Floating type platform with underwater storage tank

Abstract

The invention provides a comprehensive platform with a floating type full concrete structure with an underwater storage tank for well drilling, well workover, production, public use and household. The platform has 12 different modes, and each mode consists of a liquid storage system, supporting legs, an upper facility and an anchoring leg positioning system. The platform not only has a series of characteristics and advantages, such as SPAR platform heavy draught, small waterplane area, higher center of buoyancy than center of gravity, platform natural period more than the wave period corresponding to once-in-a-century significant wave height and the like, has the function of liquid (oil) storage, and maintains the draught depth of the platform in the process of oil storage and discharge operation unchanged. The platform matched with a single-point or multi-point anchoring device can form a complete development system for production, well drilling, well workover, storage and outward transportation of offshore petroleum and natural gas; the platform not only can be used for development of an offshore large and deepwater oil-gas field with long production life, but also can be used for a small and deepwater oil-gas field with short production life, in particular the development of a marginal oil-gas field. After development of the oil-gas field is finished, the platform can be transferred and reused conveniently.

Description

Technical field [0001] The invention relates to a deep-water floating platform with comprehensive functions of drilling, oil production and oil storage (liquid) required for offshore oil and gas development. The present invention is the third divisional application of the PCT application "liquid underwater storage and transportation device and offshore platform based on it" that the applicant is about to declare. Background technique [0002] At present, there are three main and most commonly used types of oil and natural gas floating production platforms in Shanghai, namely tension leg (TLP) platforms, SPAR platforms and semi-submersible platforms. They usually do not have oil storage functions, and all have cost High, long construction period and high maintenance costs. The water surface area of ​​these three kinds of platforms is all relatively small, and most of the floating body is all submerged underwater, so the hydrodynamic characteristics are all quite good. The t...

AI Technical Summary

Problems solved by technology

In short, existing floating platforms with good hydrodynamic characteristics, suitable for deep water, and dry wellheads, such as TLP

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