Cutter exploitation method of seabed natural gas hydrates

Abstract

The invention provides a cutter exploitation method of seabed natural gas hydrates. The method employs a seabed exploitation vehicle, a sea level decomposition and storage system, and a waterpower conveying system for connecting the seabed exploitation vehicle as well as the sea level decomposition and storage system. The seabed exploitation vehicle comprises a reamer, a reamer arm, a crawler type running gear as well as a power and control system, and the like, and is used for cutting and fragmenting the seabed natural gas hydrate. The waterpower conveying system comprises an auxiliary slurry pump, a conveying flexible pipe, a buoyancy ball, a main slurry pump, a conveying hard tube, and the like, and the system is used for conveying the natural gas hydrates which is fragmented by the exploitation vehicle to the sea level decomposition and storage system. The decomposition and storage system comprises a decomposer, a storage container, a mine tailing pipe, and the like, and is used for decomposing and separating the natural gas hydrates which are conveyed by the conveying system and collecting the natural gas hydrates in the storage container, and the separated seabed deposits and other refuses are discharged to the seabed. The cutter exploitation method of seabed natural gas hydrates has high production efficiency and controllable exploitation process, 'air bag' and the like are not needed to construct, and the method has good application prospects.

Description

technical field [0001] The invention relates to a submarine natural gas hydrate cutter extraction method, in particular to a method for firstly cutting and crushing the natural gas hydrate existing on the seabed by a submarine cutter suction mining vehicle, and secondly, using a hydraulic conveying system to crush the natural gas hydrate The natural gas hydrate is transported from the seabed to the decomposer in the sea surface decomposition storage system, and then the natural gas hydrate is decomposed into natural gas through the decomposer and collected into the storage. Background technique [0002] Energy is the basis for sustainable economic development, and the depletion of traditional energy is always threatening human development, which forces countries around the world to look for more efficient and cleaner alternative energy. In order to develop new energy sources, in recent decades, more and more countries have turned their attention to a little-known new energy ...

AI Technical Summary

Problems solved by technology

[0013] Depressurization mining method, thermal stimulation mining method, chemical reagent injection method and CO 2 The replacement method can only be exploited for part of the gas hydrate with dense overburden, and the depressurization method, thermal excitation method, chemical reagent injection method and CO 2 The displacement method has difficulties that cannot be overcome in the short term, such as: the depressurization mining method is slow and the mining process cannot be controlled; the thermal excitation mining method has low energy efficiency; the chemical reagent injection method has slow effect and high cost; CO 2 The phase change process of the replacement method is complex and difficult to implement, and the above-mentioned mining methods may cause accidents such as submarine landslides, marine chemical and biological environmental pollution, etc.

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