GALLERY: Final turret modules for Johan Castberg FPSO head to Singapore

The last two modules for Equinor’s Johan Castberg FPSO turret mooring system have sailed away from Dubai to Singapore.

SBM Offshore said on Monday that the modules were heading to Singapore to be integrated into the hull of the Johan Castberg FPSO, which is being built by Sembcorp Marine. Kvaerner is in charge of building the topsides.

SBM was hired by Equinor in late 2017 to deliver a large-scale turret mooring system for the Johan Castberg FPSO. SBM then awarded a contract to Dubai’s Drydocks World to build parts of that turret mooring system.

According SBM, the sailaway of the two modules represents the successful completion of the modules fabrication phase.

Michael Sandberg, SBM Offshore senior project manager, said: “We are delighted to have completed this milestone for the Johan Castberg project”.

Drydocks World Dubai (DDW) fabricated all four modules for the turret mooring system (TMS). The first two modules, the bogie support structure and the lower turret, were completed in 2019 and delivered to the Singapore yard in 2019/2020.

The manifold and gantry modules were completed and loaded onto the transportation vessel in mid-April, and delivery to the Singapore yard is expected in May.

As for the turret design, it is an 8,000-tonne bogie turret accommodating 21 riser slots. The FPSO Johan Castberg will operate on the Skrugard, Havis, and Drivis discoveries in the harsh operating conditions of the Barents Sea, offshore northern Norway.

The FPSO will be permanently moored in 372-meter water depth utilizing three bundles of five mooring lines.

The TMS allows the FPSO to safely stay in position on the field in the extreme weather conditions while ensuring safe operations and the transfer of fluids from the seabed via the risers to the FPSO.

All images courtesy of SBM Offshore