7/29/2019 Flowlines and risers

1/13

Flowlines & Risers

Chris Braithwaite, COO

Wellstream International Limited. Duplication in full or in part is prohibited.

Wellstream International Limited

7/29/2019 Flowlines and risers

2/13

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

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

7/29/2019 Flowlines and risers

3/13

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:

Dee water access and heav lift load-out ca abilit

Wellstream International Limited. Duplication in full or in part is prohibited.

Strong engineering & manufacturing base of North East

Local & government support

7/29/2019 Flowlines and risers

4/13

Global Locations

Calgary

Denver

Houston Panama City

Newcastle upon Tyne

Wellstream International Limited. Duplication in full or in part is prohibited.

Niteri, Rio de Janeiro

Perth

FlexSteelTM Onshore Systems Manufacturing

Offshore Systems Manufacturing

Project Management & Engineering

Sales and Customer Support

7/29/2019 Flowlines and risers

5/13

Terminology Flowlines & Risers

Jumpers

Transfer

Lines

Wellstream International Limited. Duplication in full or in part is prohibited.

Flowlines

Risers

7/29/2019 Flowlines and risers

6/13

In-Field or Flowlines

From wellhead or manifold to platform or FPSO

Carry a mixture of oil, gas, water and sand

Short lengths

7/29/2019 Flowlines and risers

7/13

Riser Applications

Section of line from seabed tofixed or floating topsides

Many types and uses:

Drilling

Wellstream International Limited. Duplication in full or in part is prohibited.

Water injection

Export/import

Workover

Control, power and chemicals

7/29/2019 Flowlines and risers

8/13

Flexible Production and Export Risers

FPSO

Storage vessel Turret withbend stiffeners

Anchor cables

Wellstream International Limited. Duplication in full or in part is prohibited.

Export risers(lazy wave)

Flowline risers(lazy S)

Clump weight

Tethered mid-water arch buoy

Subseamanifold

Distributedbuoyancy

Touchdownclamp and tether

7/29/2019 Flowlines and risers

9/13

Rigid Risers to Floating Vessels

FPSO vessel

Bare pipe Top- tensioned

Shuttle

W riser

SPM

Turret

Wellstream International Limited. Duplication in full or in part is prohibited.

Buoyantsleeves

Compliantvertical

axis riser

Lazy wavesteel catenary riser

Bare pipe

Buoyantsleeves

Steelcatenary

riser

7/29/2019 Flowlines and risers

10/13

Hybrid Risers

Export linesfrom

FPSO to SPMFlexiblerisers

Buoyancy Rigid tower

Self-buoyant

Minimise transfer

of load to FPSO

Linking flexibles

Fixed vessel

Wellstream International Limited. Duplication in full or in part is prohibited.

Rigidrisertower

Benign conditions

Girassol fieldwith hybrid risers

and flowline bundles

7/29/2019 Flowlines and risers

11/13

Key Design Considerations

Gross structural integrity(tension, pressure)

Riser interaction (clashing,

interference andentanglement)

Fatigue (curvature and tensionranges)

Local analysis

Gap span

Flexlok stress analysis

Corrosion fatigue

Material compatibility

Wellstream International Limited. Duplication in full or in part is prohibited.

Touch down point

Abrasion

Local armour buckling (bird-caging)

Collapse

On-Bottom Stability

Upheaval Buckling

7/29/2019 Flowlines and risers

12/13

Flexible versus Rigid Solutions

FPSO

TLP / SPAR

Fixed Structure

Semi-Sub

Dynamic Static

Wellstream International Limited. Duplication in full or in part is prohibited.

FLEXIBLESOLUTION

RIGIDSOLUTION

Steel

CatenaryRisers

RiserTowers

LongExportLines

Ideal for fast-track (EPS)

Re-Use

Niche Application

- Dynamic

Tested priorto Delivery

Corrosion Resistant

Naturally Insulating

Congested Field Infrastructure

High Mob / De-Mob

High Installation Costs

Technicallystraight forward

Known Product

Subsea

StepOutsFlexible FlowlinesEconomic Short Lengths

Lower flexibility

(not re-usable)

Material Cost

Lowestinstalled costs

7/29/2019 Flowlines and risers

13/13

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

Wellstream International Limited. Duplication in full or in part is prohibited.

PLETs & PLEMs Repair & Maintenance Pumps & Compressors Remote Intervention

Subsea support structures Decommissioning

Approx. 50% of SURF spend is associated with flowlines and risers