Heavy-draft truss upright-column combined platform

Abstract

The invention relates to a heavy-draft truss upright-column combined platform which is characterized by comprising a regular-polygon or subregular-polygon annular ballast compartment, a plurality of vertical upright columns, a drilling machine and an oil gas processing module, wherein the vertical upright columns are positioned at the angular points of the annular ballast compartment, and the drilling machine is positioned on the top of the upright columns; the annular ballast compartment adopts a permanent ballast mode, and a weight is filled in the compartment, thereby ensuring that the center of buoyancy of the platform is higher than the center of gravity of the platform; the lower parts of upright columns are connected with the annular ballast compartment to form an integral body, the upper part of each upright column is in a cylinder or subterete shell structure, the lower part of the upright columns adopts a truss structure, and the middle parts of every two adjacent upright columns are connected through a buoyancy tank structure which can provides sufficient buoyancy force for the platform; and each upright column is provided with a set of berthing ropes, and the berthing ropes are connected to benthonic anchor points in a traditional anchoring mode. The invention has the advantages of favorable moving performance, wide applicability for operating water depth, high strength of the monolithic construction, light weight and low construction cost, and can be used for deep water oil gas exploitation in severe marine environments.

Description

technical field [0001] The invention relates to a floating oil production platform, in particular to a deep-draft truss-column combined platform with unconditional stability for deep-water offshore oil and gas development. Background technique [0002] With the development of offshore oil and gas moving into deep water, the traditional fixed oil production platform can no longer meet the needs of offshore deep water oil and gas development, and the floating oil production platform has become the main equipment for offshore deep water oil and gas development. In recent years, a variety of floating oil production platforms for offshore deepwater oil and gas development have been produced, which are widely used in the development of deepwater oil and gas fields around the world, such as semi-submersible platforms, deep-draft single-column platforms and tension leg platforms. Each of the above-mentioned platforms has its advantages and disadvantages: semi-submersible platforms h...

AI Technical Summary

Problems solved by technology

Each of the above-mentioned platforms has its advantages and disadvantages: semi-submersible platforms have poor heave motion performance, and wet-type trees must be used as deep-water oil and gas development and production platforms, and wet-type trees are complex in technology and expensive; The post platform has good motion performance and can be used with a dry Christmas tree, but it has the disadvantages of small upper deck area, difficult design, and difficult layout of oil and gas treatment facilities; the tension leg platform also has good motion performance, but due to its use The tension leg is connected to the seabed foundation, and its cost increases rapidly with the increase of water depth

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