EP2635765A2 - Détection et surveillance de paramètre(s) - Google Patents

Détection et surveillance de paramètre(s)

Info

Publication number
EP2635765A2
EP2635765A2 EP11785769.8A EP11785769A EP2635765A2 EP 2635765 A2 EP2635765 A2 EP 2635765A2 EP 11785769 A EP11785769 A EP 11785769A EP 2635765 A2 EP2635765 A2 EP 2635765A2
Authority
EP
European Patent Office
Prior art keywords
fibre
body element
along
elongate
fibre element
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP11785769.8A
Other languages
German (de)
English (en)
Inventor
Geoffrey Stephen Graham
Andrew James Daton-Lovett
Upul Shanthilal Fernando
George Karabelas
Gary Michael Holland
Richard Alasdair Clements
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes Energy Technology UK Ltd
Original Assignee
Wellstream International Ltd
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 Wellstream International Ltd filed Critical Wellstream International Ltd
Publication of EP2635765A2 publication Critical patent/EP2635765A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/01—Risers
    • E21B17/017—Bend restrictors for limiting stress on risers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/007—Measuring stresses in a pipe string or casing
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure
    • E21B47/07—Temperature
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
    • E21B47/135—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency using light waves, e.g. infrared or ultraviolet waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
    • G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0025—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings of elongated objects, e.g. pipes, masts, towers or railways
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
    • G01M5/0091—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by using electromagnetic excitation or detection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Definitions

  • the present invention relates to a method and apparatus for monitoring at least one parameter associated with a structure.
  • the present invention relates to a method of monitoring a fibre optic system located on or in a structure to derive data indicative of strain and/or temperature in the structure.
  • Another type of structure for which monitoring is desirable is an unbonded flexible pipe of the type used in the oil and gas industry in the field of offshore production.
  • Such flexible pipe includes a length of flexible pipe body terminated at one or more ends with an end fitting.
  • the flexible pipe can be used as a flow-line, riser, jumper or the like.
  • Monitoring strain and/or temperature and/or some other parameter is a way to assess the past, current and/or future performance of the pipe.
  • optical fibres can be used as strain gauges, temperature gauges, temperature indicators and strain measurements can be made which are either localised, distributed or semi-distributed depending upon the manner in which the optical fibre is interrogated and regions/sensors in the optical fibre are arranged.
  • WO2009/068907 the disclosure of which is incorporated herein in its entirety, discloses a way in which an optical fibre can be wrapped helically around a flexible pipe and certain measurements taken from which parameters associated with the pipe can be determined.
  • optical fibres are inherently relatively fragile and if the underlying structure which is being monitored is prone to substantial mechanical movement then mechanical stresses and strains can be induced in the fibre which causes fibre failure. Therefore, the use of optical fibre has until now been limited to uses where the movement of the optical fibres has been unduly limited.
  • the method of spirally wrapping an optical fibre around the body of a structure such as a flexible pipe as shown in WO2009/068907 can reduce a peak strain seen by the optical fibres to a certain extent they are inherently limited in that they can not be used to measure along a single axis, deployed onto a circumferentially discontinuous structure or provide accurate data if the period of the helix is a poor fit with the
  • an apparatus for monitoring at least one parameter associated with an elongate structure comprising: at least one elongate support body element arranged along a longitudinal structure axis associated with an elongate target structure; and at least one optic fibre element arranged substantially helically along a longitudinal body element axis associated with the at least one support body element.
  • a method of monitoring at least one parameter associated with an elongate structure comprising the steps of: providing at least one elongate support body element, comprising at least one optic fibre element arranged substantially helically along a longitudinal body element axis associated with the body element, along a longitudinal structure axis associated with an elongate target structure; and via a sensing system, monitoring at least one characteristic associated with the fibre element, said characteristic being indicative of a parameter associated with the elongate structure.
  • a method of manufacturing flexible pipe body comprising: providing a fluid retaining layer; providing at least one armour layer; and providing at least one elongate support body element, comprising at least one optic fibre element arranged substantially helically along a longitudinal body element axis associated with the body element, along a longitudinal pipe body axis associated with the pipe body.
  • an apparatus for monitoring at least one parameter associated with an elongate structure comprising: at least one optic fibre element arranged substantially helically along a longitudinal body element axis of an elongate support body element, said body element being arranged along a longitudinal structure axis; wherein a length of the fibre element between first and second planes spaced apart along, and perpendicular to, the longitudinal structure axis, is greater than a comparable length of the optic fibre element wound, at a predetermined pitch, between the first and second planes.
  • Certain embodiments of the present invention provide the advantage that a length of optical fibre which can be provided between chosen points of a target structure is greater than a comparable length which prior art techniques can provide.
  • the extra length relative to the prior art techniques means that if an underlying structure contracts or extends in length by a certain distance there is a proportional contraction/extension in the optical fibre which is less than the contraction/extension experienced with prior known techniques.
  • Certain embodiments of the present invention provide the advantage that an optical fibre may be wound in a substantially helical fashion around an underlying support layer which is then located along a predetermined length of the structure where a parameter is to be monitored. This enables the fibre optics to be duly located and monitored in an efficient manner.
  • Figure 1 illustrates a free hanging catenary riser
  • Figure 3 illustrates regions of a flexible pipe
  • Figure 2 illustrates flexing of a bend stiffener and pipe body
  • Figure 4 illustrates an optic fibre winding around an underlying cylindrical body
  • FIG. 5 illustrates winding an optic fibre
  • Figure 6 illustrates winding an optic fibre
  • Figure 7 illustrates a support body and fibre optic winding arranged in a linear fashion
  • Figure 8 illustrates a support body and fibre optic winding arranged in a helical fashion
  • Figure 9 illustrates a rectangular support body and fibre optic winding
  • Figure 10 illustrates a system for monitoring parameters associated with a flexible pipe and carrying out analysis
  • Figure 1 illustrates a flexible pipe (10) which includes a length of flexible pipe body (1 1 ) terminated at a first end (12) with an end fitting (13) and terminated at a further end (14) with a further end fitting (15).
  • the flexible pipe extends from a seabed region (16) to a surface region (17).
  • a floating platform (18) is used to secure an upper end fitting (15) of the pipe.
  • a bend stiffener (19) is utilised to limit the bending of the flexible pipe as will be appreciated by those skilled in the art.
  • Figure 1 thus illustrates an example of an elongate structure, in this case a flexible pipe, in which motion induced in the flexible pipe causes stresses and strains and/or temperature fluctuations which from time to time or constantly it is advisable to monitor.
  • embodiments of the present invention are applicable to a broad range of structures where one or more parameters associated with those structures are to be monitored.
  • embodiments of the present invention can monitor parts of bridges, road surfaces and/or land regions and/or lampposts and/or wind turbine blades and/or yacht masts and/or suspended power cables or the like.
  • a parameter which might be determined is fatigue damage to the pipe structure under the bend stiffener as in such a system this region is predicted to be the area where maximum fatigue damage to tensile layers of the flexible pipe will occur.
  • Certain embodiments of the present invention provide a system which will collect data which will be stored in a database and this can be utilised in real time or at a later point in time to understand the fatigue and movement behaviour of the pipe in service. This can be compared to pre-stored predicted values which will allow revised life predictions to be made on the pipe system and/or early prediction of problems or failure.
  • the system can be utilised to calibrate system models to more accurately predict the real world system behaviour which will allow less conservatism in system design based on revised models.
  • a parameter which it is advantageous to monitor in such a system is the region of pipe in high tension low curvature systems is predicted to be inside the bend stiffener at the top of the riser. This area is subjected to high tension and the highest topside curvature which combines to produce the area of maximum fatigue damage to the tensile layers.
  • the x axis is the meterage of the pipe around the bend stiffener so Figure 2 illustrates from 6 metre above the flange of the bend stiffener (15) to 1 1 metres below the bend stiffener flange (1 1 metres).
  • the central horizontal line (21 ) represents the area where the bend stiffener covers the pipe.
  • the peak curvature is predicted at around 0.9 to 1 metres and this equates to a minimum bending radius of the pipe of around 8 metres however in a lower region (20) the measured radius is only between 50 metres at the 5 metre end and 1 ,000 metres at the 9 metre end. This what the curvature measurement system will measure.
  • the shape of the curve is predicted to be similar to the system being monitored so that although each riser system has a different shape decay curve that curve is similar for the different wave patterns the riser will be subjected to.
  • the curve shape is known and the curvature is measured using an optical fibre system the maximum curvature is able to be predicted by using curve fitting algorithms.
  • Combining curvature data and tension allows the fatigue damage at the point of maximum damage to be calculated. With the fatigue data it is possible to predict the remaining life of the system. Actual damage versus predicted damage. Changes to the pipe behaviour indicating a possible excursion which may be damaging to the riser system.
  • the monitoring system may utilise different types of sensor system.
  • One, two or more different types of sensor system can be utilised to provide data points for further analysis.
  • tension in the system may be determined using strain gauges or load cells or the like which detect the gross tension of the flexible pipe topside or by using a stress measurement method such as MAPs which uses magnetic sensors to determine the stress induced in the flexible pipe.
  • MAPs stress measurement method
  • Another type of sensor which might be used is an angle of inclination sensor. This provides useful information which can be an indicator of vessel or bend stiffener inclination.
  • optical fibres can be utilised to determine temperature at positions along the structure.
  • Embodiments of the present invention are not restricted to such distributed systems.
  • An optic fibre is utilised as a distributed strain gauge (or temperature gauge) providing an average strain value for a predetermined (for example, 1 metre) length of fibre as a data point. Then the one metre average is moved approximately 400 mm and another data point is given. Therefore a strain over 1 m of fibre is provided each 400 mm of the fibre length.
  • An advantage of this system is the use of relatively inexpensive optical fibre can be utilised and a number of data points produced is high.
  • Figure 3 illustrates other locations where monitoring of parameters associated with a flexible pipe can be utilised.
  • locations include sub-sea arches (30) and/or touchdown points (31 ) where the range of strain induced in the flexible pipe may be as high as plus or minus 7% or greater and long lengths of hundreds of metres may be monitored. These measurements will be required for pipe systems where the predicted high fatigue damage locations are not necessarily the topside area but are other locations. Other regions including, optionally the whole length, can be monitored.
  • Brillouin scattering and/or Bragg gratings or other sensing techniques may be used with the optic fibres according to certain embodiments of the present invention.
  • Bragg grating systems use a fibre which has been written with a discreet grid in regions which act as strain gauges (or temperature gauges). These systems work at high frequencies and are very accurate as they pick up a strain or temperature along a very small region (5mm or smaller).
  • the Bragg gratings can be multiplexed on a single fibre. That is to say, an interrogator can see through one Bragg to a more distant one as long as the reflected frequencies do not overlap.
  • Figure 4 illustrates how one or more optic fibre (40) is wrapped around and bonded to a cylindrical support body (41 ) in a helical formation. Straining the cylindrical support body (41 ) will consequently strain the optic fibre.
  • a helical groove (50) may be cut into the cylinder to take the fibre as shown in Figure 5.
  • Figure 6 illustrates a helical optic fibre positioned in the internal bore of a tube and held in place by an adhesive such as epoxy or the like.
  • a cross-section of the support body (41 ) is substantially circular in cross-section having a diameter d.
  • Figure 7 illustrates how the optic fibre winding and support body (41 ) illustrated in Figures 4 to 6 can be arranged in a linear arrangement along a longitudinal axis Y associated with a target structure which is to be monitored.
  • the fibre length from two planes A and B spaced apart longitudinally along the axis Y of the target structure is given by:
  • H is the distance where strain is measured.
  • the optic fibre bonded directly along the length of the cylinder (41 ) experiences the same strain as the cylinder.
  • the overall strain that the fibre is subjected to is reduced.
  • Increasing the amount of wraps on a given length of section results in greater strain de-amplification.
  • This method allows a cylinder with bonded optic fibre to be subjected to a strain around a radius R which is beyond the breaking strain of the fibre.
  • the support body is of small enough diameter to allow a minimum of one turn to satisfy a discrimination length of a sensing system utilised.
  • the helix is wrapped relatively tightly and in close proximity to the underlying body to achieve a high de-amplification co-efficient.
  • the support body remains elastic over a large strain range.
  • the support body is large enough not to bring about any damage to the fibre or exceed the critical angle.
  • the length of fibre and angle of fibre to strain direction may optionally be appropriately matched to get the optimum measuring requirements such as, but not limited to, sensitivity, resolution and de-amplification.
  • a minimum bend radius of the optic fibre is not exceeded.
  • a radius of curvature of the optic fibre wound about the support body is not so tight that the fibre boundary exceeds a critical angle associated with the optic fibre.
  • Figure 8 illustrates an alternative way in which the optic fibre and support structure may be arranged with respect to the underlying target structure. As illustrated in Figure 8 rather than lay the support body in a linear fashion along the longitudinal axis of the target structure, the support body and helically wound optic fibre may themselves be helically wound around the target structure. This further enhances the introduction of a greater fibre length for a given distance between planes along the longitudinal axis of the target structure.
  • Figure 9 illustrates an alternative embodiment of the present invention in which an optic fibre (90) is helically wound around an underlying support body (91 ) which has a substantially rectangular cross-section with rounded end regions (92).
  • a length of the support body (91 ) is b and a width of the support body is d.
  • a fibre length between adjacent planes spaced apart along a longitudinal axis of the support body and substantially perpendicular thereto is P. This is a pitch of winding of the optic fibre.
  • the fibre length L is given by: Equation 4
  • the optic fibre (90) and the rectangular shaped rod (91 ) of Figure 9 may be utilised as described in Figures 7 or 8 noted above. That is to say, as per Figure 7, the optic fibre and rectangular support body may be provided linearly along a longitudinal axis associated with the target structure. Thus, at least one optic fibre element is arranged substantially helically along a longitudinal body element axis associated with at least one support body element with that support body element itself being arranged along a longitudinal structure axis associated with an elongate target structure. Alternatively, as shown in Figure 8, the optic fibre and rectangular support body may itself be wrapped helically along a longitudinal axis of a target structure. Thus, at least one optic fibre element is arranged substantially helically along a longitudinal body element axis associated with at least one support body element and that support body element is itself arranged along a longitudinal structure axis associated with an elongate target structure.
  • one, two or more optic fibre and support body arrangements may be themselves arranged along a longitudinal axis of a structure in which a parameter is to be sensed.
  • Each optic fibre is repeatedly or continuously bonded to the support body about which it is helically wound.
  • a parameter being monitored is temperature it is possible to pack more and more fibres per unit length of the support body by winding windings of the optic fibre more tightly. It will be appreciated that when this is done the angle the winding makes with respect to the axis of the support body approaches 90 °. This maximises a strain demagnification effect and increases resolution of a system. Other parameters may be similarly dealt with however when strain is monitored a trade off can be made depending upon the circumstances (whether strain demagnification, resolution and/or measuring sensitivity is most important for a particular use) to select the pitch of winding on the support body and thus the number of windings per unit length versus the angle the optic fibre makes with respect to the strain direction.
  • Having a helix angle close to normal to a strain direction will demagnify a strain on a fibre close to zero, will increase resolution, but will reduce sensitivity.
  • resolution is an effective distance between measurement points.
  • Sensitivity is related to an accuracy of measurements made at those points.
  • the flexible pipe may have one or more armour layers.
  • armour layers are typically formed during a manufacturing phase by wrapping armour wire windings helically around an underlying layer.
  • embodiments of the present invention can replace one or more of the armour wire windings with an optic fibre and support body having a cross-section compatible with or matching a cross-section of the armour wire.
  • the pitch at which the optic fibre and support body is wound is determined by a pitch selected during the design and manufacture of the flexible pipe.
  • the rectangular-shaped rod with radius corners illustrated in Figure 9 may be manufactured from a material that can sustain elastic behaviour up to the maximum strain levels that are expected to be measured in service.
  • the rod material could, for example, be metallic, polymeric or composite or the like.
  • a groove is provided to lay and fix the optical fibre into the rod.
  • the fibre is bonded using readily available adhesives suitable for the surface of the rod/structure assembly.
  • the path of the groove is designed so that the axial traverse of the group along the length of the rod is the same over the entire length of the groove, giving a fixed orientation of the groove relative to the axis of the rod.
  • the strain monitoring rod can be temporarily attached, permanently bonded or directly incorporated to the structure where strain/displacement is to be monitored.
  • the minimum value of R which is a radius of curvature at the radius ends of the rectangular rod depends on a maximum strain that the fibre can sustain.
  • L 0
  • an achievable amount of de-magnification is low unless the rod diameter is large as the optic fibre can only work as a light conduit up to a certain bend radius and as the bend radius decreases, the light is gradually lost through walls of the fibre.
  • Use of a rectangular rod has an advantage that length of fibre can be increased without increasing the diameter of the rod.
  • the shape of the rod has the benefit that the strain measurement is insensitive to the bending of the rod as the tensile and compressive strains cancel out when used with a distributed strain sensing system. Cancelling the bending effect applies equally to both circular and elongated cross sections of rod. Aptly the averaging distance of the strain measurement equals the length L of the fibre over one pitch of spiral. In such circumstances only the axial strength of the rod is measured. Aptly, the system can be used with a Bragg grating-based discrete sensing system to reduce gross strain on the fibre.
  • the rod may aptly be manufactured by various methods such as machining, extrusion then machining or by use of a number of overlapping rollers with the impression of the groove used to form the groove on a pre-formed rod.
  • the rod may be manufactured using rapid prototyping techniques such as laser centring or 3D printing.
  • Figure 10 illustrates a configuration of hardware/software according to embodiments of the present invention.
  • One or more sensors are monitored either by a single monitoring unit with multiple inputs or a number of monitoring units with a common timebase.
  • This data is transferred to a database where the data will be stored in a manner which allows easy interrogation. Due to data quantity it is preferable that a short-term detailed data set will be kept for a period of, for example, six months which will include all data recorded then a further database will be used to store longer term trend data which can be created by compressing the short-term data.
  • the short-term data is used in case of accident or failure.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Pipeline Systems (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Optical Transform (AREA)

Abstract

L'invention concerne un dispositif et un procédé permettant de surveiller au moins au paramètre associé à une structure allongée. Le dispositif comprend au moins un élément de corps de support allongé, placé le long d'un axe d'une structure longitudinale associée à la structure allongée voulue; et au moins un élément de fibre optique, placé de manière sensiblement hélicoïdale le long d'un axe d'élément de corps longitudinal associé à l'élément ou aux éléments de corps de support. L'invention concerne aussi un procédé de fabrication d'un corps de tuyau flexible.
EP11785769.8A 2010-11-03 2011-10-25 Détection et surveillance de paramètre(s) Withdrawn EP2635765A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1018534.6A GB201018534D0 (en) 2010-11-03 2010-11-03 Parameter sensing and monitoring
PCT/GB2011/052070 WO2012059736A2 (fr) 2010-11-03 2011-10-25 Détection et surveillance de paramètre(s)

Publications (1)

Publication Number Publication Date
EP2635765A2 true EP2635765A2 (fr) 2013-09-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11785769.8A Withdrawn EP2635765A2 (fr) 2010-11-03 2011-10-25 Détection et surveillance de paramètre(s)

Country Status (8)

Country Link
US (1) US20130208259A1 (fr)
EP (1) EP2635765A2 (fr)
CN (1) CN103348087A (fr)
AU (1) AU2011324918A1 (fr)
BR (1) BR112013010490A2 (fr)
CA (1) CA2814590A1 (fr)
GB (1) GB201018534D0 (fr)
WO (1) WO2012059736A2 (fr)

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GB2526247B (en) 2014-03-12 2018-12-05 Rtl Mat Ltd Methods and apparatus relating to deployment of fibre optic assemblies by burial.
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GB201411874D0 (en) 2014-07-03 2014-08-20 Wellstream Int Ltd Curvature sensor and sensing method
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AU2011324918A1 (en) 2013-05-09
GB201018534D0 (en) 2010-12-15
CA2814590A1 (fr) 2012-05-10
BR112013010490A2 (pt) 2016-08-02
US20130208259A1 (en) 2013-08-15
WO2012059736A2 (fr) 2012-05-10
WO2012059736A3 (fr) 2012-12-20

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