Jumbo Offshore to carry out subsea installation projectåWritten by
Jumbo Offshore’s DP2 offshore heavy lift vessel Fairplayer will next month install four subsea protection structures for production flowlines at 600 m water depth in the Laggan & Tormore fields. These gas condensate fields, owned by Total and Dong Energy, are located 125 km north-west of the Shetland Islands. This region contains approx. 17 percent of remaining U.K. oil and gas reserves.
Jumbo Offshore is peforming the installation under a subcontract, commissioned by Allseas. The work combines transportation and installation, Jumbo Offshore’s hallmark specialities.
The fields’ subsea production and pipeline system is the deepest system in U.K. waters and includes two 18-inch production flowlines. The flowlines will connect the subsea production facilities to the onshore processing terminal at Sullom Voe (Shetland). The two flowlines require protection structures at the Tormore starting point and at the Laggan tie-in location.
HLV Fairplayer will mobilize in Rotterdam, taking onboard temporary accommodation units (max. 65 persons) and preparing its Deepwater Deployment System (DDS). The four production structures (composed of six elements) vary in weight from 180 t to 270 t and measure 38 x 21 x 6 m. Fairplayer will make two consecutive trips. Each trip Jumbo will transport and install two structures in three lifts. Using its DDS, the structures will be installed at 600 m water depth in a single voyage.
Jumbo Offshore says theLaggan & Tormore subsea installation project confirms its “added-value concept'” of providing a single solution for loading, transporting and installing subsea structures in water depths up to 3,000 m. Once again, Fairplayer’s DP2 capabilities, Deepwater Deployment System and twin 900 t mast cranes are proving to be constructive to a high-technology offshore project.
After project completion Jumbo plans to keep HLV Fairplayer in the North Sea area for other installation opportunities.
April 27, 2011
Leave a Reply
You must be logged in to post a comment.