A kind of seabed natural gas hydrate exploitation device and exploitation method

A mining method and technology for natural gas, which are applied in the fields of production fluids, earth-moving drilling, wellbore/well components, etc., can solve the problems of production shutdown, affecting the efficient development of natural gas hydrates, and reducing production.
CN108412466BActive Publication Date: 2019-12-20CHINA UNIV OF PETROLEUM (BEIJING)
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (BEIJING)
Publication Date
2019-12-20

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Abstract

The invention provides a submarine natural gas hydrate extraction device and method. The submarine natural gas hydrate extraction device comprises a sleeve. The bottom of the sleeve is in an opened state, and the top of the sleeve is provided with a gas extraction pipeline. A decomposing groove is formed in a sleeve body of the sleeve and provided with a feeding opening, and the top of the decomposing groove is in an opened state. Natural gas hydrate in the decomposing groove is decomposed to release gas containing natural gas and liquid containing decomposed water, the gas is constantly accumulated at the top of the sleeve to form air pressure, the liquid also constantly gushes through the decomposing groove, the air at the top of the sleeve is constantly gathered, and the air pressure isconstantly increased, so that the liquid gushing from the decomposing groove can be extruded from the bottom of the sleeve in an opened state to leave the extraction device and be drained into seawater. The submarine natural gas hydrate extraction device can realize gas-liquid-solid fast separation and gas extraction integrated production of natural gas hydrate mixed fluid, is simple in structureand convenient to use, and greatly reduces the extraction cost of the natural gas.
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Description

technical field

[0001] This manual belongs to the technical field of marine natural gas hydrate exploitation, and relates to a seabed natural gas hydrate exploitation device and exploitation method. Background technique

[0002] Natural gas hydrate is a special form of natural gas, commonly known as "combustible ice", which is an ice-like, non-stoichiometric clathrate crystal compound composed of water and natural gas under certain conditions. It is widely distributed, Due to its large scale and high energy density, it has attracted worldwide attention and is known as "future energy". Most of the natural gas hydrates are methane hydrates. Hydrate is one of the most promising and efficient clean energy sources, and every cubic meter of natural gas hydrate can release 164 cubic meters of methane. At present, CH in gas hydrates with a water depth of less than 3000 meters has been found. 4 The total amount of carbon is equivalent to twice the total amount of known coal, oil, ...

Claims

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