Download Seven Arctic

Seven
Arctic
Heavy Construction/
Flex-lay
The Seven Arctic will be a highly capable construction vessel for
worldwide operations. This new Heavy Construction Flex-lay vessel
features a 900t offshore crane and a 325t top-tension Vertical Lay
System with 7,000t of underdeck storage.
• Length 162.3m x breadth 32.0m
• 900t AHC Offshore Crane
• 325t top-tension Vertical Lay System
• 7,000t underdeck basket for storage of flexible pipe/umbilicals
• Accommodation for 132 persons
• Deck Area c. 2,600m²
• DP Class 3 with two engine rooms
• Deck load of 4,500t at 5m above main deck
• Special Purpose Ship code compliant
• Transit speed 15 knots
• Adapted for both tropical and winter environments
• Twin workclass ROVs
• Operating depth down to 3,000m
seabed-to-surface
Main Crane
The main crane is an active heavecompensated subsea construction
crane and has been specifically
selected and developed to give
outstanding flexibility and capability
for a range of different operational
requirements. To ensure maximum
efficiency, the crane can work in a
number of different modes:- 900t
triple-fall mode; 600t dual-fall deep sea
mode; 600t dual-fall standard mode;
600t dual-fall high lift mode; 300t
single-fall mode.
Aligner MBR = 6m
A&R = 360t
Retractable
Tensioner 325t
Track length = 8.4m
Basket: Radius = 26.2m
Capacity = 7,000t
Volume = 3,100m³
Moonpool
7.2 x 7.7m
Dual-Fall Deep Sea Mode
For deep sea mode, the rope-luffing
knuckle-boom design, together with
the rope capture system, allows
the two wire rope falls to be widely
separated at the surface, while the
wide twin sheave block provides
separation and anti-twisting movement
at depth. This combination of features
helps to eliminate the risk of cabling
while maintaining a manageable wire
size for more standard operations.
Seven Arctic Heavy Construction/Flex-lay vessel
Wind (knots)
Carousel and VLS; Longitudinal view
325t Vertical Lay System and 7,000t
Underdeck Basket Carousel
The vessel is fitted with a Vertical Lay System,
suitable for laying flexible flowlines and risers,
umbilicals and power cables. The four-track
tensioner is retractable to facilitate passing large
pipe-end fittings and other structures. Product
can be loaded into the underdeck basket through
one of two loading hatches. The aft deck of the
vessel is suitably strengthened to accommodate
an optional 3,000t capacity deck carousel or a
multi-reel drive system.
Surface current = 2.0 knots
Dynamic Positioning
The thruster configuration, in
conjunction with the main propulsion
shafts and CP propellers, affords the
vessel a position-keeping capability
able to withstand harsh operating
conditions. The vessel has DP
Class III and DP Class II notation,
allowing different environmental limits
depending on the requirements of the
operation being undertaken.
Wind
Speed
(knots)
Sig.
Wave
Height
(m)
10
1.8
20
3.3
30
5.2
40
7.5
50
10.1
seabed-to-surface
General Information
Type
Classification
Built
Flag
Year Built
Principal Dimensions
Length Overall (m)
Breadth (m)
Depth Main Deck (m)
Operating Draught (m)
Transit Speed (knots)
Heavy Construction/Flex-lay
Lloyds Register, X100A1, Offshore
Supply Ship, LA, Helicopter
Landing Area, WDL(+), ShipRight
(ACS(B)), *IWS, ECO(IHM, OW, P),
ICE Class 1D FS, Winterisation
H(-30) C(-30), XLMC, CAC 3,
UMS, DP(AAA), Descriptive note
ShipRight (BWMP(method)), SPS
Hyundai Heavy Industries, 2016
Isle of Man
Delivery due 2016
162.3m
32.0m
13.5m
8.5m
15 knots
Dynamic Positioning Systems
DP Classification
DP Class III
DP HIL Certification
Reference System
2x taut wires, 3x Veripos DGNSS,
2x HiPAP 500, 1x CY Scan
Power and Propulsion
Engine Rooms
Main Engines
Power (kW)
2
6 x HiMSEN 9H32
4,275kW
Generators
6 x TBC
Power4,125kW
Propulsion
2 x Controllable pitch propeller
shafts
Power9,200kW
Thrusters
4 x Tunnel Thruster (2 Fwd, 2 Aft)
Power2,600kW
Azimuths
2 x Retractable Azimuth Thruster
(Fwd)
Power2,300kW
Main Deck
Clear Deck Area
Deck Strength
Accommodation
Berths (No.)
Cabins (No.)
2,600m²
15t/m² aft of main crane
10t/m² elsewhere
132
50x single cabins
41x double cabins
Ice and Winterisation
Features include hull plate strengthening
Trace heating of helideck, lifeboat, and other critical areas
Tank heating of fresh water tanks, and other measures
www.subsea7.com
© Subsea 7, 2014. Information correct at time of going to press.
March 2014
Seven Arctic
Tank Capacities (100%)
Fuel Oil (m³)
Fresh Water (m³)
Ballast Water (m³)
Anti-Heel Tanks
Anti-Roll Tanks
Helideck
Type
3,700m³
1,300m³
7,400m³
3,000m³
1,800m³
NORSOK Compliant Suitable for
Sikorsky S-92 / AugustaWestland
AW101, c/w Helicopter Monitoring
System
Cranes
Main Crane Capacity (t)
900t @ 20m
600t @ 30m
300t @ 53m
ManufacturerHuisman
Operating Water Depth (m) 3,000m
Main Lift Wire 6,350m / 109mm
AHCYes
Location
Main deck, port side
Auxiliary Hoist
40t at 58m, certified for manriding
Auxiliary Cranes (t)
1x 100t AHC at 15m
1x 25t AHC at 15m
Operating Water Depth
3,000m
Location
Main deck, starboard side
Moonpool
Number1
Dimensions: 7.7m x 7.2m
Vertical Lay System
Tensioners1
Dynamic Top Tension
325t
A&R Capacity
360t
A&R Wire Length
3,000m
Hang Off Clamp
360t
Underdeck Basket
Capacity7,000t
Volumec.3,100m³
Outer Wall Diameter (inner) 26.2m
ROV System
ROVs
2x WROV
Operating Depth (m)
3,000m
Installed in ROV hangar, port and starboard side at aft end of
superstructure, deployed over the side on rail-guided cursors.
ROV control room, workshops and stores fully integrated into
the vessel.
Environmental
Hull form and propulsion arrangement optimised to reduce fuel
consumption
Waste heat recovery system fitted
SCR equipment installed in exhaust to reduce NOx emissions
Ballast water treatment system installed to protect biodiversity