The lift system is designed for installation and decommissioning of complete topsides weighing up to 48,000 metric tons (52,911 tons).
Pioneering Spirit’s 16 lifting beams feature 64 Enerpac CLRG-Series high tonnage double acting hydraulic cylinders arranged in groups of four. They were designed specifically for heavy lifting up to 1,000 metric tons (1,102 tons).
The double-acting cylinders are said to provide high levels of precision and control, enabling the vessel to use the fast lift method. During installation/ decommissioning operations, the lifting beams are extended allowing platform topsides to be lifted several meters.
To ensure trouble-free operation offshore for many years, the cylinders have been designed with higher than normal levels of corrosion resistance, with components first undergoing NiCr80 / 20 plasma spray, followed by an AlTi plasma spray and two layers of a special coating to close the pores of the steel.
The final baked enamel finish and plated pistons for each cylinder are compliant with the NORSOK M-501 standard for surface preparation and protective coating, Enerpac adds.