Covered deep sea mud volcano type natural gas hydrate mining system and its method

摘要

PROBLEM TO BE SOLVED: To obtain a covered deep sea mud volcano type natural gas hydrate mining system and a method thereof. The present invention is used for submarine mud volcano type superficial massive hydrate, adopts a method by covering type heat insulation heating based on the reserve characteristics of deep sea mud volcano type hydrate, and has a specially designed gas barrier heat insulating shield and heat. Natural gas hydrate is mined by heating with a pole, and the decomposed hydrate flows into the production well from the drilling of the production well under the differential pressure action of the bottom of the mine, and the hydrate is hydrated by the decompression device installed in the production well. Is further decomposed. This proposal can effectively overcome the drawbacks of a small heating range, high energy consumption, and low productivity during hydrate mining by the heating method, and can greatly improve mining efficiency. At the same time, the conventional method of excavating a wide area of the seabed can effectively avoid the possibility of causing environmental risks and ecological disasters. In addition, since solar energy is used on-site, it is low-cost, environmentally friendly, realizes large-scale, highly efficient and economical mining of hydrate, and has high potential and value in application. [Selection diagram] Fig. 1