Mobile Rigs

Offshore mobile rigs are widely used in various stages of offshore oil and gas production, from wildcat to well workover.  Advanced coating solutions from Jotun protect hundreds of drillships and offshore mobile rigs operating in all oceans – exposed to the threat of corrosion, hydrocarbon pool or jet fire as well as marine fouling.

Drillships and offshore mobile rigs are called for dry-docking every 5 years for safety check.  To maximize efficiency during operation, in dry-dock or in towing towards new waters, it is important to protect these valuable offshore assets against corrosion, fire and fouling.

Offshore mobile rigs are operating statically for months up to years - an ideal environment for marine growth on the underwater areas. Fouling will not only reduce the lifetime of underwater protective coatings and add friction during towing, but may also lead to unexpected docking if the regulations on marine growth immigration is applicable when a mobile rig is towed into a new water.

Safety is always of top priority for all types of offshore installations, including drillships and offshore mobile rigs. Processing and storage of hydrocarbon on board the crowded offshore facility involve high risk of fire.  Thus the most reliable passive fire protection (PFP) towards hydrocarbon pool fire and jet fire is essential.  In addition to performance and liability, application efficiency is critical. When billions of capital expenditures are invested in offshore oil & gas production, a PFP that enables simplified and highly efficient application will save valuable time and cost to both owner and fabricator.

Carbon steel with maximum operating temperature < 120°C
–  Structural steel
–  Exteriors of equipment, vessels, piping and valves (not insulated)

Carbon steel with operating temperature > 120°C
–  All insulated surfaces of tanks, vessels, piping
–  Flare booms and crane booms
Underside of bottom deck included piping, jacket above splash zone and life boat stations are optional areas (to be decided in each project)

Internal of carbon steel tanks

Walkways, escape routes and lay down areas

Under passive fire protection

Stainless steel, aluminium and galvanised steel

Submerged carbon steel and carbon steel in the splash zone
Submerged stainless steel and stainless steel in the splash zone

Structural carbon steel with operating temperature ≤80°C in internal and fully dry and ventilated areas

Bulk supplied carbon steel valves with operating temperature up to 150°C