Carl-Petter Halvorsen AOG the life cycle solution for flexibles

Transcription

1 Carl-Petter Halvorsen AOG

2 From Cradle to Grave Introduction to flexlife Delivery Management Project History Integrity Management Strategy Flexible pipe failure modes What the UK HSE say Current state of the art The real state of the art Find Fix The benefit to you Annulus Scanning Development

3 What is flexlife? Independent consultancy Two Business Streams Delivery Management of flexible pipe projects Integrity Management of flexible pipe assets Highly focused on practical solutions More dedicated flexible pipe experts than other independent Highly experienced in manufacture and installation of flexible pipes

4 Project History Inpex Browse - Ichthys Gas Field Development Addax - Okwori Phase III ChevronTexaco- Agbami Apache AUS - Van Gogh Apache - Forties D-C TOTAL E&P UK - Forvie TOTAL E&P UK - Nuggets PA Resources - Remote Kill Project Maersk Frame Agreement NKT - Various Bid Support Subsea 7 - Chestnut, Tombua Landana Saipem Aquilla Hess Triton FPSO CNR BP Schiehallion Statoil Norne FPSO Premier Oil Balmoral FPSO

5 Integrity Management Strategy

6 Flexible pipe failure modes 1st - Outer Sheath Damage Burst Installation Damage Abrasion Damage Dropped object 2nd - Aged Internal Sheath Mainly PA11 (Industry JIP $1000,000 s) 3rd - Internal Sheath Pull Out Mainly affecting Technip Obsolete through design/materials

7 Outer sheath failure Small hole leads to: Seawater flooded annulus Corrosion fatigue Snapped wires Can cause catastrophic failure Typical service life of flooded dynamic riser - 2 years HSE & NPD very aware of the problem Potential for catastrophic failure is very high

8 What the UK HSE say What the UK HSE say Pipelines Safety Regulations: Regulation 13: The operator shall ensure that a pipeline is maintained in an efficient state, in efficient working order and good repair. Offshore Installation Safety Case Regs: Regulations & Schedule 7 - Duty holder to put into effect and maintain a verification scheme. Flexibles have the potential for a major leak and have poor Inspect ability and poor fire resistance Preference to connect risers below water line or in sealed I/J tubes

9 Current state of the art Annulus testing Positive Pressure Vacuum testing (most popular) GVI (General Visual Inspection) Vacuum testing is less accurate than positive pressure Require access to topside endfitting Testing can take days per riser Results are an indication only

10 Development of scanning technology

11 The real state of the art AGR s Neptune scanning of flexible pipes for flooding AGR s Neptune scanning of flexible pipes for snapped or corroded wires ROV deployable Instant 100% accurate Only method in the world

12 The real state of the art

13 Tank testing

14 Obs ROV and Scanning

15 Scanning flexible pipe with Marine Growth

16 Unflooded Flooded

17 Case example Flooded at 300m Water depth Unflooded at 30m Water depth

18 Find Scan for flooding Scan for Corrosion Scan for Snapped wires Perform Service Life assessment based on actual corrosion We are the only company capable of performing this for you

19 Fix Permanent Repair of Annulus Self repairing dynamic clamprov Deployable Uses Plasma Technology Modular repair any length of breach I/J tube sealing

20 The benefit to you Current vacuum testing can only tell you have a problem This usually results in either shutting down the riser Or replacing the riser If we find you have a problem we will provide you the solution Scanning 100% Accurate Armour Wire Thickness Snapped Wires Assures the pipe is safe to operate

21 Annulus Scan - Development High Def Mapping Surface Pitting Real Time permanent monitoring using collars Annulus Monitoring in I/J tubes

22 The lice cycle of flexible pipe Procurement/Installation Re-use Integrity management Life cycle Decommission

23 Questions?