Abu Dhabi based National Petroleum Construction Company Ltd. (NPCC) has awarded Dutch design office ‘Ulstein Sea of Solutions’ the Basic Design contract for their new large derrick pipelay vessel DLS-4200. The new vessel will be one of the biggest vessels of its kind, combining S-lay double joints pipelay operations with 4200 sT lifting capacity.
The design of the vessel is a modified version of the SOC 3000 design of Ulstein Sea of Solutions (USOS) and will be equipped with an Amclyde Model 80 crane.
Planned DP2 Upgrade
DLS-4200 is designed to operate worldwide, but will initially be equipped with a mooring system to operate in the Arabian Gulf and India. However, a future DP2 upgrade is envisaged and catered for in the design to minimise the technical impact in the future.
Main Particulars
The vessel features two fixed pitch shaft driven main propellers of 5500 kW each which will allow for a sailing speed of 12-13 knots. For future DP upgrade five (5) retractable azimuth thrusters of 3500 kW each are required.
The Amclyde main crane is capable of lifting 4200 sT (3,800 mT) at a 125 ft radius over the stern in tie-back mode and 4200 sT at 95 ft without tie-back. In full revolving mode the crane is able to lift 2950 sT (2680 mT) with an outreach of 135 ft.
Main dimensions of the vessel are:
– Loa 196.9 m
– Lpp 191.7 m
– Beam (moulded) 43.4 m
– Depth (moulded) 19.6 m
– Draught (design) 6 – 9 m
– Service speed 12-13 kn
– Installed power (moored) 4 x 5,530 kW
– Installed power (DP) 6 x 5,530 kW
Picture: Artist impression DLS-4200
Source: https://www.hme.nl/english/News/Ulstein_Sea_of_Solutions_develops_new_derrick_pipelay_vessel_for_NPCC/Default.aspx?rId=579[HME]
