current riser & subsea technology issues being addressed by mcs dr patrick obrien, director, mcs...
TRANSCRIPT
![Page 1: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/1.jpg)
Current Riser & Subsea Technology Issues being addressed by MCSDr Patrick O’Brien, Director, MCS
An ISO 9000 Company
PRESENTATION PREPARED FOR SUBSEA SOLUTIONS 06
11th May 2005
![Page 2: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/2.jpg)
Presentation Overview
• Fatigue of Flexible Pipe and Steel Tube Umbilical Risers– Progress on recent development work– Upcoming STU Prototype Testing
• Subsea Integrity Management– The SCRIM Joint Industry Project
• Deepwater Pipelay analysis
• MCS Pleased to Sponsor the Technical Seminar Programme for Subsea Solutions 06– Importance of Paris as a hub for West of Africa business by
our recent opening of an MCS Paris office
![Page 3: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/3.jpg)
System Architecture: Girassol Subsea
![Page 4: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/4.jpg)
Flexible Pipes and Steel Tube Umbilicals
Flexible Pipe
Steel Tube Umbilical
Integrated Production Bundle
![Page 5: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/5.jpg)
Flexible Pipes and Steel Tube Umbilicals
Flexible Pipe
Steel Tube Umbilical
• All an integral part of the SURF scope of supply
• All include helically wound components
• Friction between layers or helically wound components
• Need to model behaviour of helically wound components on a bent pipeline or umbilical
• Fatigue Design important for Risers
![Page 6: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/6.jpg)
Integrated Local-Global Modelling
• Stick-Slip Bending– Armour / tube initially sticks on reverse bending– Slip is inline with and transverse to lay-direction– Hysteretic fatigue stress
Regular Stress Cycle
-150
-100
-50
0
50
100
150
-0.1 -0.05 0 0.05 0.1
Pipe Dynamic-Curvature (rad/ m)
Wir
e S
tress (
MP
a)
![Page 7: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/7.jpg)
Flexible Pipe and STU Fatigue Design
• MCS managed programmes– Real Life JIP
• Emphasis on global analysis• Interface between global and local pipe loads
– DTI – Fatigue Analysis Tool for Flexible Pipes• Specifically established to embody methodologies
recommended by Real Life JIP• Focus on local pipe stress analysis
– Tensile armours– Pressure armours
– Fatigue Life Testing of Steel Tube Umbilicals• Jointly between MCS and COPPE• Testing of manufacturer prototypes and model calibration
![Page 8: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/8.jpg)
Wire or Tube Equations of EquilibriumHelically Wound Components
• Method of Solution– Incremental curvature determines incremental non-slip axial
stress– Incremental non-slip axial stress determines incremental
tangential shear, normal interface and tranverse shear stresses– Check Coulomb law and gradually relax stresses while retaining
equilibrium– Wire curvatures from loxidromic / geodesic equations
0,1211 tottds
d
0,2211 diffnt
0,3211 tottt
Tangential
Surface Normal
Transverse
1
2
3
![Page 9: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/9.jpg)
Friction-Induced Stress
• MCS Structural Model for Friction – Irregular LoadingWire Stress
-80
-60
-40
-20
0
20
40
60
80
100
0 10 20 30 40 50 60
Time
Str
ess
(MP
a)
Pipe Bending Curvature
-0.025
-0.02-0.015
-0.01
-0.0050
0.005
0.01
0.0150.02
0.025
0 10 20 30 40 50 60
Time (s)
Cu
rva
ture
(ra
d/s
)
Hysteresis Loop
-80
-60
-40
-20
0
20
40
60
80
100
-0.02 -0.02 -0.01 -0.01 0.00 0.01 0.01 0.02 0.02
Pipe Curvature (rad/m)
Str
ess
(MP
a)
![Page 10: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/10.jpg)
3D (out-of-plane) Irregular Seas
3D Pipe Bending in Irregular SeasHs = 2m, Tp = 13s, 15deg off-bow
Global Tension (left) and Curvature (right) Responses
1.40E+06
1.45E+06
1.50E+06
1.55E+06
1.60E+06
1.65E+06
1.70E+06
15 35 55 75 95 115
Time (s)
Ten
sio
n (
N)
-0.006
-0.004
-0.002
0
0.002
0.004
0.006
0.008
Cu
rva
ture
(ra
d/m
)
Tension Local-y Pipe Curvature Local-z Pipe Curvature
![Page 11: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/11.jpg)
Tensile Armour Stress Validation
Total Stress on I nitial I ntrados Side of PipeI nner Tensile Armour
Real Life Trial Application No. 2, Regular Wave Height = 8.5m, Period = 13.0s
450
500
550
600
650
700
750
800
850
900
-0.02 -0.015 -0.01 -0.005 0 0.005 0.01 0.015 0.02
Pipe Curvature (rad/ m)
Str
ess (
MP
a)
BFLEX
MCS
• MCS stress computed almost instantaneously from global loads
![Page 12: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/12.jpg)
Fatigue Analysis Highlights
• Closely integrated with global analysis– Takes timetraces directly from the global analysis
• Tensions & component curvatures• Regular or irregular responses
– Computes stress timetraces that are cycle (rainflow) counted
• Local analysis supports 3D bending of pipe / umbilical– Fully accounts for global directionality– Wire stress computed at several locations– Economically processes several loadcases
• Validated as part of the Real Life JIP
• Hysteresis effects applied to reduce conservatism– In either a semi-local or global analysis
![Page 13: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/13.jpg)
Hysteresis: Global Modelling
– Global modelling only takes the “plastic” slope
-150
-100
-50
0
50
100
150
-0.1 -0.05 0 0.05 0.1
Pipe Dynamic-Curvature (rad/ m)
Wir
e S
tress (
MP
a)
![Page 14: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/14.jpg)
Hysteresis
Pipe Friction Moment and its ElastoPlastic Decomposition
0.0E+00
5.0E+03
1.0E+04
1.5E+04
2.0E+04
2.5E+04
3.0E+04
3.5E+04
0 0.005 0.01 0.015 0.02 0.025 0.03
Pipe Curvature (rad/ m)
Fri
cti
on
Mom
en
t (N
m)
Basis Curve Multilinear Approx. Elastoplastic-1 Elastoplastic-2
Elastoplastic-3 Elastoplastic-4 Elastic-5
![Page 15: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/15.jpg)
Hysteresis
Hysteretic Reduction of Pipe Curvature
-0.004
-0.002
0
0.002
0.004
0.006
0.008
65 70 75 80 85 90
Time (s)
Cu
rvatu
re (
rad
/m
)
No hysteresis with Hysteresis - 50% reduction
• Improves fatigue life by factors of over 5
![Page 16: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/16.jpg)
Steel Tube Umbilical X-Section Analysis
• Similar Issues to Flexible Pipe Technology
– Helically Wound Components (Tubes/Armour Wires)
– Slip / No-Slip of Tubes
– Hysteresis Effects
– Complex 3D Global Motions / Loads
– Friction Issues
– Identical approach to global fatigue analysis
![Page 17: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/17.jpg)
Steel Tube Umbilicals
• Some Key Differences to Flexible Pipe Technology
– Much Smaller Lay Angles (2º to 10º)
– More Complex and varied Cross-Sections
– Complex Contact Pressure Scenarios
– More Prone to Disorientation
![Page 18: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/18.jpg)
MCS STU Technology Development
• Research Project – Fatigue Life Testing of Steel Tube Umbilicals
• Joint Project between MCS and COPPE
– COPPE - Graduate School and Research Institute from the Federal University of Rio de Janeiro
• Funding by Petrobras and Brazilian Government
• STU Samples from Marine Production Systems (Oceaneering Multiflex) and Prysmian (Pirelli)
![Page 19: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/19.jpg)
COPPE Test Rig
•Bosch-Rexroth Hydraulic System
•Tension Capacity of 225 ton
•Max Bending Moment of 200 ton.m
•Angle Range from -15° to +30°
•Sample maximum length of 12m
•Variable Tension Loads
•In or Out of Phase Load Combinations
•Full Instrumentation
•Continuous Monitoring
![Page 20: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/20.jpg)
Summary of STU Research Project
• Full Scale Dynamic Test of Two Samples
– Using COPPE’s test rig in Rio
• Global and Local Numerical Modelling of STUs
• Calibrate MCS Cross-Section Models against Test Results
• Preliminary Guidelines for Fatigue Analysis of STUs
![Page 21: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/21.jpg)
Summary of STU Research Project (cont.)
• Project Schedule
– 12 month schedule
– May ’06 to April ‘07
• Deliverables
– Qualify Two STU Designs
– Gather Full Scale Test Data
– Calibrate Models
– Preliminary Guidelines
![Page 22: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/22.jpg)
Subsea Integrity Management
• Integrity management for subsea components evermore important– Deep water, remote locations: cost of
intervention– High profile failure incidents around the world
(Brazil, GOM)– Gulf of Mexico
• Hurricane conditions in excess of 1000 year event• Accelerated growth in use of Steel Catenary Risers
(SCRs) combined with uncertainty in design of SCRs• Regulator framework for riser CVA from the MMS• All leading to an increased focus on safety and integrity
![Page 23: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/23.jpg)
SCR Integrity Management (SCRIM) JIP
• Primary objectives of the SCRIM JIP have been:
– to develop a systematic methodology for the risk-based integrity management of SCR field systems.
– to investigate best technology in terms of inspection and monitoring methods for SCRs, and identify emerging technologies for SCR inspection and monitoring.
![Page 24: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/24.jpg)
SCRIM JIPPARTICIPANT STATUSOperators1. BP (Steering Committee Chair)2. ExxonMobil3. ChevronTexaco4. Petrobras5. Kerr McGee6. Anadarko7. Dominion8. BHP BillitonTransportation Companies9. WilliamsContractors10. SBMRegulators11. Minerals Management Service12. Department of TransportationComponent Suppliers13. Oil States Industries14. RTI Energy Systems15. TechlamPipe Mill16. Tenaris
![Page 25: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/25.jpg)
Deepwater Pipeline Installation Analysis
PipeLayTM
![Page 26: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/26.jpg)
Developed with the Industry
![Page 27: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/27.jpg)
State of the Art User Interface
![Page 28: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/28.jpg)
Rollerbox Modelling Options
• Range of options provided
• Simplest can be used in preliminary studies – extremely fast
• Most complex combines realistic model with fast solutions times
![Page 29: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/29.jpg)
Applications
• Deep and shallow water pipeline installation analysis
• Start-up procedures:– Sheave– Stab and hinge over– Dead man anchor
• Abandonment & Recovery
• In-line structure• SCR transfer• And more …
![Page 30: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/30.jpg)
Conclusions
• Leading Edge Fatigue Methodology for Flexible Pipe and Steel Stube Umilical Risers– Globally integrated stress methodology– Much improved interface between global and local
analyses– Numerically efficient– Generic equations to solve helically wound elements– Ongoing full scale tests to validate and calibrate
methodologies
• Subsea Integrity Mangement– Industry iniative to develop methods for SCR integrity
management
• Pipelay analysis– A new generation tool for dynamic pipelay analysis
![Page 31: Current Riser & Subsea Technology Issues being addressed by MCS Dr Patrick OBrien, Director, MCS An ISO 9000 Company PRESENTATION PREPARED FOR SUBSEA SOLUTIONS](https://reader033.vdocuments.net/reader033/viewer/2022051515/55182982550346ac318b4d8d/html5/thumbnails/31.jpg)
www.mcs.com
The End