Sureflex JIP - sharing the latest flexible pipe integrity ... ian m… · PowerPoint 16:9...
Transcript of Sureflex JIP - sharing the latest flexible pipe integrity ... ian m… · PowerPoint 16:9...
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Sureflex JIP - sharing the latest flexible pipe integrity management guidance and operational experience Subsea Expo, AECC, 8th February 2018 Ian Macleod, Engineering Manager
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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)
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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
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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
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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
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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
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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)
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• 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
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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
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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
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• 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
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• 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
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• Keeping the statistics up to date = > ongoing learning – Standardised reporting template created in JIP – Events can be submitted to [email protected]
• Sureflex Network, ongoing initiative to – Capture and maintain damage / failure statistics – Share global
lessons learned
Experience since the JIP, and the future
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• Some additional events since the JIP completion
Experience since the JIP, and the future
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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
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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
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Thank you. Questions?
To request standard reporting template, contact: