Deepwater floating type multifunctional dry tree semi-submerged platform and marine installation method thereof

Abstract

The invention relates to a deepwater floating type multifunctional dry tree semi-submerged platform and a marine installation method of the semi-submerged platform. The semi-submerged platform comprises a main hull, an upper component block and a group mooring system. The main hull comprises an upper floating body, a lower floating body and a telescopic connecting vertical column, wherein a ballast tank and a functional cabin are arranged in the upper floating body, a channel allowing a tension type vertical pipe, a production vertical pipe and / or a drilling vertical pipe to pass through conveniently is formed in the middle of the lower floating body, and the upper floating body and the lower floating body are connected through the telescopic connecting vertical column. The main hull can be switched between a folded state and an unfolded state through the telescopic connecting vertical column, and the lower floating body is located next to the lower portion of the upper floating body in the folded state, and the lower floating body keeps a certain distance from the upper floating body in the unfolded state. The upper component block is installed on the upper portion of the upper floating body and comprises upper facilities. The group mooring system comprises multiple mooring ropes which are connected with the upper floating body. The deepwater floating type multifunctional drytree semi-submerged platform is simple in technique, low in installation cost and capable of being widely applied to oil-gas field development under a deepwater marine environment condition.

Description

technical field [0001] The invention belongs to the technical field of deep-water marine oil and gas development, and in particular relates to a deep-water floating multifunctional dry tree semi-submersible platform and an offshore installation method thereof. Background technique [0002] Deepwater floating platform is the main equipment for deepwater offshore oil and gas development. In recent years, a variety of floating production platforms have emerged for deepwater offshore oil and gas development, including semi-submersible platforms, deep-draft single-column platforms, and tension-leg platforms. Among them, the heave motion performance of the semi-submersible platform is poor. As a deep-water oil and gas development and production platform, a wet tree must be used, and the wet tree technology is complicated and expensive; the deep-draft single-column platform has good motion performance and can Dry mining, but the upper and lower parts of the deep-draft single-colum...

AI Technical Summary

Problems solved by technology

Condensate oil resources generally need to be transported through pipelines, but laying a separate deepwater condensate oil pipeline is expensive and economical; if the deepwater floating platform has the function of condensate oil storage, the project cost will be greatly reduced

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