experience that polyimide foams are a suitable isolation pad 20 material in petroleum well applications. The size of the pad can also be tailored to the application at hand. For example, Figure 1 shows an isolation pad 20A that is disposed under the FBG 18 and a limited area beyond the FBG 18. The other FBG's 18 are mounted on isolation pads 20 that extend around some or all of the circumference of the pipe 12.
The characteristics of the pipe 12 are suited to the application at hand. If, for example, the sensors are optical pressure sensors 14 used to sense pressure variations within the pipe, the pipe 12 would have sufficient structural integrity to handle the pressure gradient across the pipe 12, and yet must also be able to deflect (i.e., change in circumference) an amount that will yield useful information. Other sensing applications may require other pipe characteristics.
To avoid interference from outside sources and to protect from the harsh environment inside the well, the array of sensors 14 is enclosed in a housing 22 attached to an exterior surface of the pipe 12. The housing 22 is formed from a sleeve 24 extending between a pair of bosses 26. A fiber optic cable 28 extends between the array 14 and remotely located instrumentation (not shown). The cable 28 passes through a sealable port 30 in one or both bosses 26 and connects with the array 14. In the preferred embodiment, the housing 22 and the pipe 12 together form a pressure vessel. The pressure within the pressure vessel may be greater than or less than the ambient pressure outside the housing 22. In other embodiments, the housing 22 is sealed to protect the array of sensors 14, but does not act as a pressure vessel. In a preferred embodiment, the housing 22 is filled with a gas such as, but not limited to, air, nitrogen, argon, etc.
Although the invention has been described and illustrated with respect to exemplary embodiments thereof, the foregoing and various other additions and omissions may be made therein and thereto without departing from the spirit and scope of the present invention. For example, the present apparatus has been described in the Detailed Description section as being mounted on a cylindrical pipe 12. The present apparatus is not limited to cylindrical conduits, and can be used with conduits having alternative cross-sectional geometries. In addition, the present invention is described above as having an array of sensors 14 that includes a plurality of optical fiber coils 16 and at least one optical reflective device 18, and one or more isolation pads 20. The isolation pads 20 as described herein have particular utility in protecting optical reflective devices, but are not limited to that application. In other instances, the isolation pads can be used to substantially mechanically isolate different types of sensors to protect them from mechanical strain and the like.

Claims

CLAIMS:
1. An apparatus for non-intrusively sensing fluid flow within a pipe, said apparatus comprising: a sensing array for sensing signals travelling within said fluid flow within said pipe, said sensing array having a plurality optical fiber sensors; at least one optical reflective device disposed between adjacent sensors; and an isolation pad disposed between said optical reflective device and said pipe.
2. The apparatus of claim 1, wherein said apparatus further comprises a housing that attaches to an outer surface of said pipe, thereby enclosing said sensing array, said optical reflective device, and said isolation pad.
3. The apparatus of claim 1 or 2, wherein said isolation pad comprises a material that substantially isolates said optical reflective device from thermal growth of said pipe.
4. The apparatus of claim 1, 2 or 3, wherein said isolation pad comprises a material that substantially isolates said optical reflective device from vibration.
5. The apparatus of any preceding claim, wherein said isolation pad comprises a material that substantially isolates said optical reflective device from mechanical growth of said pipe.
6. The apparatus of any preceding claim, wherein said isolation pad comprises a low bulk modulus material.
7. The apparatus of any preceding claim, wherein said isolation pad comprises a polyimide foam.
8. The apparatus of any preceding claim, wherein said optical reflective devices are fiber Bragg gratings.
9. The apparatus of any preceding claim, wherein a pair of splices connect said optical reflective device to an optical fiber extending between said adjacent sensors, and said isolation pad is disposed between said splices and said pipe.
10. An apparatus for sensing fluid flow within a conduit, said apparatus comprising: a sensor mounted on an outer surface of said conduit; an isolation pad disposed between said sensor and said conduit outer surface; and a housing mounted on said conduit outer surface, enclosing said sensor and said isolation pad.
11. The apparatus of claim 10, wherein said isolation pad substantially isolates said sensor from thermal growth of said conduit.
12. The apparatus of claim 10 or 11, wherein said isolation pad compresses in response to thermal growth of said conduit.
13. The apparatus of claim 10, 11 or 12, wherein said isolation pad comprises a material that substantially isolates said sensor from vibration.
14. The apparatus of claim 10, 11, 12 or 13, wherein said isolation pad comprises a low bulk modulus material.
15. The apparatus of claim 10, 11, 12, 13 or 14, wherein said isolation pad comprises a polyimide foam.
16. A method for protecting sensors disposed on the outer surface of a conduit, said method comprising the steps of: providing an isolation pad; and disposing said isolation pad between said sensor and said conduit outer surface; wherein said isolation pad substantially isolates said sensor from thermal expansion of said conduit.
17. The method of claim 16, wherein said isolation pad comprises a polyimide foam.
18. A method for protecting optical reflective devices disposed on the outer surface of a conduit, said method comprising the steps of: providing an isolation pad; and disposing said isolation pad between said sensor and said conduit outer surface; wherein said isolation pad substantially isolates said sensor from external disturbances selected from the group consisting of thermal expansion, vibration, and mechanical growth of said conduit.
19. The method of claim 18, wherein said isolation pad comprises a polyimide foam.
20. A method for isolating a sensor disposed on the outer surface of a conduit, said method comprising the steps of: providing an isolation pad; and disposing said isolation pad between said sensor and said conduit outer surface; wherein said isolation pad substantially isolates said sensor from external disturbances selected from the group consisting of thermal expansion, vibration, and mechanical growth of said conduit.
PCT/GB2001/005286 2000-11-29 2001-11-29 Apparatus for protecting sensing devices WO2002044656A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU2002223096A AU2002223096A1 (en) 2000-11-29 2001-11-29 Apparatus for protecting sensing devices
EP01998791A EP1344026B1 (en) 2000-11-29 2001-11-29 Apparatus for protecting sensing devices
CA002428584A CA2428584C (en) 2000-11-29 2001-11-29 Apparatus for protecting sensing devices
NO20032076A NO335275B1 (en) 2000-11-29 2003-05-09 Sensor protection device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/726,060 US6501067B2 (en) 2000-11-29 2000-11-29 Isolation pad for protecting sensing devices on the outside of a conduit
US09/726,060 2000-11-29

Publications (2)

Publication Number Publication Date
WO2002044656A2 true WO2002044656A2 (en) 2002-06-06
WO2002044656A3 WO2002044656A3 (en) 2002-10-24

Family

ID=24917051

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/005286 WO2002044656A2 (en) 2000-11-29 2001-11-29 Apparatus for protecting sensing devices

Country Status (6)

Country Link
US (1) US6501067B2 (en)
EP (1) EP1344026B1 (en)
AU (1) AU2002223096A1 (en)
CA (1) CA2428584C (en)
NO (1) NO335275B1 (en)
WO (1) WO2002044656A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9574924B2 (en) 2012-01-12 2017-02-21 Daniel Measurement And Control, Inc. Meter having banded shroud

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI116481B (en) * 2000-04-13 2005-11-30 Metso Paper Inc Composite roll and method for its manufacture
US7028543B2 (en) 2003-01-21 2006-04-18 Weatherford/Lamb, Inc. System and method for monitoring performance of downhole equipment using fiber optic based sensors
US6957574B2 (en) * 2003-05-19 2005-10-25 Weatherford/Lamb, Inc. Well integrity monitoring system
GB2414543B (en) * 2004-05-25 2009-06-03 Polarmetrix Ltd Method and apparatus for detecting pressure distribution in fluids
JP4480645B2 (en) * 2005-08-24 2010-06-16 財団法人電力中央研究所 Pressure measuring device
US7673682B2 (en) * 2005-09-27 2010-03-09 Lawrence Livermore National Security, Llc Well casing-based geophysical sensor apparatus, system and method
US20110116099A1 (en) 2008-01-17 2011-05-19 Halliburton Energy Services, Inc. Apparatus and method for detecting pressure signals
US8736822B2 (en) * 2008-01-17 2014-05-27 Halliburton Energy Services, Inc. Apparatus and method for detecting pressure signals
US20110109912A1 (en) 2008-03-18 2011-05-12 Halliburton Energy Services , Inc. Apparatus and method for detecting pressure signals
US9557239B2 (en) 2010-12-03 2017-01-31 Baker Hughes Incorporated Determination of strain components for different deformation modes using a filter
US9103736B2 (en) 2010-12-03 2015-08-11 Baker Hughes Incorporated Modeling an interpretation of real time compaction modeling data from multi-section monitoring system
US9194973B2 (en) 2010-12-03 2015-11-24 Baker Hughes Incorporated Self adaptive two dimensional filter for distributed sensing data
US9605534B2 (en) 2013-11-13 2017-03-28 Baker Hughes Incorporated Real-time flow injection monitoring using distributed Bragg grating
GB2539804B (en) * 2014-02-24 2020-07-22 Halliburton Energy Services Inc Portable attachment of fiber optic sensing loop
WO2017078660A1 (en) * 2015-11-02 2017-05-11 Halliburton Energy Services, Inc. High-resolution-molded mandrel
WO2017174750A2 (en) 2016-04-07 2017-10-12 Bp Exploration Operating Company Limited Detecting downhole sand ingress locations
BR112018070577A2 (en) 2016-04-07 2019-02-12 Bp Exploration Operating Company Limited detection of downhole sand ingress locations
CN106052726B (en) * 2016-05-24 2019-01-11 刘康琳 A kind of optical fiber sensing probe and its application method
AU2018246320A1 (en) 2017-03-31 2019-10-17 Bp Exploration Operating Company Limited Well and overburden monitoring using distributed acoustic sensors
BR112020003742A2 (en) 2017-08-23 2020-09-01 Bp Exploration Operating Company Limited detection of sand ingress locations at the bottom of a well
CA3078842C (en) 2017-10-11 2024-01-09 Bp Exploration Operating Company Limited Detecting events using acoustic frequency domain features
EP3936697A1 (en) 2018-11-29 2022-01-12 BP Exploration Operating Company Limited Event detection using das features with machine learning
GB201820331D0 (en) 2018-12-13 2019-01-30 Bp Exploration Operating Co Ltd Distributed acoustic sensing autocalibration
EP4045766A1 (en) 2019-10-17 2022-08-24 Lytt Limited Fluid inflow characterization using hybrid das/dts measurements
CA3154435C (en) 2019-10-17 2023-03-28 Lytt Limited Inflow detection using dts features
WO2021093974A1 (en) 2019-11-15 2021-05-20 Lytt Limited Systems and methods for draw down improvements across wellbores
CA3180595A1 (en) 2020-06-11 2021-12-16 Lytt Limited Systems and methods for subterranean fluid flow characterization
CA3182376A1 (en) 2020-06-18 2021-12-23 Cagri CERRAHOGLU Event model training using in situ data

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724316A (en) * 1985-07-12 1988-02-09 Eldec Corporation Temperature independent fiber optic sensor
WO2000000799A1 (en) * 1998-06-26 2000-01-06 Cidra Corporation Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe
WO2000013052A1 (en) * 1998-08-26 2000-03-09 Cidra Corporation Transmission cable splice protector and method

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149492A (en) 1961-03-06 1964-09-22 Astra Inc Fluid pressure gauge
US4080837A (en) 1976-12-03 1978-03-28 Continental Oil Company Sonic measurement of flow rate and water content of oil-water streams
DE3172259D1 (en) 1980-11-21 1985-10-17 Ici Plc Method and apparatus for leak detection in pipelines
US4520320A (en) 1981-09-10 1985-05-28 The United States Of America As Represented By The Secretary Of Commerce Synchronous phase marker and amplitude detector
US4445389A (en) 1981-09-10 1984-05-01 The United States Of America As Represented By The Secretary Of Commerce Long wavelength acoustic flowmeter
US4515473A (en) 1984-09-13 1985-05-07 Geo-Centers, Inc. Photoelastic stress sensor signal processor
JPH0423560Y2 (en) 1987-02-17 1992-06-02
NO166379C (en) 1987-12-18 1991-07-10 Sensorteknikk As PROCEDURE FOR REGISTERING MULTIPHASE FLOWS THROUGH A TRANSPORT SYSTEM.
US5363342A (en) 1988-04-28 1994-11-08 Litton Systems, Inc. High performance extended fiber optic hydrophone
JPH02203230A (en) 1989-01-31 1990-08-13 Daikin Ind Ltd Detector converter for variation in pressure in tube
US5026823A (en) * 1989-09-12 1991-06-25 The Dow Chemical Company Novel alicyclic polyimides and a process for making the same
US5024099A (en) 1989-11-20 1991-06-18 Setra Systems, Inc. Pressure transducer with flow-through measurement capability
US5040415A (en) 1990-06-15 1991-08-20 Rockwell International Corporation Nonintrusive flow sensing system
US5218197A (en) 1991-05-20 1993-06-08 The United States Of America As Represented By The Secretary Of The Navy Method and apparatus for the non-invasive measurement of pressure inside pipes using a fiber optic interferometer sensor
US5398542A (en) 1992-10-16 1995-03-21 Nkk Corporation Method for determining direction of travel of a wave front and apparatus therefor
US5360331A (en) 1993-01-05 1994-11-01 Dynisco, Inc. Injection molding machine pressure transducer
FR2720498B1 (en) 1994-05-27 1996-08-09 Schlumberger Services Petrol Multiphase flowmeter.
US5741980A (en) 1994-11-02 1998-04-21 Foster-Miller, Inc. Flow analysis system and method
NO302441B1 (en) * 1995-03-20 1998-03-02 Optoplan As Fiber optic end-pumped fiber laser
US5670720A (en) 1996-01-11 1997-09-23 Morton International, Inc. Wire-wrap low pressure sensor for pressurized gas inflators
US5845033A (en) 1996-11-07 1998-12-01 The Babcock & Wilcox Company Fiber optic sensing system for monitoring restrictions in hydrocarbon production systems
US6016702A (en) * 1997-09-08 2000-01-25 Cidra Corporation High sensitivity fiber optic pressure sensor for use in harsh environments
US6354147B1 (en) * 1998-06-26 2002-03-12 Cidra Corporation Fluid parameter measurement in pipes using acoustic pressures
US6233374B1 (en) * 1999-06-04 2001-05-15 Cidra Corporation Mandrel-wound fiber optic pressure sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4724316A (en) * 1985-07-12 1988-02-09 Eldec Corporation Temperature independent fiber optic sensor
WO2000000799A1 (en) * 1998-06-26 2000-01-06 Cidra Corporation Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe
WO2000013052A1 (en) * 1998-08-26 2000-03-09 Cidra Corporation Transmission cable splice protector and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9574924B2 (en) 2012-01-12 2017-02-21 Daniel Measurement And Control, Inc. Meter having banded shroud

Also Published As

Publication number Publication date
NO20032076D0 (en) 2003-05-09
EP1344026A2 (en) 2003-09-17
NO20032076L (en) 2003-07-09
CA2428584C (en) 2008-07-22
US6501067B2 (en) 2002-12-31
EP1344026B1 (en) 2011-06-22
WO2002044656A3 (en) 2002-10-24
US20020063200A1 (en) 2002-05-30
CA2428584A1 (en) 2002-06-06
AU2002223096A1 (en) 2002-06-11
NO335275B1 (en) 2014-11-03

Similar Documents

Publication Publication Date Title
US6501067B2 (en) Isolation pad for protecting sensing devices on the outside of a conduit
CA2436813C (en) Circumferential strain attenuator
CA2276449C (en) Apparatus for enhancing strain in intrinsic fiber optic sensors and packaging same for harsh environments
AU754039B2 (en) Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe
EP1356253B1 (en) Apparatus for sensing fluid flow in a pipe
US6450037B1 (en) Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe
CA2587211C (en) Seabed seismic station packaging
CA2428876C (en) Non-intrusive temperature sensor for measuring internal temperature of fluids within pipes
US6191414B1 (en) Composite form as a component for a pressure transducer
EP2079999B1 (en) Pressure sensor
McDearmon Theoretical analysis of a push-pull fiber-optic hydrophone
US5394378A (en) Hydrophone transduction mechanism
US7440644B2 (en) Optical fibre sensor assembly
WO2000003217A2 (en) Composite form as a component for a pressure transducer
MXPA00012659A (en) Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PH PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PH PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2001998791

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2428584

Country of ref document: CA

WWP Wipo information: published in national office

Ref document number: 2001998791

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Country of ref document: JP