Drydock, survey and extensive engine overhaul work on Rever Offshore vessels prepares them for charters in UK North Sea
UK-based Rever Offshore’s saturation diving support vessels Rever Sapphire and Rever Polaris have completed repairs and upgrades at A&P Tyne shipyard in preparation for work in the UK North Sea. Rever Offshore’s fleet consists of four specialised OSVs, which provide dive support, light construction and subsea maintenance in the North Sea sector.
Rever Sapphire underwent drydocking, survey and repairs in a month-long programme of work, which was spent in dock and alongside on the UK shipyard’s West Quay. Rever Sapphire’s swing-up thruster was repaired and its cranes upgraded as part of the scope.
Rever Polaris followed Rever Sapphire into drydock for an eight-week programme as part of its special survey docking.
Rever Polaris has an overall length of 113.5 m, beam of 22 m, depth of 9.5 m, with a clear deck area of 700 m2, 18-person dive system, a 150-tonne active heave compensation crane and accommodation for 104.
A&P Tyne’s substantial scope of work included completing a 35,000-hour overhaul of the port and starboard azimuth thrusters, rerouting external drainage for the helideck, replacing deluge pipework on the gas deck, relocating satellite tracking antenna, calibrating anchors and chains, repairing and repainting the bumper bars and bulwarks, replacing external walkway lighting and carrying out extensive reactive steel repairs.
UK-based diesel engine service company Royston completed the overhaul of diesel engines on Rever Polaris at the shipyard, disassembling the Wartsila W9L26 No 1 and No 3 diesel generators to refurbish cylinder heads, renew cylinder liner seals and overhaul pistons and connecting rods. Engineers completed deflection and bearing checks on the engines, while the fuel injection pumps were serviced, leak checked and dynamically tested and calibrated to specification. The overhaul of Napier turbochargers was also completed as part of the scheduled maintenance programme.
Following completion of the work, load testing was completed by the Royston team alongside at A&P shipyard.
Rever Offshore assets and services director Graeme Wood said, “These were two high profile and strategically important projects for Rever Offshore and A&P North East did a fantastic job in supporting us and completing an exacting programme to the very highest technical standards”.
In the UK North Sea, Rever Sapphire was deployed initially for inspection, maintenance and repair scopes including sat diving but has since changed to remotely operated vehicle survey and inspection works.
Last year, Fara Holdco Limited, the owners of the Bibby Offshore group of companies, announced a merger between Bibby Offshore and Rever Offshore AS, resulting in a rebranding as Rever Offshore. Rever Offshore’s subsidiary is CECON Contracting AS, an international subsea and offshore contractor.