Offshore Transport & Installation

  • Expertise
  • Transport & Installation
DORIS Marine capabilities are well developed in the construction phase with a strong know-how in offshore transportation and installation. T&I Engineering covers the Installation Methods development / analyses through installation procedures, HIRA facilitation & management, shore approach, trenching, towing, pre-commissioning procedures, etc. DORIS Marine is also an active contractor in the market of Marine Renewable Energies and has been involved in transportation & installation of fixed turbines and subsea tidal turbines. In addition to an independent engineering, we provide pragmatic & cost effective solutions by maintaining a constant focus on our customers’ needs as well as on construction and operational constraints. .

Core Competences

Deep Offshore Installation Method

  • Deployment & Installation Procedure for structure, riser, spool piece, jumper, pipeline, power cable, umbilical, flexible line, mooring line, etc
  • Lift plan / Towing & station keeping procedure
  • Pigging & hydrotesting procedure
  • ROV procedure

Conventional Offshore Installation Method

  • Deployment & Installation Procedure for jacket, topside module, structure, riser, spool piece, pipeline, power cable, umbilical, flexible line, mooring line, offshore terminal, etc
  • Lift Plan
  • Shore approach procedure including pre & post laying stabilization
  • Pigging & Hydrotesting procedure
  • Diving procedure

T&I Project Support

  • Suppliers' evaluation and selection
  • Project risk, cost & schedule estimate
  • HIRA & HAZOP session organization & facilitation
  • Vessels suitability survey
  • Contractual & purchasing strategies

Transportation Analyses

  • Transportation analysis
  • Towing analysis
  • Seafastening design
  • Station keeping analysis with proprietary software

Lifting Analyses

  • Lifting (structure, heavy lift, riser, spool piece, jumper, etc) analysis
  • Rigging design
  • Installation hydrodynamics analysis
  • Deployment & landing analysis

Laying Analyses

  • Pipeline, power cable, umbilical, flexible line & mooring line laying & recovery analysis
  • S-lay, J-lay, Reel lay, Tensioner in horizontal or vertical lay mode analysis
  • Shore approach analysis