Seabed gas hydrate mining methods and device

A mining method, natural gas technology, applied in the direction of fluid mining, mineral mining, earth drilling and mining, etc., can solve problems such as unsuitable for mining, and achieve the effect of convenient connection, avoiding pollution, and simple method

Inactive Publication Date: 2008-05-21
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Description
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Problems solved by technology

However, most of the gas hydrates on the seafloor are formed on the surface of the seafloor, and the above three methods are not suitable for the exploitation of hydrates on the seafloor surface

Method used

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  • Seabed gas hydrate mining methods and device

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Embodiment Construction

[0031] The seabed natural gas hydrate exploitation method provided by the present invention comprises the following steps:

[0032] (1) Transport the natural gas hydrate on the seabed surface to the ore relay station;

[0033] (2) Use the slurry pump to transport the natural gas hydrate from the ore relay station to the offshore mining platform step by step;

[0034] (3) Grinding the natural gas hydrate transported to the offshore mining platform and sending it into a large-volume container;

[0035] (4) Add seawater to the large-volume container, utilize the temperature of seawater to fully decompose the pulverized mixture in the large-volume container, and separate natural gas, water and sand;

[0036] (5) Discharge the separated natural gas through the nozzle on the upper part of the large-volume container to the user end, and discharge water and sand into the seabed through the pipeline at the bottom of the large-volume container.

[0037] The structure of the seabed nat...

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Abstract

The present invention provides a method and a device for exploiting the submarine natural gas hydrate. The present invention transfers the natural gas hydrate on the submarine surface to a dredge and then to a large-volume container after being ground; a water pump is used to add sea water appropriately into the large-volume container. As the temperature of the sea water keeps about 20 DEG C, the temperature of the sea water makes the mixture of ground hydrate and sandstone fully decomposed in the large-volume container so as to separate the natural gas, water and sandstone. The separated natural gas is drained and then directly connected with a user terminal. The present invention with convenient operation and simple device can conveniently, economically and effectively achieve the exploitation of the submarine natural gas hydrate.

Description

technical field [0001] The invention relates to a seabed natural gas hydrate exploitation method and device, belonging to the field of natural gas exploitation. Background technique [0002] At present, there are many studies on the reserves and physical and chemical properties of hydrates, but there are relatively few studies on hydrate mining theory and mining methods. However, most gas hydrate "resources" are very difficult to exploit due to their low reserves and enrichment. From the perspective of exploitation technology, the exploitation of natural gas hydrate and its formation are inverse processes, that is, to exploit hydrate, the natural gas hydrate can be transported to the ground in solid form, and then decomposed into natural gas for delivery to users. However, the most direct way is to decompose hydrate into gas in the hydrate production reservoir and transport it directly to users through pipelines. To extract natural gas from gas hydrate reservoirs, the foll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C50/00
CPCE21C50/00E21B2043/0115E21B41/0099
Inventor 窦斌吴翔蒋国盛张凌宁伏龙
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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