FSO Cidade de Macae MV15 External Turret
Scope of Work
SOFEC designed, constructed and supplied an external turret mooring system to moor a 350,000 dwt MODEC-converted FSO vessel to receive, store and offload oil produced by the PRA-1 Platform and nearby oil fields in the Campos Basin, Brazil.
General Description
| Client Name: | Petroleo Brasileiro S.A.(Petrobras) |
| Contract Award: | December 2005 |
| Installation Date: | April 2007 |
| First Oil: | November 2007 |
| Vessel Size: | 350,000 dwt (approx.) |
| Storage Capacity: | 2,200,000 bbls |
| Water Depth: | 95m (311ft) |
| Supply / Fabrication: | Turret - Malaysia Vessel - Singapore |
Design Environmental Criteria
100-year storm
| Significant Wave Height: | 7.8m (26ft) |
| Wind Velocity: | 29m/s (56.4 knots) |
| Surface Current: | 2m/s (3.9 knots) |
Mooring System
Turrets
12-leg 3 x 4 chain catenary mooring system
4.75-in. R3 chains and drag anchors
The SOFEC® external turret mooring system provides a safe and reliable means of mooring the FSO on station in the PRA-1 field for the entire 20-year service life of the FSO, in all sea conditions including the 100-year storm. The riser system must remain undamaged in the 100-year storm. The SOFEC® external turret mooring system will load and offload crude simultaneously.
Fluid Swivel Assembly
| Production: | 5 x 16-in. nominal toroid fluid swivel (Class 900) |
| Gas Import/Export: | 1 x 4-in. nominal toroid inline swivel (Class 1500) |
| Utility: | Drains, air, etc. |
| Electrical Swivel: | 4 circuit 13.8 kV x 30 MW power slip ring with signal and controls |
| Optical Swivel: | Fiber optic slip ring included |
Riser System
7 x 12-in. cargo oil risers
1 x 4-in. import fuel gas riser
4 x power umbilicals
Comments
This unique SOFEC external turret mooring system is ABS classed.