An unsuccessful floatover operation in August 2013 caused structural damage to the barge and the jacket, necessitating an overhaul of the floatover system.
Ashburn Offshore Oil & Gas Equipment & Engineering Co. contracted Trelleborg to design and fabricate eight leg mating units (LMUs), comprising four inner legs and four outer legs, and floatover fenders.
To accommodate the 12,500-metric ton (13,779-ton) topsides, each LMU was designed with a load capacity of 1,800 metric tons (1,984 tons).
Julian Wee, managing director of Trelleborg’s engineered products operation in Singapore, said: “We supplied our customized sway and surge fenders to absorb any kinetic forces the floatover barge would exert on the jacket.
“This ensured that the floatover process, especially when installing the topside onto the jacket, was completely safe for both the topside and jacket structures. In conjunction with our fenders, our…LMUs were easily able to support the weight of the topside and maintain stability during installation, even in high sea swell conditions.”