Chris Braithwaite, COO Wellstream International Limited · Chris Braithwaite, COO Wellstream...
Transcript of Chris Braithwaite, COO Wellstream International Limited · Chris Braithwaite, COO Wellstream...
Flowlines & Risers
Chris Braithwaite, COOWellstream International Limited
© Wellstream International Limited. Duplication in full or in part is prohibited.
Wellstream International Limited
Wellstream Snapshot
• Manufacturer of unbonded flexible flowlines & risers since 1989
– Strong #2 in industry
– HQ in Newcastle since 1996
– Bespoke technology for deepwater
– Key enabler in floating production and subsea developments
– Fast developing onshore capability - FlexSteel
– Developing installation capability
© Wellstream International Limited. Duplication in full or in part is prohibited.
– Developing installation capability
• Major exporter
– More than 90% of all output
• New plant in Niteroi, Brazil opened May 2007
• Significant R&D investment
History in North East
• Headquartered in the North East since 1996
– Corporate, technology and manufacturing global centre
– First production Dec-97
• Site selected from > 20 potential locations in Europe
• Attracted by:
– Deepwater access and heavy lift load-out capability
© Wellstream International Limited. Duplication in full or in part is prohibited.
– Deepwater access and heavy lift load-out capability
– Strong engineering & manufacturing base of North East
– Local & government support
Global Locations
Calgary
Denver
Houston Panama City
Newcastle upon Tyne
© Wellstream International Limited. Duplication in full or in part is prohibited.
Niterói, Rio de Janeiro
Perth
FlexSteelTM – Onshore Systems Manufacturing
Offshore Systems Manufacturing
Project Management & Engineering
Sales and Customer Support
Terminology – Flowlines & Risers
Jumpers
Transfer
Lines
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Flowlines
Risers
In-Field or Flowlines
• From wellhead or manifold to platform or FPSO
• Carry a mixture of oil, gas, water and sand
• Short lengths <30km
• Small diameter <12”
• Flexible or rigid or bundle
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• Flexible or rigid or bundle
• Laid by reel, J-lay, S-lay or towed methods
– Depends on cost
– Water depth, vessel availability, diameter and coating
– Many other factors
Riser Applications
• Section of line from seabed to
fixed or floating topsides
• Many types and uses:
– Drilling
– Production
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– Production
– Water injection
– Export/import
– Workover
– Control, power and chemicals
Flexible Production and Export Risers
FPSO
Storage vessel Turret with bend stiffeners
Anchor cablesCatenary riser
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Export risers(lazy wave)
Flowline risers(lazy S)
Clump weight
Tethered mid-water arch buoy
Catenary riser
Subsea manifold
Distributed buoyancy
Touchdown clamp and tether
Rigid Risers to Floating Vessels
FPSO vessel
Bare pipe Top- tensioned riser
Shuttle
W riser
SPMTurret
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Buoyantsleeves
Compliant vertical
axis riser
Lazy wave steel catenary riser
Bare pipe
Buoyantsleeves
Steel catenary
riser
riser
Hybrid Risers
Export lines from
FPSO to SPMFlexiblerisers
Buoyancy• Rigid tower
– Self-buoyant
– Minimise transfer
of load to FPSO
• Linking flexibles
• Fixed vessel orientation
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Rigidrisertower
risersorientation
– Benign conditions
Girassol fieldwith hybrid risers
and flowline bundles
Key Design Considerations
• Gross structural integrity
(tension, pressure)
• Riser interaction (clashing,
interference and
entanglement)
• Fatigue (curvature and tension
ranges)
• Local analysis
– Gap span
– Flexlok stress analysis
– Corrosion fatigue
– Material compatibility
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• Touch down point
– Abrasion
– Local armour buckling (bird-caging)
• Collapse
• On-Bottom Stability
• Upheaval Buckling
Flexible versus Rigid Solutions
FPSO
TLP / SPAR
Fixed Structure
Semi-Sub
“Dynamic” “Static”
Niche Application Low
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FLEXIBLESOLUTION
RIGIDSOLUTION
Steel Catenary
Risers
RiserTowers
Long Export Lines
Ideal for fast-track (EPS)
Re-Use
Niche Application - Dynamic
Tested prior to Delivery
Corrosion Resistant
Naturally Insulating
Congested Field Infrastructure
High Mob / De-Mob
High Installation Costs
Technically straight forward
Known Product
SubseaStep Outs Flexible Flowlines
Economic Short Lengths
Lower flexibility (not re-usable)
Low Material Cost
Lowest installed costs
Flowlines and Risers – Services and Products
PRODUCTS SERVICES
� Rigid linepipe � Pipe & Riser Installation
� Pipe coating � Project Management
� Flexibles & Bundles Raw Materials; � Design
� End fittings � Fabrication
� Ancillaries � Inspection
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� PLETs & PLEMs � Repair & Maintenance
� Pumps & Compressors � Remote Intervention
� Subsea support structures � Decommissioning
Approx. 50% of SURF spend is associated with flowlines and risers