Patent ID: 8967912
Filing Date: 2015-03-03
Classification: B63B,E21B

Abstract:
1. A method of installing a subsea support buoy at a subsea foundation and tensioning tethers for anchoring the subsea support buoy, wherein the subsea support buoy is adapted for supporting at least one oil or gas production riser, the method comprising the steps of: floating the subsea support buoy over the subsea foundation; hanging one or more tethers off the subsea support buoy such that each tether is suspended vertically from the subsea support buoy towards the subsea foundation, each tether being provided with a tensioning apparatus at the subsea support buoy for tensioning the tether; coupling the tensioning apparatus for said each tether to a support bracket of the subsea support buoy, wherein said each tether is secured to a tether holding arrangement of the tensioning apparatus for said each tether; connecting each tether to the subsea foundation; and tensioning each tether with the tensioning apparatus provided for said each tether, wherein the tensioned tether pivots about an articulated support on the subsea support buoy.