Having supplied close to 50 turret-mooring systems for many different clients in the energy industry, we have demonstrated our ability to deliver project-specific technology many times over. Between 2007 and 2010 we put our expertise to the test yet again – constructing the Skarv Turret, one of the largest and most complex structures of its kind to date.
In 2007, BP appointed SBM Offshore to complete the Skarv turret project – the first of its kind we have undertaken in Norway. The contract scope covered design of the mooring system and supply of the swivel stack, mooring lines and suction anchors. The Skarv turret is one of the largest in the world with mooring loads of 5,500 tonnes. Based on our bogie-bearing design it remains one of the most complex we have ever constructed.
Demanding technical parameters
Our design and manufacturing standards were subjected to rigorous audits by the Petroleum Safety Authority Norway, DNV and BP – who all shared our determination to ensure that the completed Skarv turret encapsulated technology at its very best: safe, reliable and supremely efficient.
The swivel stack for Skarv is composed of 12 swivels, combined in a 21.5m high stack that incorporates high pressure units constructed using exotic materials along with complex HV and LV power and signal swivels. Together with a manifold and piping design solution that exceeds BP’s maximum safety considerations, these elements made construction of the turret one of the most challenging projects we have ever undertaken.
In March 2010 we delivered the main turret sub-assemblies to the Samsung Heavy Industries yard in Korea to be integrated into the FPSO hull. Following several months of intensive work, the FPSO Skarv left the yard at the end of November that same year. It arrived in Norway in February 2011 and following 6 weeks of final completion work was moved offshore to commence full operations in April 2011.