Energy [Offshore Business]

Our vessels play active roles in marine resource development and offshore energy production. For example, some vessels are berthed offshore to produce crude oil and gas, and others serve as LNG receiving terminals, and more. This section introduces a wide array of vessels involved in our offshore business.

— Vessels Play Key Roles in Crude Oil and Gas Production —
  • ●Floating Production Storage and Offloading Systems (FPSOs)
    FPSO stands for "Floating Production, Storage and Offloading system." Oil reservoir fluids extracted from deep-sea oilfields are brought into an FPSO and separated into crude oil and gas by processing equipment on deck. Treated crude oil is transferred to the cargo tanks in the FPSO ship’s hull, and regularly offloaded onto shuttle tankers. Treated gas is used as fuel for the FPSO. It is also transported to shore via pipeline or re-injected back into oil wells. This entire series of operation is performed aboard the FPSO. Many FPSOs are converted second-hand oil tankers. The mooring equipment, production equipment, offloading equipment, and so on are installed on the FPSO after hull reinforcement.


  • Floating Production, Storage and Offloading System (FPSO)
    source: MODEC, Inc.


  • Shuttle tankers transport crude oil from FPSOs or other offshore production facilities to onshore terminals. These tankers are equipped with dynamic positioning systems (which electronically control the ship’s maneuvering to maintain its position), bow loading systems (offshore loading equipment mounted on the bow), and so on to ensure safe loading operation without anchoring, even under severe sea, weather, and tide conditions.


Shuttle tanker

  • Subsea support vessels are used to install, maintain, repair, and remove subsea facilities, playing key roles in every phase of the offshore oil and gas business, including exploration, development, and production.
    These vessels feature dynamic positioning systems, underwater robots, deep-sea cranes, and other equipment to implement these operations.


Subsea support vessel

— Vessels Serve as LNG Receiving/Regasification Terminals —
  • ●Floating Storage & Regasification Units (FSRUs)
    FSRU stands for "Floating Storage and Regasification Unit." The main roles of FSRUs include not only serving as offshore LNG receiving terminals that store LNG discharged from LNG carriers but also re-gasifying it on demand and offloading high-pressure gas to onshore pipelines. Many FSRU projects are in progress around the world, because of lower costs and faster implementation compared to building onshore LNG receiving terminals.


  • Floating Storage & Regasification Unit (FSRU)


  • ●Shuttle Re-gasification Vessel (SRV)
    The SRV, stands for "Shuttle Regasification Vessel," is a type of FSRU that can take on LNG as cargo at a loading terminal, re-gasify it onboard, and offload it directly into subsea gas receiving pipelines.

    SRVs can also transport LNG to onshore receiving terminals, just like conventional LNG carriers.

    SRVs make it possible for nations to import LNG without building or expanding onshore LNG receiving terminals. This is a solution that offers flexibility in LNG transport and receiving operations.


— Vessels Playing Active Roles in Creating Renewable Energy —
  • ●Self-Elevating Platforms (SEPs)
    Self-Elevating Platforms (SEPs) are vessels that can install windmill turbines and basic structures necessary for offshore wind power generation. Use of wind power has been expanding recently, mainly in Europe but also on a global scale. SEPs have legs to hoist the hull above seawater, stabilizing the vessel for safe and reliable installation work at sea using the large crane onboard.

    SEPs also play active roles in supporting projects other than wind generation plants, such as maintenance of offshore oil/gas wells.


  • Self-elevating platform (SEP)

  • SEP diagram


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