Island Performer for Deep-Sea Subsea Work
Posted by Irina Tabakina
The Ulstein Verft subsea newbuild, Island Performer, was delivered to Island Offshore. The flexible, state-of-the-art RLWI/IMR vessel will serve her first five years for FTO in the Gulf of Mexico.
“The vessel is customized to suit the scope of work in the FTO contract, in which RLWI (Riser-less Light Well Intervention) and IMR (Inspection/Maintenance/Repair) are the main tasks. She is able to perform operations at depths down to 3,000m, and the contracted work start at year’s end,” said Managing Director Håvard Ulstein, Island Offshore. “However, the very first assignment will be for the RogFast connection in Norway, in which the scope of work will be to investigate the sea bottom.”
“A large intervention tower is placed over the 8- x 8-meter main moon pool. She is equipped with a 250-metric-ton AHC (active heave compensated) offshore crane with a below-deck winch, and carries two deep-sea work ROVs, one to be launched through a dedicated moon pool and the other from the starboard side,” Ulstein said.
Island Performer is the next generation subsea vessel from Ulstein, with large accommodation, storage and lifting capacities. She meets the highest standards for station keeping, redundancy and dynamic positioning (DNV GL class notation DYNPOS AUTRO, equivalent to DP3). Additionally, operability in DYNPOS AUTR (DP2) operational mode is maximized due to the Operation+ feature with a three-split configuration on main machinery. This set-up allows the vessel to retain system integrity and to continue operations uninterruptedly even after a substantial single system failure.
A shelterdeck is stretching all the way past the main moon pool and aft to the main crane. This increases the operational window for moon pool work and offers a shielded space for various equipment. Arranged on the shelter deck is a multi-skidding system for handling 100-metric-ton skidding pallets. The design also includes a heavy-load cargo deck for transporting equipment for a multitude of operations and construction work.
(As published in the September 2014 edition of Marine Technology Reporter - http://www.marinetechnologynews.com/Magazine)