Underwater flexible storage device and use method

Abstract

The invention relates to an underwater flexible storage device and a use method. The device comprises: a flexible bag which is configured to be arranged in a rigid shell in a contraction or expansion mode, wherein an inner containing cavity of the flexible bag is used for storing liquid, a stored liquid inlet and outlet is formed in the flexible bag, the stored liquid inlet and outlet is communicated with the inner side of the flexible bag in a sealed mode from the outer side of the rigid shell, and the flexible bag is of a horizontal structure; and a rigid shell which comprises a shell body, wherein an inner containing cavity of the rigid shell is larger than the volume of the flexible bag when the flexible bag is filled, the rigid shell comprises a seawater inlet and outlet and a pressure relief opening, and the seawater inlet and outlet and the pressure relief opening are communicated with the outer portion of the rigid shell and the space between the outer side of the flexible bag and the inner side of the rigid shell. The device is good in deepwater adaptability, high in safety, good in stability and light and flexible in overall structure.

Description

technical field [0001] The invention relates to the technical field of underwater liquid medium storage such as petroleum or chemical agents, and in particular relates to an underwater flexible storage device and a use method. Background technique [0002] With the continuous exploration of offshore oil fields, the exploitation scope of offshore oil fields has gradually expanded to the ocean. Therefore, in response to the needs of submarine crude oil production facilities, it is necessary to set up storage structures on platforms or seabeds to store crude oil or chemicals. At present, the storage facilities mainly used in the sea mainly include gravity oil storage platforms, Spar platforms, jack-up production platforms and underwater oil storage tanks. However, the working water depth of the gravity oil storage platform is relatively shallow, which cannot meet the needs of deep sea storage, and the cost is expensive and the storage volume selection is not flexible enough. ...

AI Technical Summary

Problems solved by technology

Although the underwater oil storage tank is economical, it is still not suitable for deep sea storage due to its structural limitations, and there is a shortcoming that the storage medium is easily polluted

[0003]There are currently some flexible underwater oil and gas storage devices, which are difficult to maintain effectively due to their large volume, lack of flexibility, and inability to adapt to the pressure in the storage process Changes, or failure to provide secondary protection after leakage

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