The latest addition to the Hallin Marine fleet of subsea operation vessels, the compact semisubmersible Derwent, was floated for final fit out at the Drydocks World yard in Nanindah, Indonesia, last month. Designed and equipped to meet current and anticipated subsea industry demand, the vessel will be ready for operation in 1Q 2013.
‘With accommodation for up to 152 personnel, she is a multi-service vessel built for complex subsea operations and work scopes that cross a wide spectrum of duties including construction support, IRM and light/medium well intervention,’ noted John Giddens, founder and group CEO of Hallin Marine, now a Superior Energy Services company.
‘CSS Derwent meets the challenges of safe deck handling with a 160t active-heave compensated guided modular handling system and a 150t crane capable of working in water depths of 3000m, supported by a dedicated 120t pallet and skidding system.
‘She is fully prepared for subsea construction operations such as the installation of subsea trees, manifolds, flowlines, umbilicals and subsea structures as well as providing support to existing fields with inspection maintenance and repair services.’
With an eye to deepwater operations, the innovative CSS design is said to deliver exceptionally stable seakeeping characteristics. A 1300m2 zone 1 rated deck and long lay down area ensure good project load carrying capacity and meet the requirements of potential hydrocarbon management, said Hallin.
Classed by ABS as a DP Class 3 MODU and with diesel electric propulsion, Derwent incorporates technology from MacGregor (lifting systems), Rolls Royce (engines and thrusters), Kongsberg (dynamic positioning) and ABB (power management).
The vessel carries two dedicated Quantum XP 225hp deepwater construction class remotely operated vehicles capable of working at 3000m water depth. Housed below deck together co-located with built-in control rooms and workshops, the ROVs can be deployed through a dedicated centreline moonpool or from a starboard side launch position.