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'Deep Arctic'

Major seven-week maintenance programme at Damen Shiprepair Amsterdam for OSV 'Deep Arctic'

Date
February 2019
Ship name
'Deep Arctic'
Ship type
Offshore Support Vessel
Yard
Damen Shiprepair Amsterdam
Tasks performed for this project
  • Maintenance programme

In early 2019, Damen Shiprepair Amsterdam (DSAm) completed a major, seven-week, maintenance programme on the Offshore Support Vessel ‘Deep Arctic’. The 10-year old, 156-metre, TechnipFMC-owned 'Deep Arctic' came to DSAm primarily for a main class renewal (intermediate) docking, but she also required a substantial amount of maintenance. In total, 2198 work permits were issued, an indication of the large number of individual jobs that were completed and the many stakeholders involved, with the focus on the box coolers and the thrusters. As a result nearly five weeks were spent in dry dock.

Box coolers

A significant element of the project was the renewal of the steel plates on her box coolers. To achieve this the yard removed 31 separate box coolers from the forward, midships and aft sea chests. The preparations needed to accomplish this involved the disconnection of all the associated piping on both the coolers and the anodes, the removal of any associated deck plates and benches, and the installation of lifting pad eyes above the box coolers where required. Following the secure and precise removal of the coolers according to a pre-prepared lifting plan, they were placed either on the floor of the dock, on the quayside, or into shipping crates specially fabricated by DSAm for transport to the owners’ own specialists.

Once all the overhauls and inspections were completed and the coolers returned, the yard reinstalled them all. The works also meant renewing the box cooler steel plates including cropping the old sea chest plates and replacing them with new steel plates prefabricated in the DSAm steel workshop and machine shop. Once the works were complete all the interior areas affected, including the ballast water tanks, forward tanks, coffer dam tanks and hull plates, were treated with a coatings system. The yard also blasted and painted all the repaired sea chests and 16 additional forward sea chests.

Thrusters overhauled

Whilst the ‘Deep Arctic’ was in dry dock, her six tunnel, retractable and Azimuth thrusters also underwent a complete overhaul including upgrades and her propeller shaft and centre line rudder also had their 10-yearly maintenance programme. These operations all took place in close collaboration with the Owner’s specialists Rolls Royce and OEM. Additional associated works included the fabrication of new piping for both tunnel thrusters, renewal of the lower gear units, repairs to the rudder stock actuator and the overhaul of the stern tube seal boxes.

To complete the schedule of works, the yard also performed a large number of assorted tasks at considerable heights. These included repairs to the gangway and load tests on the accommodation ladder and platform. Maintenance was also done to the structures of cranes no.1 (400T) and no.2 (58T), which included the removal of rust and painting the main and navigation masts and the helideck support structure.

All the works were undertaken to TechnipFMC’s and DSAm’s exceptionally high safety standards, aided by the close cooperation and planning that took place between the Damen and TechnipFMC project teams. The carefully configured seven-man DSAm project team ensured that the yard had enough resources to meet the high demands of TechnipFMC, and it included three junior project managers plus one, fully project-dedicated, safety officer, which is relatively unusual. Both teams also had a planner onboard to keep the works operating to schedule. The overall result was a project delivered on time, to the highest quality and with zero hours lost to injuries and restricted work cases.

DAMEN SHIPREPAIR AMSTERDAM

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Damen Shiprepair Amsterdam is equipped with excellent facilities capable of meeting the highest expectations in both speed and quality.

  • OSV maintenance at Damen Shiprepair Amsterdam
  • 'Deep_Arctic' at Damen Shiprepair  Amsterdam
  • Maintenance programme for Offshore Support Vesel "Deep Arctic"
  • Class renewal docking for Offshore Support Vessel
  • Offshore Support Vesel maintenance at Damen Shiprepair Amsterdam
  • OSV maintenance at Damen Shiprepair Amsterdam
  • 'Deep_Arctic' at Damen Shiprepair  Amsterdam
  • Maintenance programme for Offshore Support Vesel "Deep Arctic"
  • Class renewal docking for Offshore Support Vessel
  • Offshore Support Vesel maintenance at Damen Shiprepair Amsterdam

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