Patent ID: 8387703
Filing Date: 2013-03-05
Classification: B63B,E21B

Abstract:
1. A buoyancy can system for tensioning a plurality of top tension risers, the buoyancy can system comprising: a plurality of tubular cans coupled together and configured to move collectively as a single unit; wherein the plurality of tubular cans are coupled to the plurality of top tension risers and are configured to apply a tension load to each of the plurality of top tension risers; wherein each tubular can comprises: a pressurized gas system configured to selectably inject pressurized gas into one or more of the tubular cans; wherein, when the opening is open, the tubular can is ballasted by seawater; and wherein, when the opening is closed and pressurized gas is injected into the tubular can, the tubular can is de-ballasted of seawater.