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]