Allseas’ Pieter Schelte Wins Its First Contract

Shell U.K. Ltd has awarded the Swiss – based Allseas Group S.A. the contract for the removal, transportation and load-in to shore of the topsides of three of its Brent platforms, with an option to do the same with the fourth platform.

The Brent contract is the first to be awarded to Allseas for Pieter Schelte, Allseas’ dynamically positioned single – lift installation/decommissioning and pipelay vessel, which is currently under construction at Daewoo Shipbuilding and Marine Engineering (DSME) in Okpo, Korea.

The contract also includes the removal of Brent Alpha’s steel jacket. The Brent field is situated on the UK Continental Shelf, 186 km (116 miles) north-east of Lerwick, Scotland, in a water depth of 140m (460 ft). The field comprises four large platforms: Alpha ( a steel jacket ), Bravo, Charlie and Delta (concrete gravity – based structures), with topside weights ranging from 16,000 to 30,000 t.

Removals begin with Brent Delta in 2015/16, and the remaining topsides over the ensuing eight years with dates to be confirmed.

Pieter Schelte, with a length of 382 m and width of 124 m, will have a topsides lift capacity of 48,000 t and a jacket lift capacity of 25,000 t.

DSME won the Allseas project in 2010 and it will be the world’s biggest platform decommissioning and pipe laying vessel. The total weight will be approximately 240,000 tons. After delivery, its name will enter the Guinness Book of Records as the biggest vessel in the world.

With a total building sum of over 1.3 billion Euros (approx $1.7 Bln) it will be the biggest project ever constructed at DSME’s Okpo shipyard.

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Source: allseas, August 5, 2013