Pipe conveying device of natural gas hydrate

Abstract

The invention discloses a pipe conveying device of natural gas hydrate. The pipe conveying device comprises a downhole casing, a hydrocyclone, an ESP tank-shaped container system and a pipeline route exchanging system; the hydrocyclone, the ESP tank-shaped container system and a pipeline route exchanging device are sequentially connected from bottom to top and are fixed into the downhole casing; the hydrocyclone comprises a whirlcone liquid inlet, a whirlcone overflowing opening, a whirlcone conical body and an underflow opening; the ESP tank-shaped container system is divided into an upper portion and a lower portion by a partition plate and comprises a container inlet, a liquid discharging pump motor, a gas-liquid separator and a liquid discharging pump; the pipeline route exchanging system comprises a fluid input pipe, a packer, the pipeline route exchanging device, a gas conveying pipe and a liquid conveying pipe. By means of the hydrocyclone, the ESP tank-shaped container system and the pipeline route exchanging device, solid-liquid-gas three-phase separation of the natural gas hydrate is achieved, natural gas is collected and conveyed to the sea surface, meanwhile the solid phase and the liquid phase are discharged, and exploitation efficiency is improved.

Description

technical field [0001] The invention relates to the field of marine natural gas hydrate equipment, in particular to a pipeline transportation device for natural gas hydrate. Background technique [0002] Natural gas hydrate, also known as combustible ice, is an ice-like crystalline substance formed by natural gas and water under high pressure and low temperature conditions. It is an unconventional energy source with high density and high calorific value1m 3 Gas hydrates can release 64m 3 methane gas and 0.8m 3 water), natural gas hydrate has high methane content, and the combustion pollution is small. [0003] Natural gas is mainly distributed in the ocean and terrestrial permafrost deposits with a water depth greater than 300m. Marine gas hydrates are usually buried at 0-1100m below the seabed, and the ore layer is tens of centimeters to hundreds of meters thick. 10,000 square meters, and its resources are more than 100 times that of land tundra. It is estimated that t...

AI Technical Summary

Problems solved by technology

Because of the above-mentioned technical difficulties, and due to the variability and complexity of the seabed environment, there is currently no large-scale commercial exploitation of natural gas hydrates.

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