Offshoreinstallation

Offshore installation refers to facilities located at sea that are used for energy extraction, processing, storage, or generation. Typical examples include fixed oil and gas platforms such as jacket or gravity-based structures; floating production systems (FPSOs, FPUs, semi-submersibles, tension-leg or spar platforms); subsea infrastructure such as templates, manifolds, and pipelines; and offshore energy installations like wind turbines, offshore substations, and wave or tidal energy converters. These installations are designed to withstand harsh marine conditions and are connected by process lines, control umbilicals, and data networks. Installations can be fixed to the seabed or supported by floating systems that moor or maintain dynamic position.

Lifecycle and construction: Offshore installations follow a lifecycle from concept and feasibility through design, fabrication, and transport to the site. Marine installation requires specialized vessels and equipment for heavy lifting, precise positioning, piping, and electrical hookups. Subsea components may be installed with remotely operated vehicles or divers and then integrated with topsides and onshore facilities. Safety and environmental protection are central, with risk assessments, commissioning, and testing conducted before full operation. Planning for decommissioning typically begins during early project stages.

Operations and decommissioning: In operation, the facility processes resources or generates energy, supported by ongoing maintenance, inspection, and integrity management. At the end of field life, decommissioning involves safely abandoning or removing structures, disposing of or repurposing components, and restoring seabed sites in accordance with regulatory requirements and environmental considerations.