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. | DeepOcean new SURF vessel Artist’s impression of the new SURF vessel. |
The new vessel, which includes a 150-ton dual tensioner vertical lay system and a 3,000-ton carousel situated below deck, is designed for installation of flexible flowlines, risers, and umbilicals. One feature differentiating it from competing ships in this market is its 400-ton active heave compensated knuckle boom main crane, which has extended reach and can lift 600 tons in double fall mode. It also deploys fuel-saving Siemens BlueDrive PlusC propulsion control technology and a DP-3 positioning system.
This will be the largest vessel in the company’s fleet, with a length of
149.8 m (491 ft) and a width of 27 m (88.6 ft), with about 2,300 sq m
(24,757 sq ft) of deck space to store hardware and equipment for offshore
works. A 150-metric ton (165-ton) twin tensioner vertical lay system (VLS)
laying through the work moonpool will allow efficient installation of
flexible products up to 610 mm in diameter. Also included is an A&R winch
with 185-metric ton (204-ton) capacity. Flexible products will be stored
either in the below deck carousel, which has 3,000-metric ton (3,307-ton)
capacity for long lengths if required, or on reels or a deck carousel
temporary installed on the back deck. Both VLS tensioners in the VLS are
fully retractable to provide a clear routing of termination heads in front
of the VLS Facilities include a 70-metric ton (77-ton) knuckle boom crane in addition to the 400-metric ton (441-ton) knuckle boom crane, the world’s largest to date, with the biggest reach providing a 400-metric ton offshore lift at 20 m (65.6 ft). The crane is capable of 600-metric ton (1,968-ton) lifts in double- fall mode. Two work class ROVs deployed through moonpools can ensure operations in significant wave height exceeding 6 m (19.7 ft), and will be active heave compensated at depth. These vehicles will support all subsea operations, from light touchdown monitoring- and survey-activities to heavy construction tasks. The six-engine diesel-electric system gives a total power output of 17.68 MW. The dual pitch propeller system gives the ship a minimum transit speed of 14 knots fully loaded and a maximum speed of more than 16 knots, allowing fast transits between mobilizations and offshore locations. The main propellers in combination with the five tunnel thrusters and two retractable azimuths will provide a DP-3 capability dimensioned for year-round operations in the North Sea. Siemens’ BlueDrive system, developed in co-operation with Østensjø Rederi, uses variable speed for optimal operation of diesel generators combined with batteries. It is designed to reduce fuel consumption and emissions of nitrogen oxides (NOx) and greenhouse gases (CO2).
Source: Tom Nightingale, Marketing
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