• SAL Yoke System

    The SAL Yoke System (SYS) is a cost-effective solution for Floating Production, Storage and Offloading vessel (FPSO) operating in shallow waters. SYS is based on APL's proven technological components and is designed for long-term unattended service. All critical components are designed for lifetime along with inspection and maintenance access.

    A SYS base anchored to the seabed integrates the PLEM (pipeline end manifold) and a mooring yoke with a chain connection to the FPSO at her bow. The yoke weight and heights are adjusted to cater for any vessel size and high sea states. A column transfers the torque and supports the topsides inclusive of the swivel stack and associated piping and valves. Flexible jumpers transfer oil, gas, water and utilities to and from the FPSO in a U-shaped catenary.



    Description

    Advantages

    The SYS allows for schedule decoupling between the offshore and the shipyard work. Initial installation of SYS can be completed independently from the FPSO conversion or new build. The system is installed offshore prior to the FPSO arrival at the field. Upon arrival, the vessel hooks up to the SYS with the help of tugs but no construction vessel is required to assist.

    The SYS provides for reduced bending moment on to the structure compared with traditional jacket soft yoke. In turn, reduced bending moments allow for a more cost-efficient structure which is less prone to fatigue issues. 

    The system also allows for high sea states in very shallow waters - up to 10 m Hs in water depths of 42 m and 5 m Hs in depths of 18 m.

    During offshore installation, the SYS chain connection to the FPSO is decoupled from the yoke. The yoke is controlled by a RAM winch and the chains are load-free while the connection is performed.

    SYS Integration

    Vessel modifications are in the bow area and are limited to chain connecting arms, gutters and equipment lay-out as opposed to bow integration of a yoke.

    SYS System References

    Our SYS systems have been installed in Bohai Bay in China.

    SYS in Ice

    The SYS has a minimum sea surface interface. Its column diameter can further be equipped with a conical shaped ice breaker that allows the system to sustain up to 50 cm of ice sheet.

    SYS for High Pressure LNG Re-Gas
     
    The SYS can be used to moor FSRUs.