Deep Water and Subsea

Deep Water and Subsea Engineering and Construction Expertise

Deep water and subsea projects demand innovation, cutting-edge engineering, commitment, project management expertise and experience. For nearly 50 years, IEPC has built a legacy of excellence and offshore expertise. IEPC offers full field development capability, from studies to engineering, procurement, fabrication, installation and commissioning for offshore projects. IEPC’s comprehensive services for deep water and subsea projects include:
  • Constructability-led, high reliability engineering design during all project phases
  • Deep water and subsea project management
  • Deep water risers and flowlines
  • Flow assurance
  • High pressure / high temperature
  • Large-scale module fabrication
  • Offshore construction experience
  • Subsea and trestle-based LNG / LPG pipelines
  • Subsea pipelines with diameters as large as 56 inches
  • Subsea production systems, processing, metering and tieback
  • Water depths from shore crossings to ultra-deep
Subsea Equipment Manufacturing Experience IEPC experts in subsea equipment can assist in selecting, specifying or designing the equipment / technology best suited for your needs:
  • Pipeline end manifolds (PLEMs) and pipeline end terminations (PLETs)
  • Subsea control systems
  • Subsea manifolds
  • Subsea multi-phase flow meters
  • Subsea processing equipment
  • Subsea templates
  • Subsea trees
  • Subsea umbilicals, risers and flowlines (SURF)
New Subsea Technology Riding the Wave to the Future IEPC Offshore Solutions, in addition to utilizing current, state-of-the-art technologies, is looking to the future, with innovative technologies to add value to future projects. Technologies under development include:
  • Alternate offshore power systems
  • Ambient pressure insulated subsea LNG pipeline (patent-pending)
  • Carbon capture and sequestration
  • CO2 enhanced oil recovery
  • Dual choke high integrity pressure protection deep water production system (patent-pending)
  • Heavy crude production
  • High-integrity arctic subsea pipelines and production systems
  • Intelligent choking system for multi-phase flow (patent-pending)
  • Methane production from hydrates
  • Real-time monitoring and control systems
  • Smart field development systems
  • Subsea production and separation systems
  • Ultra-deep water hybrid and high-strength steel risers
  FLOW ASSURANCE Hydrocarbon Transportation – Onshore and Subsea Pipelines, Marine Terminals, Related Facilities and Flow Assurance IEPC has been designing and building onshore and subsea pipeline projects for more than 100 years. Engineering, procurement and construction management services for pipeline projects include feasibility studies through detailed design, permitting, construction, program management and initial operation. Our expertise encompasses both small and large diameter pipelines for the transportation of commodities including:
  • Crude oil – light to heavy, with diluents and sweet to sour
  • Liquefied petroleum gases (LPGs) – butane, propane and propylene
  • Natural gas – sweet as well as sour natural gas, dense phase and high pressure
  • Refined petroleum products – gasoline, diesel, jet fuel, etc.
  • Special use gases & chemicals – nitrogen, carbon dioxide, hydrogen, ammonia, liquid chlorine & sulfuric acid
  • Water – waste to potable, including seawater and produced water
IEPC is strong in all major facets of pipeline design as well as structural, civil, mechanical, electrical, instrument and SCADA system engineering. IEPC has the proven experience and global reach to execute the complete range of challenging pipeline projects: Onshore and Cross-Country Pipelines IEPC's onshore pipeline experience includes more than 200,000 miles of installed pipeline, developed for a wide range of terrains, including deserts, mountains, oceans and rain forests, and for climates ranging from sweltering tropics to the frozen arctic. IEPC has a proven track record for large-diameter, complex, high-pressure and logistically challenged pipeline projects worldwide. Technical expertise:
  • Discrete simulation analysis capability
  • Environmental impact studies and reports
  • Fatigue analysis
  • Geo-hazard design
  • GIS database design and analysis
  • High pressure pipelines
  • Multi-phase flow
  • Pipe stress analysis
  • Pipeline pipe mill certifications and inspection
  • Risk evaluation / mitigation
  • Route optimization and logistics planning
  • Steady-state and transient hydraulic analysis
  • Strain-based or risk-based design
  • Water body, road, rail, existing pipeline and beach crossings
Subsea Pipelines and Flow Assurance IEPC has designed some of the world’s largest and longest offshore pipelines, successfully designing pipelines and flowlines to carry oil, gas, multi-phase production, gas condensate and liquefied natural gas (LNG). IEPC provides engineering, fabrication, procurement, construction management and project management, as well as operation and maintenance services, on subsea and deep water projects around the world. Engineering design expertise includes:
  • Configurations of pipe-in-pipe, bundles, heated pipelines, wet insulated and single pipelines
  • Shallow to ultra-deep water
  • Short tiebacks to long step-outs, complicated subsea architecture and export pipelines
  • Upheaval / lateral buckling analysis
IEPC Offshore Solutions has an experienced staff in deep water riser design including:
  • Flexible risers
  • Hybrid risers
  • Installation analysis
  • Riser towers
  • Sage profile analysis of the profile and span length of a large diameter offshore pipeline
  • Steel catenary risers
  • Top tension risers
  • Vortex Induced Vibration (VIV) analysis
Flow Assurance
  • Consideration of new and emerging technologies, such as low dosage hydrate inhibitors and subsea processing
  • Fluent® / CFX® / ANSYS® / Abaqus® for FEA analysis of complex localized flow and heat transfer, and solidification / melting
  • OLGA® simulation of the operation to clear accumulated liquid in a steep uphill section of a subsea flowline.
  • OLGA / PVTsim flow assurance and fluid characterization simulators for addressing transient operational issues
  • PIPEPHASE® / PIPESIM® steady-state, multi-phase flow simulation software for analyzing normal operations
Marine Terminals and LNG Regasification Terminals IEPC has over four decades of experience in the international marine terminal industry, providing life-cycle services in all types of port, harbor and terminal projects. Based on the challenging location and desired project performance criteria, IEPC uses a consultative approach to encompass project conceptual, feasibility and front-end engineering design (FEED) continuing through detailed engineering, procurement, fabrication and construction management (EPFCM). In addition to EPFCM, IEPC’s marine constructability acumen covers:
  • Commissioning and start-up
  • Fabrication
  • Modular construction
  • Operations and Maintenance
  • Permitting
  • Project management
This experience and diverse background enables IEPC to focus on optimizing value, including ultimate operability and reliability, during the critical conceptual planning and design activities of the facility. Marine Terminals Marine terminal special considerations include:
  • Breakwater systems
  • Fixed platform jackets
  • Floating docks
  • Floating Storage and Offloading (FSO) mooring systems:
    • Fixed spread mooring or turret type
    • Offloading system for shuttle tankers, tandem system, or remote buoy
    • Flexible risers for incoming / outgoing flow lines
  • Gravity-based structures
  • Material Offloading Facilities (MOF) for plant construction
  • Module offloading docks
  • Navigation channels
  • Offshore terminals
    • Floating Production Storage and Offloading (FPSO)
    • Floating Storage and Regasification Unit (FSRU)
  • Ports and harbors
  • Sheet pile structures
  • Trestle and jetty structures
LNG Regasification Terminals IEPC has served the gas processing industry for over half a century, with active participation in LNG for the last 40 years. The combination of both LNG and marine terminal capabilities, along with our project management and financing expertise, has pushed IEPC to the forefront of LNG receiving terminal design. IEPC has been involved in projects with a combined capacity of more than 60 MTPA on five continents around the globe. IEPC continues to invest substantially in new technologies to meet tomorrow’s challenges. Our expertise includes:
  • Marine facilities pre-FEED / FEED design and EPC contracting
  • Patent-pending solutions for LNG heating value and composition control
  • Patented subsea LNG pipeline technology
  • Program management and project financing
  • Technology evaluation for both onshore and offshore (floating and fixed) projects
Coastal Engineering Expertise IEPC’s coastal engineering group has extensive experience in coastal hydraulics, hydrology, water resources, environment and oceanography. Our services provide comprehensive support for all phases of marine projects. Our established in-house coastal hydrodynamic modeling capability gives IEPC a competitive edge, eliminating the need for third-party consultants. Coastal engineering services include:
  • Anchorage mooring system design
  • Calculation of wave and current force on marine structures and overtopping
  • Design of shore protection structures
  • Establishment of metocean design criteria including wind, wave, tide, current, tsunami, storm surge, sea level rise and ice
  • Marine facility layout and conceptual design
  • Navigation channel design
  • Passing ship study
Pipeline Related Facilities IEPC’s pipeline capabilities encompass the design and installation of a full complement of cross country pipeline related facilities including:
  • Compressor stations
  • Customary transfer metering stations
  • Integrity monitoring systems
  • Leak detection systems
  • Mainline value stations
  • Pigging facilities, slug catchers and flare pits
  • Pressure control and pressure reduction stations
  • Product terminals
  • Pump stations
  • River, road, rail, water body, beach and pipeline crossings
  • SCADA systems, communications and control facilities
  • Shore approaches