Integrally equipped heavy draught floating type oil production platform with unconditional stability and offshore installation method thereof

An integrative deep draft floating production platform with unconditional stability, characterized in that:

• it includes an ring ballast tank at the bottom, some small-cross-section columns on the ring ballast tank, a middle ring buoyancy tank with the same or similar shape as the ring ballast tank, some large-cross-section columns with the same number as the small-cross-section columns and located on the ring buoyancy tank, and a drilling rig and oil gas processing module on the top of the large-cross-section columns;
• wherein the ring ballast tank adopts a permanently fixed ballast, and the tank is internally filled with weights to ensure that the center of buoyancy of the platform is higher than the center of gravity;
• the large-cross-section columns are uniformly arranged on the ring buoyancy tank and the lower parts thereof are integrated with the ring buoyancy tank;
• each large-cross-section column is provided with a central pore canal axially, wherein the lower part in the central pore canal is provided with a chopping board connection structure with a groove;
• corresponding to the large-cross-section columns, the small-cross-section columns are uniformly arranged on the ring ballast tank and the lower parts thereof are integrated with the ring ballast tank;
• after the construction of the platform is completed, the small-cross-section columns are inserted into and pass through the central pore canals of the large-cross-section columns correspondingly, and the small-cross-section columns are integrated with the large-cross-section columns via wedges, bolts, or pins while the platform is in a folded state;
• each small-cross-section columns is provided with a reverse-cone structure on the top;
• each large-cross-section columns is provided with a group of mooring lines which are connected to anchor on the seabed via a traditional mooring means;
• the drilling rig and oil gas processing module are installed at a construction site, and the platform is transported to the installation site by a dry tow or wet tow as a whole to then be installed.