Inspection Approaches & Experience. for Inspecting Challenging Subsea Assets

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1 Subsea Malaysia 2015 Inspection Approaches & Experience for Inspecting Challenging Subsea Assets Jason Tong Regional Sales Engineer, Innospection

2 Subsea Malaysia 2015 CONTENT - MEC Technique (from SLOFEC to MEC...Background) - Riser / Conductor / Caisson Inspection - Flexible Riser Inspection - Subsea Pipeline inspection - Mooring Lines - Hull Inspection - Deployment Concept in Splash Zone areas

3 Background Inspection Techniques Saturation Low Frequency Eddy Current (SLOFEC) Typical Operation and detection Pipe Scanning WT range : up to 1 Vessel Scanning WT range : up to 33mm Micro Biological Corrosion (MIC/SRB) Amonium Chloride Salt Corrosion General Corrosion / C02 Corrosion Tank Scanning WT range : up to 30mm through coating up to 10mm Corrosion / Cracking

4 Background Inspection Techniques Principle MEC (extended from SLOFEC) Magnetic Field controlled High Frequency Eddy Current Eddy Current Signal Response Eddy Current sensor EC field controlled Magnetic field Magnetisation Level MEC Magnetisation Level MFL Detection of far side defects Signal Response EC field Magnetic Field Lines - New Sensor type with field strength measurement - Field strength control / analysis (retentivity point) - higher Eddy Current Frequency - higher sensitivity at increased stand

5 MEC - Principle A COMPARISON METHOD Calibration defects Indication evaluation compared to calibration Signal Phase for far side defects Signal Phase for top side defects

6 MEC - Principle CAPABILITIES fast inspection facilitating scanning of large areas efficiently Scanning speed up to 24m/min Sensitive to detection of local metal loss (smaller pitting) Standard Setting from 5mm/10mm diameter from 10% wall loss Distinguishing external / internal wall loss Semi quantitative relative inspection technique Inspection result in comparison to calibration Wall Loss Display in 10% step (in cases 5% step) classification in full range 0-100% Standard colour coding Typical Accuracy +/- 10% (on fine tuned analysis +/- 5%) No need for liquid couplant, general cleaning necessary Wall thickness penetration capabilities up to 35mm/42mm (depending on magnetisation) Wall loss mapping in c-scan format, individual defects analysed by size and tabled, matrix data possibility Allowing penetration of non electric conductive coatings (qualified to date 15mm) & conductive cladding (qualified to date 4mm)

7 Background Inspection Technique Online Analysis Reporting Color Mapping Report EXTERNAL DEFECT ANALYSIS Distance to GTF [meter] Flange Weld (FW) Section mm INTERNAL DEFECT ANALYSIS Section mm Top of steel (TOS) Section mm < 20% 20-30% 30-40% 40-60% > 60% 34 Section mm Section 5 450mm COLOUR PALETTE DEFECT CLASSIFICATION: Signal of the reference internal defect (50%depth) in the signal Y- component / phase analyse window Client : Location : OIL COMPANY REFINERY Date : K-No. : July/Agust /00 TM SLOFEC - PipeScan Report Subject : Oil Rundown Lines Section : 4 Pipe Identif. : P-53

8 Background Inspection Technique MEC Combi Crawler & PipeScanner MEC Combi Crawler MEC MPS200+ MEC-Combi Pipe Crawler V1 MEC-Combi Pipe Crawler V2 MEC Hug Crawler MEC Pole Shoe &Sensor Array Focus: external/internal corrosion Mapping Add on Technique for MEC-Combi concept UT Sensor (single) UT Array Absolute WT Mapping PEC Average WT Mapping Eddy Current Sensor Array Crack Detection Subsea Laser Geometry Scan HD Camera Visual Inspection

9 Subsea Malaysia 2015 CONTENT - MEC Technique (from SLOFEC to MEC...Background) - Riser / Conductor / Caisson Inspection - Flexible Riser Inspection - Subsea Pipeline inspection - Mooring Lines - Hull Inspection - Deployment Concept in Splash Zone areas

10 SUBSEA APPLICATIONS CAISSONS Different Deployments for Caisson Inspection Internal Scanning External Scanning from Top Side External Scanning by ROV Deployment -Above & below water level -Reaching 100% area -Caisson out of operation -Pumps to be pulled -2 men operation -Not weather dependant -Above & below LAT - down to 1. subsea clamp -Caisson in operation -2 men operation & RAT -weather dependant -Splash zone cleaned - Typically LAT - areas ROV can deploy tool accept clamps/guides - Caisson in operation - 2 men operation & ROV - areas to be generally cleaned

11 Riser Inspection Coated Riser Inspection MEC-MPS200+ scanner detection capability 6 x 17mm 10mm Stopaq Test Riser CP 1 12 x WT 25.4mm 15mm Neoprene 6 x 17mm 5mm Epoxy Scan Direction

12 Riser Inspection MEC Combi crawler ROV deployed Scanning with MEC & Ultrasonic Sensor arrays MEC Scan vs UT Array Scan

13 Riser Inspection EXTERNAL COATED RISER INSPECTION (integrated cleaning head) M-PS200+ Subsea Scanner system including cleaning head. Rotating Barracuda nozzles at up to PSI.

14 Riser Inspection EXTERNAL CLADD RISER INSPECTION MONEL Clad Riser Scan - Rotational inspection head Defects Carbon Steel 20mm Monel 3mm

15 Subsea Expo 2015 CONTENT - MEC Technique (from SLOFEC to MEC...Background) - Riser / Conductor / Caisson Inspection - Flexible Riser Inspection - Subsea Pipeline inspection - Mooring Lines - Hull Inspection - Deployment Concept in Splash Zone areas

16 MEC-FIT Flexible Riser Inspection Experience MEC-FIT Magnetic Eddy Current Flexible Riser Inspection Technique Wall Loss & Crack detection of steel wire layers

17 MEC-FIT Flexible Riser Inspection MEC-FIT Flexible Riser Inspection Magnetisation Level Comparison of different magnetization levels on the wire magnetization Pressure Sheath Carcass Armoured Layer Pressure Armour Outer Sheath Magnetisation Unit B, Tesla

18 MEC-FIT FLEXIBLE RISER SCANNING MEC-FIT TEST / QUALIFICATION Defects Indication differentiation Crack simulation vs local wall loss Signal Repeatability

19 MEC-FIT Flexible Riser Inspection Artificial defect - crack in single wire in second wire layer wire gap closed for the scan Test Defect : machined crack in second armour layer Tight Crack 50% depth of the wire

20 MEC-FIT Flexible Riser Inspection MEC-FIT - Flexible Riser Pipe Inspection Tool V1 - ROV adapted V2 - self crawling: top side or ROV deployed

21 MEC-FIT Flexible Riser Inspection PROJECT: Subsea Flexible Pipe. Detection of Wire misalignment & wire defects in area of upheaval buckling Comparison of metal loss defect detection for various wire angles Tasks - a 15⁰-flexible pipe structure - detection of wire misalignment - differentiation of wire misalignment vs / defects

22 MEC-FIT Flexible Riser Inspection MEC- Combi PipeCrawler V2 Operations & FAT for Flex Riser Pipe Subsea Flex Riser pipe with 15degree wire organisation. Scanning on the horizontal section to detect - wire misalignment - wire cracking - wire corrosion

23 Subsea Expo 2015 CONTENT - MEC Technique (from SLOFEC to MEC...Background) - Riser / Conductor / Caisson Inspection - Flexible Riser Inspection - Subsea Pipeline inspection - Mooring Lines - Hull Inspection - Deployment Concept in Splash Zone areas

24 Subsea Pipeline Inspection M-PS200+ MEC-PipeCrawler V2 e.g. Project : 63m length, 10inch pipe, WT 19mm, coated 180 coverage = 1 shift

25 Subsea Pipeline Inspection MEC-Combi Pipe Crawler ROV deployed Self crawling systems with Inspection technology adaptations : SLOFEC, UT, Visual, Laser, PEC

26 Subsea Pipeline Inspection MEC Combi Crawler with Laser system for pipe geometry to scan Scanner with front Laser Input for FEM calculation Scratch Dent

27 Specific Subsea Inspections R&D External Subsea Pipescanning R&D work for larger stand off scanning - i.e. heavy coated Flowlines for localized defect detection TEST # Total stand off to Steel surface [mm] Detection result of 17mm diameter Defect - 8mm depth Test very good Test good Test good Test results of stand off up to 42mm demonstrating detection of the internal defect Test low but visable

28 Subsea Pipeline Inspection Subsea PEC Deployment The SUBSEA PEC is a static measurement with capability to inspect through up to 200mm stand off (coating). Two sensors are guided to scan circumferentially and axially along the pipe. Pipe Diameter Range 8 36

29 Subsea Expo 2015 CONTENT - MEC Technique (from SLOFEC to MEC...Background) - Riser / Conductor / Caisson Inspection - Flexible Riser Inspection - Subsea Pipeline inspection - Mooring Lines - Hull Inspection - Deployment Concept in Splash Zone areas

30 Mooring Line Inspection High Field Eddy Curent Sensors Mooring Line Inspection Project Newly developed Eddy Current sensors to penetrate through 35mm stand off for detection of cracks - localised defects - galvanisation removal at wires

31 Mooring Line Inspection MEC WireScan Mooring Line Scanning with High Field Eddy Current Sensors Flexible Eddy Current Sensor Array System in front of MEC-Combi Pipe Crawler

32 Subsea Expo 2015 CONTENT - MEC Technique (from SLOFEC to MEC...Background) - Riser / Conductor / Caisson Inspection - Flexible Riser Inspection - Subsea Pipeline inspection - Mooring Lines - Hull Inspection - Deployment Concept in Splash Zone areas

33 SUBSEA APPLICATIONS SHIP HULL MEC-Combi Crawler Robot - deployed for FPSO Hull Inspection Automatic Position Control

34 Subsea Expo 2015 CONTENT - MEC Technique (from SLOFEC to MEC...Background) - Riser / Conductor / Caisson Inspection - Flexible Riser Inspection - Subsea Pipeline inspection - Mooring Lines - Hull Inspection - Deployment Concept in Splash Zone areas

35 Specific Subsea Inspections R&D MEC-Combi Robot Concept of the self operating subsea cleaning & inspection system

36 THANK YOU FOR YOUR ATTENTION Head Office: Innospection Limited Howemoss Avenue Kirkhill Industrial Estate Dyce - Aberdeen - AB21 0GP United Kingdom P +44 (0) F +44 (0) Singapore Office: Innospection (S) Pte Limited No. 14 Kwong Min Road Singapore(628715) P M Web: info@innospection.com / j.tong@innosepction.com

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