News | EQUIPMENT


Repair and maintenance Miko patches


things up with NCA Te Norwegian Coastal Administration (NCA) has ordered sets of ‘Salvage’ and ‘Tanker’ magnetic patch kits from Oslo-based Miko Marine, to provide protec- tion for five NCA emergency towing vessels (ETVs) operating off the coast of Norway. The Miko Salvage and Tanker patches serve


as temporary, watertight ‘band aids’ to damages sustained by the hull, whether due to collision, corrosion or a technical defect, and to damaged tanks, thus preventing excessive oil spills in the event of an emergency. Additionally, they can be utilised to seal thruster tunnels and sea chests, thereby enabling repair and maintenance work to be conducted inside without having to incur the costs and lost time of a typical drydocking. Te patches can be ordered in a variety of sizes, the largest manufactured so far by the group being 30m by 15m. According to Miko, the adhesion works by mixing


Nitrile rubber with rare earth particles, which grant the patches a stretch strength of 9000N per 5cm. In theory, a 5cm strip has the potential to liſt a car. A typical patch weighs 10kg per m2


Power systems Wärtsilä signs


Korean rigs deal Finnish engine manufacturer Wärtsilä and Norwegian systems developer Kongsberg have been awarded contracts to supply a combination of power and positioning systems packages for two new category D semi-submersible rigs, currently under construction at Daewoo Shipbuilding and Marine Engineering (DSME), South Korea for Norway- based Songa Offshore. Te contract is the result of a letter of award for the duo from Statoil, placed in July 2011. Upon delivery, the vessels will engage in year-round drilling, completion, testing and intervention duties, on behalf of Statoil, on the Norwegian Continental Shelf. Under the terms of the deal, Wärtsilä will equip each


, and each is


complemented with an additional, laminated layer of material, to aid buoyancy, and liſting lugs, enabling divers to move the patches into position beneath the water. Te contract represents a repeat order from the


NCA, which previously used the Miko patches to assist a nuclear fuel carrier which became stricken off the coast of Norway in December 2010. www.miko.no


of the rigs with six 12-cylinder Wärtsilä 32 engines, in V-configuration with ancillaries, in addition to six Wärtsilä FS3500 main steerable thrusters. Te Finnish power specialist will also oversee integration of these systems aboard the newbuilds, and provide system back-up in the form of its in-house-developed condition monitoring tool. Te deal follows an earlier contract signed between Wärtsilä and Songa Offshore, involving the supply of eight thrusters for the semi-submersible Songa Eclipse rig. Magnus Miemois, vice president, Wärtsilä Ship


Power, Offshore, comments: “Te high efficiency enables fuel cost savings and has clear benefits in terms of reducing CO2


emissions.” Miemois


claims that the fact that the Wärtsilä 32 engines are compliant with IMO Tier II requirements played a part in the group’s selection, given the stringent environmental regulations affecting the Norwegian Continental Shelf. Meanwhile, Kongsberg will equip the vessels with


dynamic positioning (DP), thrusters control, bridge navigation, vessel automation, safety, riser manage- ment and environmental monitoring systems. Te group will complete its deliveries to the Korean yard by the end of 2012. DSME intends to deliver the vessels commenc-


Miko’s magnetic patches combine Nitrile rubber and rare earth particles, to create a cohesive, watertight patch on damaged surfaces, with a stretch strength of 9000N per 5cm.


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ing 2012, and the first of the new duo is scheduled to be operational in 2014. Each of the sister rigs will feature an overall length of 116m, a breadth of 97m, a water depth of between 100-500m and an accommodation capacity of 130 persons, and will be capable of achieving a drilling depth of 8500m. Te Wärtsilä 32 package will generate 33.6MW of power per rig, while the thrusters will generate some 24MW apiece. www.wärtsilä.com www.kongsberg.com


Offshore Marine Technology 1st Quarter 2012


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