Offshore Gas Platform Brownfield Tie-in

The challenge

The operator needed to tie a new well into an ageing wellhead platform whose as-built drawings were incomplete. Offshore bed space was limited, and every return trip for measurements would have added cost and schedule risk.

Our scope

• Laser scan registration and clean-up
• Intelligent as-built 3D model of the affected decks
• Tie-in piping, supports and structural modifications
• Stress analysis and IFC isometrics

Our approach

We registered more than 400 scan positions into a single point cloud and modelled the affected decks as intelligent, spec-driven objects. New piping was designed directly against the cloud so clashes with existing steel, cable trays and valves were found in the office rather than offshore.

• Model-to-cloud deviation checks within ±10 mm
• Clash reviews with the operator's offshore team
• Pre-fabrication spool design to minimise hot work

The outcome

The tie-in spools were fabricated onshore and installed in a single campaign with no field rework. The as-built model is now the operator's reference for future modifications on the platform.