A subsea natural gas hydrate production system and method

A mining method and hydrate technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problem of restricting the development of subsea natural gas hydrate mining field, unsuitable for joint mining of shallow seabed and seabed surface, and mining range Limited and other problems, to achieve the effect of improving energy utilization and work efficiency, improving energy utilization and wide mining range

CN108894755BInactive Publication Date: 2020-12-22SOUTHWEST PETROLEUM UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-12-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a seafloor natural gas hydrate mining system and method, and belongs to the technical field of new energy mining. The system comprises a natural gas hydrate mining device, a driving device, a natural gas hydrate purifying device, a seafloor pressurizing device, a pumping lifting device, an L-shaped pipeline and a collecting ship; the natural gas hydrate mining device comprises a cutter suction mining device and a flow jetting mining device; the mining method comprises the steps of driving mining of a suction vehicle, pressurizing of the seafloor pressurizing device, pressurizing mining of the flow jetting mining device, purifying of natural gas hydrate, mud and sand refilling, lifting of the pumping and lifting device and the collection of the collecting ship; a coarse separating device is arranged in the cutter suction mining device. The method in which two mining manners are combined is adopted, mud and sand in the natural gas hydrate are removed while miningis conducted, each working procedure is operated independently, the recovery ratio of natural gas hydrate is effectively improved, and the system has better application prospects.
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Description

technical field

[0001] The invention relates to the technical field of new energy exploitation, in particular to a seabed natural gas hydrate exploitation system and method. Background technique

[0002] Natural gas hydrate (combustible ice) is a clean and efficient new energy source with large storage capacity. It is widely distributed in deep sea sediments or permafrost on land. It is an ice-like ice-like gas formed by natural gas and water under high pressure and low temperature conditions. crystalline substance. The total amount of natural gas hydrate resources in the world is equivalent to twice that of known coal, oil and natural gas in the world, which can meet the current demand for energy markets. It will be the most important energy for mankind in the 21st century.

[0003] Both at home and abroad, the mining of natural gas hydrate is accelerating and deepening research. The existing methods for mining combustible ice of natural gas hydrate include: pyrolysis met...

Examples

Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] Such as figure 2 As shown, a subsea natural gas hydrate production system includes: a natural gas hydrate production device, a driving device, a natural gas hydrate purification device 7, a subsea pressurization device 8, a pumping lifting device 6, an L-shaped pipeline 11 and a collection ship 16 ;

[0046] The natural gas hydrate production device includes: the cutter suction production device, which crushes and collects the natural gas hydrate on the seabed surface through the cutter suction production method; mining and transportation;

[0047] The driving device is used to control the movement of the cutter suction mining device and expand the mining range of the cutter suction device;

[0048] The natural gas hydrate purification device 7 is used to purify the natural gas hydrate transported from the exploitation device, separate the se...