Deep draft dry-tree oil storage semisubmersible production platform

Abstract

The invention discloses a deep draft dry-tree oil storage semisubmersible production platform characterized by comprising columns, buoyancy tanks, and a topside module; the four buoyancy tanks are arranged on the bottom periphery of the semisubmersible production platform; the break angle between two adjacent buoyancy tanks is provided with the column; the top surfaces of the four columns support and are connected with the topside module; an oil tank is arranged in each column; a first ballast tank is respectively arranged on and below the oil tank in each column; the top of each column is provided with an equipment chamber; a void chamber is formed between the first ballast tank on the oil tank and the equipment chamber; a second ballast tank is arranged in each the buoyancy tank. The semisubmersible production platform uses the first ballast tanks to balance the oil tank crude oil amount changes, uses the second ballast tanks to ensure the whole production platform to have the draft depth at 50-60m, thus ensuring the whole platform to keep small moving amplitude and small heaving amplitude, satisfying SCR and dry-tree oil extraction requirements, and reducing engineering investments.

Description

technical field [0001] The invention relates to a deep-draft dry tree oil storage semi-submersible production platform, which belongs to the field of offshore oil development. Background technique [0002] With the development of offshore oil and gas development technology, semi-submersible platforms have been widely used. Among them, about 2 / 3 of the floating platforms in deepwater oil and gas development facilities around the world are semi-submersible platforms. The traditional semi-submersible platform is usually used as a production platform. The upper deck block is arranged with oil, gas and water treatment facilities, and the hull is arranged with ballast tanks and a small number of equipment compartments. Since the motion performance of the traditional semi-submersible platform is not as good as that of TLP and SPAR platforms, in the vertical The choice of pipe form and the way of drilling and completion are limited: SCR standpipes with lower cost cannot be used, dry...

AI Technical Summary

Problems solved by technology

The traditional semi-submersible platform is usually used as a production platform. The upper deck block is arranged with oil, gas and water treatment facilities, and the hull is arranged with ballast tanks and a small number of equipment compartments. Since the motion performance of the traditional semi-submersible platform is not as good as that of TLP and SPAR platforms, in the vertical The choice of pipe form and the way of drilling and completion are limited: SCR standpipes with lower cost cannot be used, dry tree oil production equipment cannot be used, only hoses and wet oil production can be used

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