Oil and gas engineering firm Lamprell said it was to build two further rigs for Abu Dhabi's National Drilling Company.
The company already has four of the jackup rigs under construction for the Middle Eastern company.
The latest deal will net Lamprell $166.65m, with delivery scheduled to be in the fourth quarter of 2014 and first quarter of 2015 respectively.
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The work will be performed at Lamprell's Hamriyah facility, in Sharjah in the United Arab Emirates.
"This is another significant contract award, demonstrating the health of the market for jackup rigs, and reflecting Lamprell's strong reputation for quality and service, whilst further extending our growing order book," said Chief Executive Nigel McCue.
The rigs consist of triangular hulls and three 310 foot truss type legs per rig, each leg with an electro-mechanical rack and pinion elevating system, which will allow drilling in depths of up to 200 feet of water with a rated drilling depth of 30,000 feet.
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