Offshore platform with external vessel

Abstract

The invention relates to a stationary or floating offshore platform (1) comprising: a workshop (1b) for handling on the deck (1a) of said platform a hazardous and / or corrosive first liquid ( 2a), preferably liquefied natural gas (LNG); and at least one storage tank (2) for storing said first liquid (2a), preferably liquefied natural gas, integrated into said deck (1a) below said deck (1a) In the hull (1g) of said platform, the platform comprises: at least one container (3) located on the outside of said platform and at least partially, preferably completely, on which said workshop is supported Below the deck (1a) of the platform to which the container is preferably reversibly attached, the deck includes or supports a first transfer device (4), which is particularly capable of Leaking liquid (2a') is diverted from at least a part of said plant to said container in the event of a spill.

Description

technical field [0001] The present invention provides a support device installed on the sea (high seas or protected areas such as ports) in a grounded or floating manner (that is, placed on the seabed or anchored to the seabed). The support device includes: a facility for processing a hazardous and / or corrosive liquid, preferably liquefied natural gas (LNG); and at least one storage tank for storing said liquid and integrated into said support means located in the hull below the deck. [0002] A support unit of this type may especially be a barge of the FPSO or FSRU type for processing and storing LNG, or it may be a ship, especially as described in WO 01 / 30648, with a hull made of steel or concrete and a storage Tank ships, as explained below. Background technique [0003] Methane-based natural gas is a small or moderately productive oilfield by-product usually associated with crude oil, or a major product of natural gas fields, in which methane-based natural gas is found...

AI Technical Summary

Problems solved by technology

Such special steels are very expensive and generally they are not used for support elements or for the structures of FPSOs, which are usually made of ordinary steel

However, such common steels become brittle when they come into contact with very low temperatures, and they lose their mechanical strength, so there is a risk that structural elements will break and, if leaked directly onto said deck, may even cause The deck of the FPSO breaks unless critical parts are protected by insulation that itself withstands freezing temperatures very well

[0015] 3. Since the low temperature LNG (-165°C) is suddenly heated by seawater at a temperature in the range of 10°C to 20°C, and in the presence of air (and thus oxygen), the contact between LNG and seawater will Very dangerous with a high risk of immediate explosion

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