COPENHAGEN --NKT Flexibles has been delivering subsea structures for two development projects in the North Sea.
In February 2008, Talisman Energy (UK) contracted the company for six gas-lift jumpers for the Scapa field, 161 km (100 mi) northeast of Aberdeen. The consignment comprises three 127-m (417-ft) and three 108-m (354-ft) static 3-in. (7.6-cm) jumpers connecting a new riser caisson subsea breakout with the field's subsea bundle.
This project is part of a program to upgrade the riser and subsea infrastructure associated with the Claymore platform and Scapa subsea facilities. The infrastructure in NKT's scope of work included subsea flexible tie-in spools at the platform end: new tie-in spools will connect the retrofitted riser caisson with the existing North and South Scapa bundle towheads.
For StatoilHydro's Gjoa and Visund future developments in the Norwegian sector, NKT commissioned 18 suction anchors from Bladt Industrier in Aalborg, Denmark. Eight of these structures are vertical tether anchors, and a further eight are horizontal clamp anchors. They were designed by NKT as part of the system securing the flexible pipe to the seabed to maintain the riser configuration.
The anchors, due to be delivered last month, range in diameter from 0.4-0.6 m (1.3-1.9 ft), in heights from 4.5-9.5 m (14.7-31/2 ft). The heaviest weighs around 70 metric tons (77 tons).