BASIS OF REQUIREMENT FOR A FLEXIBLE DYNAMIC RISER AS LINK BETWEEN SEABED AND FLOATER Max Horizontal Excursion - 25m
POINT M - MEAN POSITION OF TURRET BOTTOM POINT A - BOTTOM DOWN MAX EXCURSION OF TURRET BOTTOM POINT B - TOP UP MAX EXCURSION OF TURRET BOTTOM
+ 25m
B
Max Vertical Excursion
Up 8m Down 10m
M A
RISER CATENARY SECTION (this provides reservoir of length to cope with the FPSO movements RISER TENSION SECTION
NOTE - IN TOP UP POSITION THE RISER IS ALMOST STRAIGHT. IN BOTTOM DOWN THE RISER IS ALMOST TOUCHING THE SEABED
FLEXIBLE PIPE STRUCTURE
Coflexip Pipe
BASIC PRODUCTION FROM STEEL TAPES AND EXTRUDED PLASTIC
FLEXIBLES CONFIGURATIONS STANDARD RISER CONFIGURATIONS
FREE HANGING
LAZY S
STEEP S
STEEP WAVE
Risers for Floating Production Semi
LAZY WAVE
Flexible pipe design and analysis data specifications - Typical data required
TECHNIP (Coflexip)
– France – Brazil – Angola – Malaysis
WELLSTREAM
– Newcastle – Florida
NKT
– Denmark
MANUFACTURERS OF FLEXIBLE PIPE / RISERS
Manufacturing Process - Wellstream Ltd, Newcastle Hydro Test Bays
Extrusion
Insulation Pipe Completion
Tensile Armour Extrusion
Pressure Armour
Carcass
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 SemiSubmersible, Snorre TLP and Snorre Subsea Production Systems operating in Norway
Anasuria FPSO with Multiple Risers
POSSIBLE MEASUREMENT APPROACHES Monitor Riser Motions Monitor Shape and Spatial Position of Riser Monitor Roundness of Inner Bore Monitor Presence and Integrity of Buoyancy Monitor Acoustic and Vibration Signature Leak Detection
Monitor Touchdown and Seabed Interface
INTEGRITY ASSESSMENT AND MONITORING OF FLEXIBLES
FLEXIBLE PIPE Deepwater Solution - Integrated Production Bundle - Hot Water External Plastic Sheath Thermal Insulation Tubes CSOfor Patent Hot Water or/and Gas Lift
Flexible Riser Structure
GIRASSOL RISER TOWERS
RISER TOWER DETAILS
SLOR RISERS The 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 offtake assembly is connected to a flowline via rigid jumper.
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 offtake assembly. The bottom assembly connection to the foundation pile is achieved by roto-latch (or any flex element) or using a tapered stress joint.
STEEL CATENARY RISERS
500 FT REGION WITH VIV SUPPRESSION STRAKES
LMS
HULL RISER PIPING
FLEX JOINTS
TENDONS
STEEL CATENARY RISERS
FIRST USE OF SCRs
“AUGER” STEEL CATENARY RISERS
TOU
CHD OW
NR
E GI ON (2
860
FT W
ATE
RD
E PT
H)
FIRST USE OF SCR’s ON A PRODUCTION SEMISUBMERSIBLE (P 18 Semi in Brazilian water)
FIRST USE OF SCR’s FROM A FPSO (Bonga FPSO - Nigeria)
