Post on 14-Oct-2014
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)