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VesselPipelineNigeriaUpgradationFeasibility & detailed engineering
Pipelay vessel upgrade — piggyback pipeline installation
2026 · Nigeria
Two-phase engineering to modify an operating pipelay vessel for piggyback pipeline installation — from technical feasibility and modification concept to detailed engineering.
2 phasesFeasibility to detailed engineering
Scope of work
Review of vessel documentation, pipelay arrangement and project requirements
Assessment of firing line, stinger, pipe handling systems and supporting structures
Identification of required modifications, technical risks and constraints
Development of the modification philosophy and implementation recommendations
Detailed engineering calculations, analyses, drawings and layouts
Engineering support during design review and implementation
Services demonstrated by this project
OSV & Vessel Conversion EngineeringConversion engineering for offshore support and work vessels: OSV to well-stimulation vessel, barge to pipe-lay barge, tanker to FSO/FPSO and LNG carrier to FSRUTransportation & Installation (T&I) EngineeringTransportation and installation engineering for jackets, topsides, modules, risers and conductors: load-out, transportation, launch or lift, upending, set-down and hook-up analysed as one sequence, with the method statements and calculation notes the marine warranty surveyor reviewsSubsea Pipeline DesignSubsea and nearshore pipeline design to DNV-ST-F101: route selection, wall thickness and material grade, on-bottom stability (DNV-RP-F109), free-span and VIV fatigue (DNV-RP-F105), expansion and lateral buckling, shore approaches and HDD crossings, and installation analysis for S-lay and J-lay
Region