Subsea Engineering, Inc.


  • Front End Engineering Design Studies
  • Manifolds
  • Marginal Field Development
  • Jumpers & Connectors
  • Vertical and Horizontal Trees
  • System Integration Test
  • High-Pressure/ High-temperature Trees
  • HPHT Design Verification
  • Template Systems
  • Control Systems
  • Workover Systems
  • IWOCS Systems
  • Large Bore Completion Systems
  • ROV Intervention Systems
  • Slim Well Completion Systems with Surface BOP's
  • Thermal Insulation
  • Wellheads
  • Corrosion Control
  • Valves


    Subsea Engineering, Inc (SEI) offers a wide range of engineering know-how gained from practical experience and is prepared to support subsea projects ranging from design to drilling through production.

  • Feasibility Studies
  • Subsea Field Layout and Architecture
  • CAPEX/OPEX Cost Estimate, Scheduling, Contract Service
  • System Specification
  • Project Management/ Control
  • Project Evaluation and Audit


  • Fabrication and Quality Assurance
  • Equipment, Assembly and System Testing
  • Flowline / Pipeline Connection Systems
  • Umbilical Connection Systems
  • Production and Installation Workover Control Systems
  • Cluster Wells / Manifolds / Valves & Actuators
  • PLEMs, In-line Tees, FLETs, Suction Pile Foundations
  • Umbilical Reels, ROV Tooling, Intervention Running Tools
  • Drilling / Workover BOP's and Controls
  • Subsea Well Blowout Prevention
  • Equipment and System Testing Program
  • Construction Fabrication
  • Equipment Installation and Commissioning
  • Offshore Installation Procedures
  • Finite Element Analysis
  • Personnel Training and Technology Transfer Program


    SEI personnel is familiar with and has designed and developed most types of subsea equipment such as subsea production or injection manifolds, well / flowline systems, IWOCS, ROV tooling, Horizontal and Vertical Trees, Subsea wellheads and Workover and Well Completion equipment.

    SEI as an independent supplier of equipment, will design and build the most advanced subsea packages with the best components (i.e. valves, connectors, etc) the industry has to offer, that will meet or exceed the project and safety requirements.


    A group of companies in the United States, UK and Norway are working with and supporting SEI in the areas of special equipment and engineering.

    People are the difference at SEI. SEI personnel are experts in numerous areas, such as Horizontal and Vertical Subsea Trees, Workover Systems, IWOCS and Control Systems. Every engineer at SSI has with over 10 years of practical subsea experience. SEI personnel have participated in a lot of large deepwater projects. The following is a partial list:

  • Woodside Laminaria Coralina - HPHT
  • Statoil Kristin - HPHT
  • Murphy Oil Kikeh
  • Norsk Hydro Troll
  • BP Nam Con Son
  • Norsk Hydro Fram East
  • Reliance KG-D6
  • Norsk Hydro Vilje
  • Petrobras Marimba
  • Norsk Hydro Visund
  • Petrobras Roncador
  • Norsk Hydro Njord
  • Petrobras Mexilhao - HPHT
  • Norsk Hydro Camilla Belinda - HPHT
  • Total Dalia
  • Marathon Alvheim
  • Soekor E-AR
  • Lundin Broom
  • Shell Garn West
  • Total Hild and Kessog - HPHT
  • Shell Rogn South
  • Independence Hub


    Please check


    Houston, Texas, USA
            Tel: +1 832-788-8684
            Fax: +1 832-242-5251
    Oslo, Norway:
            Tel: +47 918 33 966