Ulstein has received an order from Island Offshore and its US-based partner Edison Chouest for construction of a multifunctional offshore vessel of the SX121 design.
The vessel will conform to well intervention, IMR and SURF segments, be equipped for use in both well invention and offshore construction work applications and capable of operating at subsea depths of 3,000m.
The 130m-long and 25m-wide ship will feature the highest standard of dynamic positioning (DP3) and have the capacity to accommodate 130 people.
Ulstein will install a 250t capacity active heave compensated (AHC) offshore crane at 14 metres outreach and a below-deck winch on the vessel.
Equipped with a room to house a rotating carousel below deck, with a capacity to load 2,500t, the vessel can lay flexible pipes and cables on the seabed through a VLS tower.
In addition, there will be two deep-sea remotely operated vehicles (ROVs), one to be launched from the starboard side and the other through vessel’s moon pool. The ship will feature a large cargo deck for transporting equipment to carry out different operations.
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Ulstein will equip the vessel with diesel electric propulsion and three azimuth main thrusters, which will be powered by six large generator sets.
The vessel will be developed in line with the latest international environmental and safety regulations, HSE requirements on the Norwegian continental shelf and floating oil and gas installations regulations.
As part of the contract, which also includes an option to build an additional vessel, Ulstein will deliver the new offshore vessel in May 2014.
Image: Ulstein has received an order from Island Offshore for a multifunctional offshore vessel of SX121 design. Photo courtesy of Ulstein.