DDMS deep draft column platform

Abstract

The invention discloses a DDMS heavy draught upright post platform, which belongs to the technical field of ocean engineering and ship engineering, and is applicable to oil gas drilling and producing of an abyssal sea area. The upright post platform is characterized by consisting of four heavy draught upright posts, an upright post of a center well, a heave plate, a transverse pontoon bridge, a soft cabin, an anchoring system, a riser system and a platform upper part, wherein the four heave draught upright posts are arranged on four angular points of a cross section of the platform; the upright post of the center well is arranged in the center of the cross section; a K-shaped beam is arranged on the top of a hard cabin to connect the upright posts and the center well; the heave plate and the hard cabin of the platform are directly integrated into a whole, and are horizontally arranged on the upright posts; the transverse pontoon bridge is arranged on the bottom of the hard cabin to connect each upright post; and the soft cabin in large volume is arranged on the bottom of the platform and is filled with ballast weight. The platform has the advantages that building difficulty and cost of the platform are lower; the structure of the center well makes the upright posts protected; elasticity of global design and use space of the platform upper part are larger; hydrodynamic performance can be improved, so the platform has excellent motion performance; application of a dry-type tree is supported; and the platform is applicable to various conditions of different sea areas and sea conditions.

Description

technical field [0001] The invention belongs to the technical field of ocean engineering and ship engineering, and relates to a DDMS (Deep Draft Multi-Spars) deep draft column platform, which is suitable for oil and gas drilling and production in deep sea areas. Background technique [0002] At present, the main types of deepwater platforms in the world are semi-submersible SEMI, tension leg TLP and Spar. After decades of development, semi-submersible platforms have become relatively mature in terms of design and construction technology. Currently, more than 90 platforms have been used for deepwater drilling. However, the motion performance of the semi-submersible platform is not as good as that of the tension leg and Spar platform, and it does not support the dry tree system. The draft of the semi-submersible platform is relatively shallow, and the center of gravity is above the center of buoyancy. The stability problem under extreme sea conditions cannot be ignored. [0...

AI Technical Summary

Problems solved by technology

In 2004, the third-generation multi-column platform CellSpar was born. The lower construction difficulty and cost are its biggest advantages, but the effective load is limited

Although the Spar platform has the advantages of good stability and motion performance, it is difficult to construct, the upper body space of the platform is narrow, the effective use area is small, and the vortex-induced vibration of the main body is obvious, which has also attracted people's attention.

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