If power is lost to a DPS-controlled drill-ship’s thrusters there is a risk that the rig will drift off its position, which can potentially give rise to huge impacts and the risk of damage to the subsea equipment (Blow Out Preventer (BOP), Riser, and associated equipment). Along with such an unfortunate occurance also will come significant financial impacts; the cost of repairs, new equipment and lost day rates. Clearly, in the event of a power loss, the speed of engine re-start is of critical important.
Drill-ship building scene: Photo courtesy of Maersk Drilling
Since 2011 Maersk Drilling has invested USD 4.5 billion in seven new drilling units; three ultra harsh environment jack-ups at Keppel FELS in Singapore and four ultra deepwater drill-ships at Samsung Heavy Industries in South Korea. In the design of the drill-ships’ electrical propulsion system, Maersk say that their engineers, set the engine emergency start-up time bar higher, looking for a decrease in the usual ... [More]
Swire Blue Ocean provides services to the offshore wind industry and its newest vessel, the state-of-the-art PACIFIC ORCA, was christened end of 2012 in Copenhagen. Built in Korea by Samsung over 1½ years, the 8 x MAN 9L27/38 GenSets for diesel-electric propulsion were built by Doosan. The subsequent trip from Korea to Denmark took 80 days.
Pacific Orca is the world’s most modern WIV with an overall length of 160.9 m, a breadth of 49.0 m, and a speed of 13.0 knots. The ship is designed to transport up to 12 × 3.6 MW disassembled off-shore windmills and its main crane has a maximal capacity of 1,200 tons. Lars Blicher, General Manager & Director of Danish Swire Blue Ocean A/S, states: “The engines are hugely important as we have to be able to rely on them. They are diesel-electrics so, if any fail, we have others to take over. We opted to put identical engines in the ship to make life easier when it comes to spare parts and maintenance.” He cont... [More]
Boat mooring maintenance; dredging operations; dive and civil engineering work; cable and pipe laying; a floating crane platform to get in where larger, deeper-draft vessels are denied access – all are within the scope of a multi-purpose, Jack-of-All-Trades workboat from UK shipbuilders Meercat Workboats. In addition, this workboat is fully transportable by road trailer.
Workboat 'Skua': Photo credit Meercat Workboats
Recently Meercat delivered their first asymmetric workboat prototype ‘Skua’ (twin-hulled with 3m and 4m hulls on starboard and port sides respectively) to Matt and Paul Dorman, principals of specialised mooring contractors Strangford Moorings in Northern Ireland, who specifically needed a 7.5 tonne winch and bow-roller to be permanently rigged on the centre-line in addition to a powerful ‘Iron Fist’ 40 tonne / metre marine deck crane. ‘Assymmetric’ as different length custom-built hulls turned out to be the only way to achie... [More]