FSO Ta’Kuntah External Turret
Scope of Work
The FSO Ta’Kuntah is a MODEC converted 357,000 dwt ULCC tanker with a SOFEC external turret mooring system, flexible risers connecting to the single point mooring cargo piping to the PLEM on the seabed, and an offloading system which allows the FSO Ta’Kuntah to offload tandem, side-by-side, and even simultaneously.
Since operations began in 1998, the FSO Ta’Kuntah has offloaded more than 800 million barrels of oil in the first eight years of operations without any instance of oil pollution and ‘zero’ downtime.
FSO Ta’Kuntah is located in a hurricane prone area. In two instances, partial crew evacuation was carried out due to hurricane threat but fortunately full evacuation was not necessary.
This SOFEC external turret mooring system is ABS classed.
General Description
| Client Name: | PEMEX Exploration & Production |
| Contract Award: | June 1997 |
| Installation Date: | June 1998 |
| First Oil: | August 1998 |
| Vessel Size: | 357,000 dwt |
| Storage Capacity: | 2,300,000 bbls |
| Water Depth: | 75m (246ft) |
| Fabrication: | Turret - Singapore Vessel Conversion - Singapore |
Design Environmental Criteria
100-year storm
| Significant Wave Height: | 8.6m (28.3ft) |
| Wind Velocity: | 44m/s (85.5 knots) |
| Current: | 0.6m/s (1.2 knots) |
Mooring System
Turrets
10-leg Symmetric catenary wire/chain: 123mm Spiral strand wire
6-in. Stud link ORQ
4.375-in. ORQ +20% top chain
52-in. Ø Anchor piles
External Cantilevered Bow
Fluid Swivel Assembly
| Product Fluid Swivel: | Crude oil 2 x 16-in. (250 psi design) |
| Hydraulic Utility Swivel: | 5 x 0.5-in. paths |
| By-Pass Swivel: | 24-in. 150# flange crude oil |
Riser System
2 x 16-in. Flexible risers