SPAR platform hard tank

Abstract

The invention discloses an SPAR platform hard tank comprising a central column and peripheral columns distributed around the central column; wherein, the diameter of the central column is bigger than that of the peripheral column, and the size of the central column is suitable for arranging a central well; top decks of the peripheral columns are arranged below the still water level, and the amount and the diameter of the peripheral columns can be determined by buoyancy needed by the SPAR platform or the SPAR platform hard tank. The invention is characterized in that the top decks (1) of the peripheral columns (7) can be horizontal plane or can be arranged in slope. The invention can lower building difficulty and cost, satisfies the condition of arranging the central well, and realizes that a TTR vertical pipe is adopted to carry out oil extraction operation; meanwhile, wave-current force to the SPAR platform in the horizontal direction is reduced, and the requirements and cost for an anchoring can be lowered. The invention is suitable for relevant fields such as naval architecture, ocean engineering and the like and is suitable for explorations of petroleum, natural gas and the like from deep water sea areas to extremely deep water sea areas.

Description

Technical field: [0001] The invention relates to a marine SPAR platform technology, in particular to the design of the hard cabin of the SPAR platform. Background technique: [0002] SPAR platform is a kind of offshore oil platform. It is widely used in deep sea from 300 meters to 3000 meters. It can be used for various tasks such as oil and gas exploitation, drilling and workover, oil and gas treatment, oil storage and loading and unloading. It has good practicality. It has been widely used in the world due to its high performance and economy, and is internationally recognized as the development direction of the next-generation deepwater SPAR platform. The part of the main body of the SPAR platform from the top deck of the main body to the bottom of the variable ballast tank is called the hard tank. The hard tank has the function of providing buoyancy and adjustable ballast, and is an important part of the SPAR platform. [0003] At present, offshore oil production tends ...

AI Technical Summary

Problems solved by technology

However, the too small cylinder diameter of the multi-column hard tank cannot provide enough area for the central well, so the central well cannot be opened, so that the riser cannot vertically pass through the SPAR platform from the oil production module on the upper part of the SPAR platform to the seabed, so that the TTR vertical can not be used. tube, only SCR riser can be used

The SCR riser is a kind of flexible riser. The use of SCR riser for oil production needs to be equipped with a subsea wellhead at the same time. This kind of oil production method is expensive and extremely inconvenient to construct and maintain, which increases the cost of oil production and maintenance.

Images