Island Offshore Opts for Ulstein Vessel

Ulstein contracts with Island Offshore & their American partner Edison Chouest Offshore for delivery of a multifunctional OSV.

The offshore vessel is based on ULSTEIN’s SX121 design, prepared and tailored for the well intervention, IMR and SURF segments, and meets the latest requirements for both well intervention and offshore construction work. The newbuild is scheduled for delivery in May 2014.

 The ship will be based on the proven and solid SX121 design, a platform on which ULSTEIN has previously built five ships. She will be customised to meet Island Offshore’s functional requirements and wishes, which are based on their experience from the type of operations the vessel will be performing.

The 130 metre long and 25 metre wide ship will have the highest standard of dynamic positioning (DP3) and will be equipped to perform subsea operations at depths down to 3000 metres. The vessel can be rigged for well intervention and is prepared for the laying of flexible pipes and cables on the seabed through a VLS tower (vertical lay system). It also has room for a rotating carousel below deck with a capacity to load 2500 tons.



An active heave compensated (AHC) offshore crane with a 250-ton capacity at 14 metres outreach and a below-deck winch will be installed on board. The vessel will carry two deep-sea work ROVs (remotely operated vehicle), one to be launched from the starboard side and one through the vessel’s moon pool. The ship is designed with a large cargo deck for transport of equipment for a multitude of operations. She will be equipped with diesel electric propulsion and three azimuth main thrusters powered by six large generator sets. 



The vessel with a crew capacity of 130 will be built in accordance with the latest international environmental and safety requirements and will meet the most stringent HSE requirements on the Norwegian continental shelf as well as regulations for floating oil and gas installations. Consequently, the ship also complies with the ESD requirements (Emergency Shut-Down). In the event of evacuation, both the starboard and port side life boat can accommodate the entire crew.