Decommissioning

Longitude has carried out the detailed design and engineering for all types of offshore decommissioning projects, from jackets and topsides through to MOPU and FPSOs including their moorings and risers.

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Marine and offshore decommissioning engineering

Longitude combined with our sister company LOC’s long-term marine experience, is highly experienced with all types of vessels, from tugs and barges to DP construction vessels and module carriers.

To execute these installation engineering projects, our specialist engineers provide a range of services, such as:

Dynamic lift analysis in air and through the splash zone
Motions, mooring and stability analysis
Grillage and seafastening design
Structural integrity assessment of the platform and decommissioning vessels
Structural design for decomissioning
Mooring line pull in assessment
Floatoff Engineering
Risk Assessment
Preparation of Operational Procedures and Method Statement
Dropped Object and Impact Analysis

Longitude’s experience in decommissioning covers single piece heavy lift decommissioning for entire topsides, development of novel concepts as well as engineering for modular or piece by piece removal.