L7 - RISERS

RIGID RISER - FOR PLATFORMS

FLEXIBLE DYNAMIC RISERS

– DESIGN

– MANUFACTURING

– TESTING

– ATTACHMENTS

– FIELD EXAMPLES

– DEEPWATER REQUIREMENTS

STEEL CATENARY RISERS

– FIELD EXAMPLES

RISER TOWERS

– FIELD EXAMPLES

RIGID RISERS

‘J’ TUBE‘I’ TUBE

PRE-INSTALLED RIGID RISER COMPONENTS

RIGID RISERS AS PART OF JACKET CONSTRUCTION

RIGID PRODUCTION & DRILLING RISERS ON PLATFORM

SEMISUBMERSIBLE

PRODUCTION PLATFORM

piping

risers

turret

Mooring lines

Turret with Swivel stack

Guide tube

Riser hang-off

Flexible R

iser in a Lazy W

ave

FPSO

Mooring lines

Flexible R

iser in a Lazy S

Mooring lines

Mooring lines

MIDWATER ARCH – BUOYANCY TANKS TETHERED TO SEABED

DISTRIBUTED BUOYANCY FROM FOAM BLOCKS ALONG RISER

FLEXIBLE DYNAMIC RISERS

ARGYLE FIELD – SEMI WITH RIGID RISER

BASIS OF REQUIREMENT FOR A FLEXIBLE DYNAMIC RISER AS LINK BETWEEN SEABED AND FLOATER

+ 25m- 25m

Max Horizontal Excursion

Down 10m

Max Vertical Excursion

A

BPOINT M - MEAN POSITION OF TURRET BOTTOM

POINT A - BOTTOM DOWN MAX EXCURSION OF TURRET BOTTOM

POINT B - TOP UP MAX EXCURSION OF TURRET BOTTOM

M

RISER CATENARY SECTION (this provides reservoir of length to cope with the FPSO movements

RISER TENSION SECTION

Up 8m

NOTE - IN TOP UP POSITION THE RISER IS ALMOST STRAIGHT.

IN BOTTOM DOWN THE RISER IS ALMOST TOUCHING THE SEABED

FLEXIBLE PIPE STRUCTURE

BASIC PRODUCTION FROM STEEL TAPES AND EXTRUDED PLASTIC

CoflexipPipe

FLEXIBLES CONFIGURATIONS

FREE HANGING STEEP S

LAZY S STEEP WAVE LAZY WAVE

STANDARD RISER CONFIGURATIONS

Risers for Floating Production Semi

Flexible pipe design and analysis data specifications- Typical data required

MANUFACTURERS OF FLEXIBLE PIPE / RISERS

TECHNIP (Coflexip) – France

– Brazil

– Angola

– Malaysis

WELLSTREAM – Newcastle

– Florida

NKT – Denmark

Manufacturing Process - Wellstream Ltd, Newcastle

Extrusion

Insulation

Tensile Armour

Pressure Armour

Carcass

Extrusion

Pipe Completion

HydroTestBays

FLEXIBLE PIPE TESTING

24-hour Hydro Test High Pressure Development - Burst Tests

FLEXIBLE DYNAMIC RISERS ON DELIVERY REELS

SPACE REQUIREMENTS FOR RISERS AND

MOORING SYSTEMS IN A FPSO TURRET

DEVICES CONNECTED OR ATTACHED TO FLEXIBLE RISERS

Snorre B Production Semi-Submersible, Snorre TLP and Snorre Subsea Production Systems operating in Norway

Anasuria FPSO with Multiple Risers

Monitor Riser Motions

Monitor Shape andSpatial Position of Riser

Monitor Roundnessof Inner Bore

Monitor Presence andIntegrity of Buoyancy

Monitor Acoustic andVibration Signature

Monitor Touchdown andSeabed Interface

Leak Detection

INTEGRITY ASSESSMENT AND MONITORING OF FLEXIBLES

POSSIBLE MEASUREMENT APPROACHES

FLEXIBLE PIPE Deepwater Solution - Integrated Production

Bundle - Hot Water

External Plastic SheathExternal Plastic Sheath

Thermal InsulationThermal Insulation

Flexible Riser Flexible Riser StructureStructure

CSO Patent Tubes forTubes forHot WaterHot Water or/and or/and Gas LiftGas Lift

GIRASSOL RISER TOWERS

RISER TOWER DETAILS

SLOR RISERSThe SLOR consists of a single vertical steel pipe connected to the foundation pile at the seabed and tensioned using a buoyancy cans at the top. The top of the buoyancy can is typically located 50-100m below the mean water level. The SLOR is generally situated 100-500m away from the vessel depending upon water depth and the vessel excursions.

The foundation pile is either suction pile, driven or drilled and grouted pile. The bottom assembly of the SLOR is connected to the foundation pile using a high integrity connector and terminated with an offtakeassembly.

The bottom assembly connection to the foundation pile is achieved by roto-latch (or any flex element) or using a tapered stress joint.

The offtake assembly is connected to a flowline via rigid jumper.

TOUCHDOWN REGION (2860 FT WATER DEPTH)

TENDONS

LMS

500 FT REGIONWITH VIV SUPPRESSION

STRAKES

HULL RISERPIPING

STEEL CATENARYRISERS

FLEX JOINTS

STEEL CATENARY RISERS

“AUGER” STEEL CATENARY RISERS

FIRST USE OF SCRs

FIRST USE OF SCR’s ON A PRODUCTION SEMI-

SUBMERSIBLE (P 18 Semi in Brazilian water)

FIRST USE OF SCR’s FROM A FPSO (Bonga FPSO - Nigeria)