Before a module is slipped onto a barge for transport and eventual offshore installation, the module is weighed to verify the module weight. To accomplish the weighing operation, weighing cans underneath the module at the (typically) tubular members are outfitted with jacking lugs under which load cells and massive hydraulic jacks are installed. As the module is lifted away from the support beams, the load cells record the weight of the module.
The 2005 Atlantic hurricane season was perhaps the most damaging ever. Due to the intensity and resulting damage, five names were retired: Dennis, Katrina, Rita, Stan, and Wilma. It was the first season to end with names well into the Greek alphabet (in January!). The cost of the 2005 season was estimated at $128 billion. The 2008 season was also active, with retired hurricane names Gustav, Ike, and Paloma. The damage to GOM assets was extensive. Several platforms were completely lost (mini-TLP Typhoon) and hundreds were damaged. Of particular concern was the observed significant wave height during these large storms. Waves were breaking over the cellar decks and damaging the support structure. After the storm, cellar deck support beams on many platforms exhibited damage from these large waves.
A brace separated from the chord on an offshore platform during a hurricane. Our client developed a novel repair involving a clamshell-like clamp. We were asked to develop a detailed finite element model of the clamp halves, the grout, the chord, and the brace so that the fatigue life of the design could be determined.
The cost of dismantling oil production facilities in the UK North Sea over the next decade will be higher than previously forecast as more fields are scheduled to halt production. One such decommissioning activity involved lifting the platform from the ID of the piles using a custom lifting device. Of primary concern was the ability of the grout in the annulus between the pile and the sleeve to transfer the shear without failing.