Semi-Submersible Drilling Platform

The semi-submersible drilling platform is a floating offshore rig where a large portion of the structure sits below the water surface. This design provides greater stability in rough sea conditions compared to drillships, making it a preferred choice for medium to deep-water exploration.

Semi-submersibles operate in water depths ranging from approximately 500 to 10,000 feet (150 to 3,000 meters). They are anchored or held in position by dynamic positioning systems. Their stability and ability to operate in harsh weather make them essential for deep-water oil and gas exploration in offshore basins worldwide.

• Submerged columns and pontoons provide stability in rough seas
• Operating water depth range: 150 – 3,000 m (500 – 10,000 ft)
• Mooring line or dynamic positioning system for station-keeping
• Large deck area for drilling equipment, mud systems, and crew quarters
• Superior motion response compared to surface vessels in high waves
• Suitable for deep-water exploration, appraisal, and production support drilling

• Deep-water oil and gas exploration drilling
• Offshore appraisal and production wells in ultra-deep waters
• Harsh-environment offshore operations (North Sea, West Africa, Brazil)
• Subsea tieback and field development drilling programs