FINLAND
Aker Arctic working with two new types of ice-class tanker
from St Petersburg-based Admiralty Shipyards for the design and classification of two 70,000dwt Arctic shuttle tankers, to be built according to the Aker/ABB double-acting tanker (DAT) concept, whereby a ship sails stern-first into heavy ice, with its azimuthing drives turned through 180deg. The contract for these ships (reported in The Naval Architect September 2005, page 6), which are planned for the Prirazlomnoye oil field off Russia's northern coast, was originally placed by ZAO Sevmorneftegaz. This company holds the licence to exploit the field, which is located 60km offshore in the Barents Sea. Today, Gazprom owns Sevmorneftegaz. These tankers, the largest so far to be constructed by Admiralty Shipyards, follow the somewhat larger double-acting Aframax pair built by Sumitomo for Fortum (Mastera, presented in Significant Ships of 2003). They are being specifically designed to operate independently between the offshore oil production platform and a transhipment terminal in the Murmansk area. They will carry the Russian flag and will be classed with the Russian Maritime Register of Shipping, including ice class JIU6. Although these are the largest tankers at Admiralty, this yard has a bank of experience from building six smaller Arctic tankers of the Astrakhan type (Significant Ships of 2000). The tankers are to have an overall length of 263m, a length between perpendiculars of 236m, a breadth of 34m, a depth of 21m, and a draught of 13.6m. The diesel-electric power plant will consist of four main diesel generators providing a total power of 25MW, supplying current to twin azimuthing pods (possibly ABB Azipods, although at the time of writing, a contract has not yet been concluded).
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Each ship will be fitted with a dynamic positioning system, a helicopter deck, and a bow loading facility designed specifically for the demanding Arctic conditions of the area. Original delivery dates were to be 2007 and 2008, but these are now understood to have been put back to match completion of the Prirazlomnoye production platform. An order for transporting oil from Prirazlomnoye was granted in October to Russia's biggest shipping company, JSC Sovcomflot. The planned production capacity at Prirazlomnoye is 6.5 million tonnes annually (133,000 barrels daily).
More Arctic tankers from Samsung In November last year, more welcome work was secured by Aker Arctic Technology in association with Sovcomflot's order at Samsung Heavy Industries for the construction of three further ice- class Arctic shuttle tankers, also of 70,000dwt. These tankers, worth together US$430 million, are intended for a practically independent shuttle operation between the Varandei terminal in the Pechora Sea and Murmansk, for export of crude oil from onshore oil fields jointly owned by Lukoil and ConocoPhillips. In November, Sovcomflot secured the transportation contract
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AST August, Aker Arctic Technology announced that it had won a significant order
An updated profile of the new Gazprom tankers to be built by Admiralty Shipyards.
A profile of the 70,000dwt tankers ordered by Sovcomflot at Samsung and intended for exporting crude oil from the Varandei terminal. This illustration shows the sharply cutaway bow - these ships will not be double-acting. Aker Arctic Technology will assist Samsung with the design.
Electrical system diagram for the Sovcomflot diesel-electric tankers, which will feature twin 10MW Azipod drives.
for this oil. Intended peak production from the joint-venture fields is 200,000 barrels/day, approximately 10 million tonnes annually. Although of the same size as the Gazprom ships
at Admiralty Shipyards, these vessels will not be double-acting; instead, they will have an icebreaking bow and a hull form which will allow them to deal with ice up to 1.5m thick both ahead and astern. They are based on a conceptual design developed by Aker Arctic Technology, and Samsung will work under a cooperation and licence agreement with Aker Arctic, according to which the Finnish company supports the Korean yard in designing and constructing the vessels. The three tankers are due to be delivered at the end of 2007, spring 2008, and spring 2009. Plans are in hand to order a possible fourth vessel later. The ships will be built to ABS class, except the hull, which will comply with Russian Maritime Register of Shipping ice class JIU6 standards.
They will carry the Russian flag, and each will be equipped with twin 10MW ABB Azipod drives supplied by diesel-alternator sets having a total power of 24MW.
Dynamic positioning systems will be installed, together with a helipad and an Arctic bow loading system. The overall length will be 256m, the moulded breadth will be 34m, and the draught 14m. A new loading platform for the Varandei terminal is currently being built in Kaliningrad by Lukoil; this is to be placed 20km off the coast and linked to shore by a 0.82m diameter pipeline. In addition to the two 10MW Azipod propulsion units, ABB deliveries for each ship will include three main alternators (two x 11,000kW and one x 4200kW), a main switchboard, two propulsion transformers, two high-voltage distribution transformers for the propulsion drives, also propulsion and remote control systems.
THE NAVALARCHITECT FEBRUARY 2006
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