The IOG Blythe and Southwark wellhead platforms have been installed by our client Seaway 7, in line with the project schedule. Both platforms are founded on suction piles. Suction piles were selected, because of the hard soil layers, that would hinder pin pile installation. Together, and on behalf of HSM Offshore, SPT Offshore designed and built the suction piles for both platforms. Furthermore, the fast, smooth and noisefree installation of the suction pile were reasons to select this type of foundation for the respective 3- and 4-leg platforms.
During the suction installation of the Southwark suction piles, SPT’s proprietary “self-installing scour protection system” (ScPS) was successfully installed. The ScPS is an innovative scour protection system installed around the suction piles. The umbrella-like unfolding system uses SSCS frond mats, which are pre-installed onshore around the suction piles, and is self-deploying during penetration of the suction piles into the seabed. The ScPS can also be used around monopiles, which makes the system suited for most offshore wind farms. As no additional (rock dumping) vessels are required, the system offers a simple means of preventing scour and strongly reduces the CO2/NOX footprint of offshore foundations for renewables and oil & gas.