DANISH group Dong Energy has chartered two jack-up offshore construction units to install wind turbines in the UK side of the Irish Sea from Oslo-listed Seajacks International. The Seajacks Leviathan and Seajacks Kraken would work for Dong from 2010 for a total of at least 18 months under a $79m contract. Both self-propelled jack-ups would be installing turbines on two phases of the Walney windfarm project in the next three years. Bermuda-based Seajacks said the Seajacks Kraken would start a 15 month period from June 2010 and Seajacks Leviathan would commence a three-month charter from May 2011. Seajacks Managing Director Blair Ainslie said both jack-ups were designed to operate off north west Europe for the offshore windfarm industry. Both jack-ups were built at Lamprell’s yard in the United Arab Emirates. Seajacks Kraken was launched in February this year and was mobilised to Canada. It is working for ExxonMobil for five months at the Sable gas platforms off Nova Scotia and would need to be mobilised back to the UK next year. The Seajacks Leviathan was launched this month and is due to be delivered soon, ready to be mobilised to the UK. It has a 15-month contract with UK contractor Fluor to install wind turbines on the Greater Gabbard windfarm project off the Essex coast from September this year. The Dong contract comes just a day after the Danish energy group gained approval for its DKr700m ($131m) takeover offer for offshore vessel owner A2Sea. The deal, backed by A2Sea investors, would give the Dong ownership of two offshore construction vessels and two jack-up barges.