Bundles and towed installation

Bundles and towed installation

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BRITANNIA CIRCULATION SYSTEM

ƒ Uses waste platform heat ƒ Hidden carrier corrosion

219 mm (8⅝ in) Test line 89 mm (3½ in) Methanol line 324 mm (12¾ in) Heating line and carrier annulus return 356 mm (14 in) Production

On the Britannia project, waste heat at the platform is utilised to keep warm water circulating through a dedicated 324 mm (12¾ in) pipe adjacent to the 356 mm (14 in) production flowline. At the well manifold, the slightly cooler water returns to the platform though the annulus. One difficulty with this system is that there may be hidden corrosion on the internal side of the carrier pipe. Waste heat from the platform is used to heat around 5000 m³ (1.3 · 10 6 US gallons) treated potable (fresh) water in the bundle up to 90 °C (194 °F). The system is designed to be heated up to operational requirements from cold allowing production to restart within a 24-hour period.

INSULATIONANDHEATINGSYSTEMSSUMMARY