flexible riser integrity assessment with advanced mec-fittm … · 2016. 2. 9. · -inspection is...

Flexible Riser Integrity Assessment withadvanced MEC-FITTM technique

Sebastian HartmannSales and Business Development Manager [email protected]

Subsea Expo 2016 - Aberdeen

© Copyright Innospection Ltd. 2016

Flexible Riser Integrity Assessment withadvanced MEC-FITTM technique

Sebastian HartmannSales and Business Development Manager [email protected]

Flexible Riser Inspection with MEC-FIT™

CONTENTS

- External Inspection of Flexible Riser

- MEC Technique

- MEC-FIT Flexible Riser Inspection

- Case Study

- Next Steps


CONTENTS


- MEC Technique


- Case Study

- Next Steps

Unbonded Flexible Pipe


Failure Modes (API 17J)


Source:Hans Out / Shell 2010, How to live with flexible pipe ever after ?Krassy Doynov / ExxonMobil 2013, Improving standards and technology towards achieving robust design and safe operation of flexible risers

- Immediate integrity assurance due to presence of known defects (i.e.breached sheath, filled annulus)

- Future integrity assurance / asset lifetime extension

Reasons for Inspecting


- Immediate integrity assurance due to presence of known defects (i.e.breached sheath, filled annulus)

- Future integrity assurance / asset lifetime extension


CONTENTS


- MEC Technique


- Case Study

- Next Steps


CONTENTS


- MEC Technique


- Case Study

- Next Steps

MagnetisationLevel MFL

MagnetisationLevel MEC

Principle MEC (extended from SLOFEC)Magnetic Field controlled High Frequency Eddy Current

ECfield

Detection of far side defects

Signal Response

controlled Magnetic field

Background Inspection Technique


MagnetisationLevel MFL

MagnetisationLevel MEC

Magnetic Field Lines

ECfield

Signal Response

Eddy Currentsensor

Detection of near side defects

- New Sensor type with field strength measurement

- Field strength control / analysis (retentivity point)

- higher Eddy Current Frequency

- higher sensitivity at increased stand

Splash Zone Inspection Tools(Riser / Caisson / Structure)

Subsea Pipelines Inspection Tools

Background Inspection Techniques & Tools


Subsea Pipelines Inspection Tools

Flexible Riser / Riser / Mooring LineInspection Tools


CONTENTS


- MEC Technique


- Case Study

- Next Steps


CONTENTS


- MEC Technique


- Case Study

- Next Steps

Ultrasonic MAPS-FR Digital Radiography(DRT)

MEC-FIT

(Electromagnetic)Magnetic stressmeasurementtechnique, staticext. mounted,measurement in ±15m from monitor

detection of :fatigue failure,through crackedwires

no penetrationthrough outer layer

Pulsed echoultrasoundtechnique,Ext. scan underwater, slow

detecting offlooding of annulus,thickness of outertensile armour onlyif flooded

Couplant required,

Electromagnetictechnique(Magnetic/EddyCurrent Field),dynamic fast scan

detection of:Corrosion (pitting),CracksWire misalignmentdetection in 1st , 2nd ,(partly 3rd layer)

No couplant required

Requires calibration

External radiographytechnique,static spot RT shots

detection of:Cracks,Corrosion (limitedmin wall lossdetection) Loss of interlock

Flexible Riser Inspection Techniques

NDT solutions for external Flexible Riser Inspection


(X-ray ComputedTomographyVery highresolution singleline scan)

(Electromagnetic)Magnetic stressmeasurementtechnique, staticext. mounted,measurement in ±15m from monitor

detection of :fatigue failure,through crackedwires

no penetrationthrough outer layer

Pulsed echoultrasoundtechnique,Ext. scan underwater, slow

detecting offlooding of annulus,thickness of outertensile armour onlyif flooded

Couplant required,

Electromagnetictechnique(Magnetic/EddyCurrent Field),dynamic fast scan

detection of:Corrosion (pitting),CracksWire misalignmentdetection in 1st , 2nd ,(partly 3rd layer)

No couplant required

Requires calibration

External radiographytechnique,static spot RT shots

detection of:Cracks,Corrosion (limitedmin wall lossdetection) Loss of interlock

Scanner types & deployments

Top side deployable tools

MEC – Hug V1(WC ROV deployable)

MEC – Hug V2- Top side deployable 70

umbilical

- WC Class ROVdeployable

Scanner head(pole shoes & sensor array)

MEC-FIT Evolution Tools


Manual Scanner (hand held)

MEC – Hug V2- Top side deployable 70

umbilical

- WC Class ROVdeployable

MEC – CombiCrawler- WC & Insp. ClassROV deployable

Magnetic Eddy Current – Flexible Riser Inspection Tool

a further development of the SLOFEC™ technique

–+ –-–0

EC/MFCURRENTSENSORS

MAGNETICCIRCUIT

–+ –-–0

MEC-FIT™ PRINCIPLE

MEC-FIT Background Technique


DEFECT IncreasedMagnetic Flux

Level

EC/MFCURRENTSENSORS

TEST PIECEMAGNETIC FIELD

LINES

EDDYCURRENT

PROBE FIELD

Comparison of different magnetization levels on the wire magnetizationMagnetisation Level

Outer Sheath

Armoured LayerPressure Armour

Pressure SheathCarcass

Magnetisation Unit

MEC-FIT Background Technique


B, Tesla

Depiction of wire gap. With the magnet on additional wires of the lowerinternal layer become visible (Pipe 6).

MEC-FIT – FLEXIBLE RISER SCANNING


Signal Phase Analysis - Relevant Indications vsirrelevant indications

General Eddy Current Signal to colourmapping production

MEC-FIT Evolution Process

Reporting for standard 35⁰ type flexibleriser inspection

Mag onvert. Phase

090180270360Orientation [deg]

Mag onhoriz. Phase


Mag offhoriz. Phase

090180270360Orientation [deg]EL [m]

Mag offvert. Phase


90180 1802700 90180 1802700 90180 180270090180 1802700

1

2

1

2

1

2

1

2

Riser Section 2 ( EL -2.5 m to EL 2.5 m)

-2.5

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5


Mag onvert. Phase


Mag onhoriz. Phase


Mag offhoriz. Phase

090180270360Orientation [deg]EL [m]

Mag offvert. Phase


90180 1802700 90180 1802700 90180 180270090180 1802700

1

2

1

2

1

2

1

2

Riser Section 2 ( EL -2.5 m to EL 2.5 m)

-2.5

-2.0

-1.5

-1.0

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

Signal analysis cataloquelocal wallloss

Wirethinning

Tests / Signal analysis

MEC-FIT Evolution Process


Localiseddrilleddefectsfrom insideout

Wirecrack

Signal Catalogue (2014)

Effect of Wire Lay Angle on Detection Capabilities


15° lay angle 55° lay angle


CONTENTS


- MEC Technique


- Case Study

- Next Steps


CONTENTS


- MEC Technique


- Case Study

- Next Steps

North Sea Project – Wire Crack DetectionExternal inspection of 55 degree wire Flexible Riser

Flexible Riser set up:

Target of the technique verification to detect tight cracking in single wire with expectedorientation of 45° and 90°to the wire cross section. Cracking to be detected on theinner wire & outer wire layer.

15.3mm

MEC-FIT Case Studies


North Sea Project – Wire Crack DetectionExternal inspection of 55 degree wire Flexible Riser

Flexible Riser set up:

Target of the technique verification to detect tight cracking in single wire with expectedorientation of 45° and 90°to the wire cross section. Cracking to be detected on theinner wire & outer wire layer.

Additional Task:MEC-Combiscanner deployedby inspection classROV from top of theinstallation

Flexible Riser – subsea (UK)Crack Detection Tests at 55 degreewire angle 13

Flexible Wire set up



Assembly of the structureTest Defects

Picture Defect 3 Picture Defect 6

Flexible Riser – subsea (UK) Crack Detection Tests at 55 degree wire angle

Signals of the defects in the nearside of the outer tensile. Theright shows a sketch of thedefects.

Defects 3 (80%, 45°) and 4(100%, 45°) with magnet on(left) and off (right)



Defects 3 (80%, 45°) and 4(100%, 45°) with magnet on(left) and off (right)

Signals of defects in outer tensile layerfar-side.

Flexible Riser – subsea (UK) Crack Detection Tests at 55 degree wire angleSignals of the defects in inner tensile layer (by different blind tests, wires changed)



Relation crack Depth vs amplitude Detection Conclusion

Big guy watching the scene ...


Scanning in circumferential direction

Inspection Class ROV deploying MEC-FITTM Scanner



CONTENTS


- MEC Technique


- Case Study

- Next Steps


CONTENTS


- MEC Technique


- Case Study

- Next Steps

- HD camera integration to scanner Integration of HD camera systems for outersheath condition assessment

- MEC Automatic analysis algorithm Ongoing development eddy current signalanalysis algorithm and integration intoassessment software

R&D, Ongoing Evolution Process


- HIGH FIELD EDDY CURRENT SENSORS

Penetration through the stiffenermaterial and Polyethylene coating.Target to detect defects at surface ofouter armoured wire in focused area.

Integration of HD camera systems for outersheath condition assessment

- Inspection is an integral part of the process for flexible pipe lifetimeextension.

- The MEC-FITTM technique is capable of detecting defects such as single &multiple wire cracking, corrosion and wire disorganisation in 2 (3) wirelayers

- Demanding projects including inspection of a flexible having a 55° wirestructure and a 15.3mm thick outer sheath have been mastered.

- Different inspection tools implementing the MEC-FITTM technique areavailable for various tool deployment requirements.

Summary


- Inspection is an integral part of the process for flexible pipe lifetimeextension.

- The MEC-FITTM technique is capable of detecting defects such as single &multiple wire cracking, corrosion and wire disorganisation in 2 (3) wirelayers

- Demanding projects including inspection of a flexible having a 55° wirestructure and a 15.3mm thick outer sheath have been mastered.

- Different inspection tools implementing the MEC-FITTM technique areavailable for various tool deployment requirements.

Innospection LimitedHowemoss Avenue

Kirkhill Industrial Estate

Dyce - Aberdeen - AB21 0GP

United Kingdom

P +44 (0) 1224 724 744

F +44 (0) 1224 774 087

Web: www.innospection.com

[email protected]

THANK YOU FOR YOUR ATTENTION


Innospection LimitedHowemoss Avenue

Kirkhill Industrial Estate

Dyce - Aberdeen - AB21 0GP

United Kingdom

P +44 (0) 1224 724 744

F +44 (0) 1224 774 087

Web: www.innospection.com

[email protected]

flexible riser integrity assessment with advanced mec-fittm … · 2016. 2. 9. · -inspection is...

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