Bundles and towed installation
Bundles and towed installation
25
INTERMEDIATE STRUCTURES
Intermediate structures can be incorporated within a bundle for future tie-ins. The above slide shows the intermediate structure in the Britannia bundle during launching with its integrated protection structure in place.
INTEGRATEDDYNAMICRISERS
INTEGRATED DYNAMIC RISERS
FPSO turret
Mid-water arch buoyancy units
Risers
Tether
Elevation – installed risers
Towhead structure
Buoyancy units
45 m (150 ft)
45 m (150 ft)
50 m (165 ft)
Plan – tow-out storage position
By connecting flexible dynamic risers to flowline bundle towhead structures prior to transportation to the field, significant cost savings can be achieved. Riser connections can be made onshore, eliminating the need for subsea activity and DSVs Steep riser configurations can be used if the towhead structure is utilised as a riser/tether gravity base, resulting in reduced lengths of flexible risers
Made with FlippingBook Annual report