Case Study: Diamond Offshore Drilling, Ocean Lexington

Location: Cadiz Shipyard, Spain

Sureclean were requested to carry out HVAC/Duct inspection and cleaning of galley and accommodation block onboard the Ocean Lexington during a shipyard visit at Cadiz Shipyard in the South of Spain.

Sureclean Scope

Provide 3 Sureclean Engineers and the necessary equipment for the inspection and subsequent cleaning of the ducts in the galley and accommodation block.

Technical Challenge

Due to the rig being manned to capacity and ongoing refurbishments to the accommodation, there were restrictions to galley access and personnel cabins which therefore restricted the work program. A portion of the galley HVAC also had to be stripped out and steam cleaned due to the high build up of hardened grease.

Restrictions / Considerations

  • Restricted access.
  • Simultaneous asbestos removal works being undertaken.
  • High dust content due to removal of concrete flooring.
  • Adaptability of personnel to work outwith normal hours to accommodate crew shift rota for the purpose of gaining access to occupied cabins.

Key Facts

  • Completed within time and budget with no incidents or accidents.
  • Coordination of works to avoid conflict with other contractors workscopes.

Additional Information

During the successful completion of the HVAC/Duct inspection and cleaning workscope, Sureclean were subsequently awarded a project to blast and paint the Potable Water Day Tank. This in itself presented a challenge as this was deemed as critical path works and there was only a 5 day window to mobilise the required equipment and scaffold personnel from the UK to Spain before the works were due to commence. A further restriction was the locality of the tank, being 60 feet below the main deck within the electrical switch room and the rig warehouse, resulting in their having to be 100% containment as this was deemed as a dust free zone.

Restrictions / Considerations

  • Confined space entry works.
  • Working within Hazardous environment.
  • High voltage electrical equipment within locality of works.
  • Main thoroughfare for personnel accessing rig warehouse.
  • Routing of Hoses and electrical cables to worksite.
  • Remote working.

Key Facts

  • Completed within time and budget with no incidents or accidents.
  • Versatility of personnel, due to our personnel being multi disciplined, the same personnel who undertook the cleaning of the HVAC system were able to perform the additional works. This then eliminated the need to mobilise additional personnel which in turn resulted in cost savings to the client.