FPSO Whakaaropai External Turret
Scope of Work
SOFEC designed and constructed an external cantilevered bow turret for a MODEC-converted 135,510 dwt FPSO in 110m water depth. The facility is classed by Lloyd’s Register of Shipping.
General Description
| Client Name: | Shell Todd Oil Services Ltd. |
| Contract Award: | January 1995 |
| Installation Date: | August 1996 |
| First Oil: | June 1996 |
| Vessel Size: | 135,510 dwt |
| Storage Capacity: | 750,000 bbls |
| Water Depth: | 110m (361ft) |
| Fabrication: | Turret - Singapore Vessel - Singapore Topsides - Singapore |
Design Environmental Criteria
(100-year storm)
| Significant Wave Height: | 10.7m (35.1ft) |
| Wind Velocity: | 40.2m/s (74.5 knots) |
| Current: | 1.1m/s (2.2 knots) |
Mooring System
Turrets
10-leg Chain-wire-chain asymmetric catenary:
6-in. ORQ chain
4.375-in. ORQ +20% top chain
5.5-in. 6-Strand wire rope
24mt and 32mt High holding power drag embedment anchors
External Cantilevered Bow
Fluid Swivel Assembly
| Crude Oil: | 1 x 12-in. piggable toroids (680 psi design/1,025 psi test) |
| Produced Gas: | 1x 6-in. piggable in-line (2,550 psi design/3,850 psi test) |
Riser System
1 x 10.5-in. Flexible riser
1 x 4.5-in. Flexible riser