Seabed combustible ice filling mining device and mining method thereof

Abstract

The invention provides a seabed combustible ice filling mining device and a mining method thereof. The seabed combustible ice filling mining device comprises a mining platform and a grouting platform,wherein the mining platform is arranged on the sea surface of a combustible ice reservoir; a mining pipeline is arranged in a mining well; a mining device is arranged at the front end of the mining pipeline; one end of the mining device is provided with a high-pressure hot flow sprayer; and the other end of the mining device is provided with a grouting sieve pipe. The mining method of the seabedcombustible ice filling mining device comprises the following steps of Step 1, performing drilling operation by marine oil and natural gas drilling equipment; Step 2, performing well cementation and well completion on the mining well; Step 3, transforming a pre-mining face; Step 4, filling a goaf area; and Step 5, recovering the mining equipment. The combustible ice mining and the grouting platform grouting filling are performed at the same time; through filling, the underground pressure can be increased, and the natural gas extraction is promoted; and in addition, a filling material can achieve the support effect, so that the mining and the use of the combustible ice are convenient.

Description

technical field [0001] The invention belongs to the technical field of combustible ice mining methods, and in particular relates to a seabed combustible ice filling mining device and a mining method thereof. Background technique [0002] Combustible ice is also called "solid gas" or "air ice" because it looks like ice and can burn when exposed to fire. It is actually a solid block. Combustible ice is widely distributed in the permafrost of continents, slopes of islands, uplifts of active and passive continental margins, polar continental shelves, and deep water environments of oceans and some inland lakes in nature. [0003] However, the current mining methods of combustible ice mainly include in-situ decomposition method and solid mining method. Among them, the in-situ decomposition method of seabed combustible ice includes heating mining method, decompression mining method, carbon dioxide displacement mining method and chemical reagent injection mining method. There are m...

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Problems solved by technology

There are many technical problems in the mining of combustible ice on the seabed: on the one hand, the equipment for mining combustible ice often drifts due to ocean currents on the seabed during the mining process and cannot complete the mining work well; on the other hand, the process of mining combustible ice Among them, it is easy to damage the structure of the seabed and cause submarine geological disasters such as seabed subsidence and landslides, which will affect the mining and use of combustible ice

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