Pipe conveying device of natural gas hydrate

A natural gas and hydrate technology, applied in wellbore/well components, construction, production fluids, etc., can solve the problems of no large-scale natural gas hydrate commercial exploitation practice, changeable seabed environment, etc., to ensure operation continuity and difficult The effect of damage and production cost saving

Inactive Publication Date: 2016-05-04
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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.

Method used

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  • Pipe conveying device of natural gas hydrate
  • Pipe conveying device of natural gas hydrate
  • Pipe conveying device of natural gas hydrate

Examples

Experimental program
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Effect test

Embodiment

[0029] An example flow of the method of the present invention is: the natural gas hydrate on the seabed is in a stable state under the seabed environment, and when the external environment changes, the natural gas hydrate will decompose from solid to liquid and gaseous. The natural gas hydrate collected on the seabed is usually a gas-liquid mixture, and a certain amount of sediment is generally mixed in the mixture. The natural gas hydrate pipeline transportation device of the present invention separates the natural gas hydrate mixture from solid-liquid to gas underwater, and then transports the separated natural gas and water to the sea surface.

[0030] Firstly, the steady state of natural gas is changed by decompression method, the natural gas hydrate mixture containing sediment is collected and transported to the hydrocyclone, and the sediment in the mixture is removed by centrifugal force separation, and the natural gas hydrate mixed liquid to be treated is extracted from ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/36E21B43/01
CPCE21B41/0099E21B43/01E21B43/36
Inventor 王川黎俊王国荣谢真强周旭
Owner SOUTHWEST PETROLEUM UNIV
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