Discipline 02
Offshore Structural Engineering
Structural engineering for fixed and floating offshore assets — from greenfield FEED through brownfield requalification and decommissioning. Assets include fixed jackets, wellhead platforms, topside decks, process modules, conductor frames, monotowers, compliant towers, and subsea structures (manifolds, templates, foundations). 39 ONGC jacket structures surveyed and assessed; active on life extension, T&I engineering, and integrity management.
Capabilities
Platform & Topside Design
- FEED & detailed jacket design (SACS)
- Topside deck & module structural design
- Pile & foundation design — axial, lateral, soil-structure interaction
- Secondary steel & appurtenances — boat landings, J-tubes, walkways
- Flare booms, vent towers & helidecks — CAP 437 / NORSOK C-004
Global & Local Structural Analysis
- In-place analysis (ULS) — wave, wind & current
- Fatigue analysis (FLS) — deterministic & spectral, DNV-RP-C203
- Seismic analysis — response spectrum & time-history, API RP 2EQ
- Pushover & collapse (ALS) — RSR
- Local FEA, joint & buckling checks — Abaqus / ANSYS
- Lifting, loadout & transportation — offshore lift DAF, padeye / rigging, sea-fastening (SACS / MOSES)
Requalification, Integrity & Life Extension
- Structural requalification — API RP 2A Sec.17 / ISO 19902 Annex A
- Fatigue re-assessment — updated SCFs, inspection data, remaining life
- Platform modification — conductor additions, deck extensions, load increases
- Structural integrity management (SIM) & risk-based inspection (RBI)
- Decommissioning engineering
Assets we engineer
Fixed jackets & wellhead platformsProcess & utility platformsTopside decks & process modulesConductor frames, monotowers & compliant towersSubsea structures — manifolds, templates & foundationsBrownfield & decommissioned assets
Active software
SACS
ANSYS
Abaqus
MOSES
Sesam (GeniE)
STAAD.Pro
LS-DYNA
Femap
PLAXIS
OrcaFlex
Tekla Structures
AVEVA E3D
MicroStation
MATLABStandards & codes
API RP 2AISO 19902ISO 19901DNV-RP-C203API RP 2EQNORSOK N-001NORSOK N-004AISC 360CAP 437DNV-ST-N001
Services in this discipline
Sea Fastening & Load-out EngineeringSea-fastening and load-out engineering for cargo, modules and cranes carried on barges and heavy-transport vessels: motion and acceleration criteria, grillage and tie-down design, ballast and load-out sequences, and the calculation package prepared for marine warranty surveyor approvalLifting & Heavy-Lift EngineeringLift engineering for offshore and yard lifts: rigging design, lift-point and padeye checks, dynamic amplification, crane-vessel and barge stability during the lift, and the lift plan calculations reviewed by class or a marine warranty surveyorOSV & 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 FSRUThird-Party Verification & Independent Design ReviewIndependent verification of offshore structural, naval architecture and pipeline engineering: design reviews, re-analysis with our own models, structural integrity assessments and owner’s-engineer review of contractor deliverablesFSRU & LNG Terminal Engineering with Cryogenic PipingEngineering for FSRU conversions and LNG import terminals: regasification and hull interface structure, jetty berthing and mooring analysis, cryogenic piping design and stress analysis to ASME B31.3, and class and IGC Code complianceTransportation & 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 reviewsRiser & Conductor Installation EngineeringInstallation engineering for risers and conductors on fixed platforms: clamp and guide design, lift and running procedures, vessel interface, fatigue during installation and the MWS-ready calculation packageLife Extension & Structural Integrity AssessmentStructural integrity management and life-extension assessment for fixed platforms past their design life: survey data interpretation, corrosion and damage modelling, in-place, fatigue and pushover analysis for reserve strength, and a requalification statement to API RP 2A Section 17 / ISO 19902 Annex AJacket & Topside Structural DesignStructural design of fixed offshore platforms from FEED to fabrication drawings: jackets, wellhead and process decks, bridges, flare towers, helidecks and secondary steel, analysed for in-place, fatigue, seismic, transportation, launch and lift conditions to API RP 2A and ISO 19902, in SACS and SesamJack-up Site-Specific Assessment (SSA) SupportEngineering support for jack-up site-specific assessments to ISO 19905-1 and SNAME T&R 5-5A: leg penetration and punch-through screening, preload, storm-survival and operating checks, spudcan-footprint interaction and platform proximity, for drilling contractors and operators in ONGC, ADNOC and Aramco shallow-water fields.Offshore Wind Substructure & Installation EngineeringFoundation and installation engineering for fixed and floating offshore wind: monopile and jacket substructure design to DNV-ST-0126 and IEC 61400-3, offshore substation platform structures, floating-platform mooring and station-keeping, and transport, sea-fastening and installation engineering for monopiles, transition pieces and WTIV operationsFEED & Detailed Engineering Support for EPC ContractorsEngineering-hour support for EPC, EPCI and fabrication contractors on offshore and marine projects: FEED deliverables, detailed structural, naval and pipeline engineering, 3D modelling in AVEVA E3D and SP3D, production drawings and class or certifier submissionsOwner’s Engineer & Project AdvisoryOwner’s engineer services for vessel owners, operators and developers: specification and tender evaluation, review of the contractor’s or yard’s engineering, class and regulatory liaison, site and yard supervision, and change and claims support through commissioningDecommissioning Engineering for Offshore PlatformsEngineering for the removal of ageing offshore platforms and pipelines: structural assessment of the as-is condition for cutting and lifting, reverse-installation and lift engineering, sea-fastening for the return transport, pipeline decommissioning options and the comparative assessment behind the decommissioning planOffshore & Naval Architecture Engineering Outsourcing from IndiaA dedicated offshore engineering team in Mumbai for consultancies, EPC contractors, design houses and vessel owners in Europe, the Gulf and Asia-Pacific: naval architecture, offshore structural, pipeline and piping engineering delivered under your standards and software, at Indian engineering-hour rates, with a working day that overlaps the Gulf fully and Europe every afternoon.
Projects that prove it
Sea-fastening & load-out — crane on bargeSea-fastening design and load-out engineering for crane transportation on barge — 6 items secured for safe passage.Riser installation — 4 platforms, 16 liftsCrane vessel installation engineering for risers across 4 offshore platforms — vessel selection, installation analysis, and methodology for 16 lifts.Davit installation — 4 × 50 MT davitsStructural engineering for the installation of four 50 MT davits along the port side of an offshore construction vessel.Riser lifting feasibility — 30+ lifts assessedFeasibility assessment of riser installation across multiple candidate vessels — structural analysis and lift methodology for 30+ lifts assessed.Conductor installation — Mumbai High, 120+ offshore daysSite supervision and project management for conductor installation at Mumbai High — 120+ offshore days, ONGC post-installation approval secured.OSV to WSV conversion — Norway, 200 MT steelDetailed engineering for OSV to Well Stimulation Vessel conversion — deckhouse structure, nesting plans, fabrication drawings, 200 MT+ steel engineered.Owner's advisory — vessel selection & PLB conversionStrategic advisory for purchase and conversion of a vessel to Pipe Lay Barge — vessel purchased at a reasonable negotiated price.Vessel pre-purchase survey & inspectionFull vessel condition assessment, thickness gauging, and engineering recommendations — vessel purchased at a 20% discount on asking price.Pipelay vessel upgrade — piggyback pipeline installationTwo-phase engineering to modify an operating pipelay vessel for piggyback pipeline installation — from technical feasibility and modification concept to detailed engineering.Structural review — 5 jackets & topsidesIndependent review of structural deliverables for five offshore jackets and their topsides — design reports, calculations and drawings checked against applicable codes.Jacket face survey — 39 platformsStructural assessment of 39 jacket faces for riser and clamp installation — ONGC-approved hand sketches, drawings, and survey reports.