Sureflex JIP - sharing the latest flexible pipe integrity management guidance and operational experience Subsea Expo, AECC, 8th February 2018 Ian Macleod, Engineering Manager

Sureflex JIP project history

1990

2020

2010

2000 UKOOA Flexible Pipe Integrity JIP

Sureflex JIP (2015-17)

Sureflex JIP (2009/10), Oil & Gas UK

HSE Monitoring / Integrity JIP

Sureflex network (proposed)

Scope • Population and damage statistics • Inspection and monitoring review • Share IM good practice / guidance • Review technology development • Share operator case studies

Participants • 13 members, plus non-member contributions • ~40 contributor organisations

− Operators, manufacturers, certification bodies, regulators, engineering contractors, inspection / monitoring vendors

Sureflex JIP scope and participants

Full report publication • Flexible Pipe Integrity

Management Guidance & Good Practice

Published by Oil & Gas UK • https://oilandgasuk.co.uk/product/

flexible-pipe-integrity-management-guidance-good-practice-sureflex-jip/

JIP publication

Flexible pipe population statistics

15,341

11,111

3,516

365

0.01

0.1

1

10

100

1000

10000

100000

1970 1975 1980 1985 1990 1995 2000 2005 2010 2015 2020

Tota

l Fle

xibl

e Pi

pe L

engt

h M

anuf

actu

red

(km

)

Year

All Pipe

Flowlines

Risers

Jumpers

Cumulative manufactured length • flowlines, risers, jumpers

0

2500

5000

7500

10000

12500

15000

0 2 4 6 8 10 12 14 16 18 20

Desi

gn P

ress

ure

(psi

)

Inner Diameter (inch)

Pressure x ID Experience

Pressure x ID 30k

Pressure x ID 50k

Pressure x ID 70k

Pressure x ID 90k

Example population statistics

Example population statistics

17.3

%

21.5

%

3.8%

7.9%

3.4% 5.

4%

4.4%

10.1

%

4.3%

12.4

%

0.9%

4.4%

2.2%

1.8%

0.0%

0.1%

0.0%

0.0%

0%

5%

10%

15%

20%

25%

30%

0 to

100

100

to 2

00

200

to 3

00

300

to 4

00

400

to 5

00

500

to 7

50

750

to 1

000

1000

to 1

250

1250

to 1

500

1500

to 1

750

1750

to 2

000

2000

to 2

250

2250

to 2

500

2500

to 2

750

2750

to 3

000

3000

to 3

250

3250

to 3

500

over

350

0

Popu

latio

n (%

)

Range, Design Water Depth (m)

• Damage and failure categorised in full, by; – 37 separate damage / failure causes – 8 separate status criteria;

• e.g. damaged, leak, minor defect, shutdown, rupture • Biggest drivers (in grouped / consolidated causes)

Damage and failure experience – biggest drivers

Damage and failure statistics

1.E-05

1.E-04

1.E-03

1.E-02

1976

-198

119

81-1

986

1986

-199

119

91-1

996

1996

-200

120

01-2

006

2006

-201

120

11-2

016

Dam

age

/ Fa

ilure

Rat

es(in

cide

nts p

er P

ipe-

Year

)

DamagedFailed - LeakFailed - Rupture

Risers

1.E-05

1.E-04

1.E-03

1.E-02

1976

-198

1

1981

-198

6

1986

-199

1

1991

-199

6

1996

-200

1

2001

-200

6

2006

-201

1

2011

-201

6

DamagedFailed - LeakFailed - Rupture

Flowlines & Jumpers

Damage and failure experience

Damage / failure rates in decline since mid ’90s • PARLOC shows that flexible pipe compares favourably

with rigid pipe based on LOC per pipe • Experience of survival in abnormal events

– e.g. excessive offsets, extreme storms

However… • Some increases in corrosion and fatigue • Rates may not have reached equilibrium • Oldest pipes age ~40yrs

– and manufactured in low numbers

• Fatigue failure in the main pipe section – Local to bend stiffener region

• Carcass tearing failures – Axial loading on carcass and axial movement relative

to outer

Failure mechanisms identified since 2010 JIP

• Smooth bore riser ruptures – Reverse permeation in pressurised J-tubes =>

internal sheath failure => inner annulus pressurised => armours overloaded

– Historical failures not previously reported / shared

Failure mechanisms identified since 2010 JIP

• Keeping the statistics up to date = > ongoing learning – Standardised reporting template created in JIP – Events can be submitted to sureflex@woodplc.com

• Sureflex Network, ongoing initiative to – Capture and maintain damage / failure statistics – Share global

lessons learned

Experience since the JIP, and the future

• Some additional events since the JIP completion

Experience since the JIP, and the future

Inspection and monitoring methods (extract)

• Workshop reviews; industry take-up, feedback, TRL – ~35 technologies reviewed

• Per technology; benefits, limitations, procedure, industry practice, and guidance notes

Failure rates in decline since the mid-1990s • Incident rates may not have reached equilibrium • New failure modes are still being discovered • Flow induced pulsations, can represent significant vibration /

fatigue threat in connected pipework

Experience confirms good degree of robustness • Extreme storm and abnormal event survival

Inspection and monitoring technologies • Vendors continue to develop and extend capabilities

Recommend statistics kept up to date and shared • Standardised reporting template created • Sureflex Network with ongoing sharing

Key conclusions and recommendations

Thank you. Questions?

To request standard reporting template, contact:

– sureflex@woodplc.com