Three-floating-body type semi-submersible platform

Abstract

A three-floating body type semi-submersible platform comprises an upper portion platform and lower floating bodies which extend along the upper portion platform longitudinally; vertical columns are connected between the upper portion platform and the lower floating bodies; the lower floating bodies are floating cylinders which are in slender shapes; three floating cylinders are horizontally arranged along the upper portion platform; the central line of the middle floating cylinder and the longitudinal section of the upper portion platform are in the same plane; the two outside floating cylinders are symmetrically arranged on bilateral sides of the middle floating cylinder; at least two vertical columns are connected between the upper portion platform and every floating cylinder; the vertical columns are arranged along the longitudinal direction of the floating cylinders in an interval mode; the middle floating cylinder and the two outside floating cylinder or the vertical columns on the middle floating cylinder and the vertical columns on the two outside floating cylinders are respectively connected through at least two horizontal supports. The three-floating body type semi-submersible platform has the advantages of being high in integral strength and rigidity, stable in stormy weaves and suitable for shallow water environment, enabling the integral strength and rigidity of the platform to be guaranteed and enabling platform stability in the stormy weaves when being a large sized platform with the size of several hundred meters to be guaranteed due to the fact of a three-floating-body type arrangement structure.

Description

technical field [0001] The invention relates to an offshore floating platform, in particular to a semi-submersible platform that adopts three lower floating bodies and is suitable for shallow water environments. Background technique [0002] The semi-submersible platform is also called column-stabilized platform, which has strong wind and wave resistance, good stability, wide range of water depth and large loading capacity, and is widely used in drilling and mining of offshore oil and gas resources. The semi-submersible platform is mainly composed of the lower floating body (or caisson), the middle column and the upper platform. The upper platform is the carrier of living and working places and equipment. The column is connected between the upper platform and the lower floating body to play a supporting role. The lower floating body controls the platform. The depth of submersion. Most of the existing semi-submersible platforms are deep-water types, and their structural char...

AI Technical Summary

Problems solved by technology

When the floating body of the semi-submersible platform is submerged in the water under operating conditions, the distance between it and the upper platform must be much greater than the maximum wave height in the sea area where it is located. Therefore, for the deep-water semi-submersible platform, the column is very high, and the height of the entire platform is very large. The length and width of the platform are basically similar. If the platform is large, its self-weight and displacement will be large, which will lead to large inertia force and strong wind and wave force. When the length or width of the platform reaches hundreds of meters, it will be due to The large distance between them will affect the structural strength of the platform. Therefore, the platform with a large size is prone to flexible deformation due to insufficient structural strength, which in turn affects the use function of the platform. Therefore, traditional deep-water semi-submersible platforms are usually medium-sized platform, not suitable for larger platforms, and cannot be used in shallow water environments

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