FIELD: transport.
SUBSTANCE: invention relates to platforms for underwater oil extraction in zones of extreme sea and weather conditions. Platform 10 comprises a detachable anchoring system 1, 2, 3 to anchor lines 13 at sea bed and connection pipes 14 thereat. Anchoring system comprises mooring buoy 1 for anchor lines and pipelines of connection with sea bed. Note here that said buoy is a circular element. Turntable 2 extends inside cavity 4 crossing the floating platform hull over its entire height. Said mooring buoy is secured at turntable 2 under platform hull. Turntable 2 comprises tight external structure 2b with bottom 2c tightly connected with lower end of external structure 2b. Tubular external structure 2b incorporates internal structure 2a jointed with deck level with its top end 2a1. Internal structure and tubular external structure interact, on one side, with one lower rolling bearing or slider bearing to allow rotation of internal structure without that of external structure when the platform is driven around cavity vertical axis ZZ' and tight tubular outer structure. Lower rolling or slider bearing 51, 52 is located above water surface inside tight external structure.
EFFECT: simplified and reliable design, improved servicing conditions of rolling bearings.
10 cl, 8 dwg
