A crushing device for natural gas hydrate development

Abstract

The invention relates to a crushing device, in particular to a crushing device for natural gas hydrate exploitation, which belongs to the technical field of natural gas hydrate exploitation. The main body of the ice nail is driven by the electric push rod to screw into the natural gas hydrate layer, which increases the support reliability and stability of the whole device, so that the weight of the whole device does not need to be too large; the screw hammer head rotates and impacts the natural gas hydrate downward at the same time The lower end of the conical section of the spiral hammer first hammers into the natural gas hydrate layer, and then the part with larger and larger diameters enters the natural gas hydrate layer, and squeezes the cracked natural gas hydrate layer around the conical section again , expand the crack area of ​​the natural gas hydrate layer, and the downward impact of the screw hammer will vibrate the natural gas hydrate layer, and the crushing efficiency is high; when the casing and the screw hammer ice mechanism move horizontally along the long screw rod, the screw hammer will With the movement of the shell, it can break a larger range of natural gas hydrate layers, and the breaking range is wide.

Description

technical field [0001] The invention relates to a crushing device, in particular to a crushing device for natural gas hydrate exploitation, which belongs to the technical field of natural gas hydrate exploitation. Background technique [0002] Natural gas hydrate is combustible ice, which is distributed in deep sea sediments or permafrost on land. It is an ice-like crystalline substance formed by natural gas and water under high pressure and low temperature conditions. 1 cubic meter of combustible ice can be converted into 164 cubic meters meters of natural gas and 0.8 cubic meters of water, and the combustion of natural gas hydrate hardly produces any residue, and the pollution is much smaller than that of coal, oil, and natural gas, so the exploitation of natural gas hydrate is very important. The traditional methods of exploiting natural gas hydrate include: (1) Pyrolysis method: the pyrolysis method is to directly heat the natural gas hydrate layer, so that the temperatu...

AI Technical Summary

Problems solved by technology

The traditional methods of exploiting natural gas hydrate include: (1) Pyrolysis method: the pyrolysis method is to directly heat the natural gas hydrate layer, so that the temperature of the natural gas hydrate layer exceeds its equilibrium temperature, thereby promoting the decomposition of natural gas hydrate into water and Natural gas extraction method, but the heat utilization efficiency of this method is low, and the leaked methane can cause a greenhouse effect ten times more serious than carbon dioxide; (2) Depressurization method: The depressurization method promotes the decomposition of natural gas hydrate by reducing the pressure However, it is only economically feasible when the natural gas hydrate reservoir is located near the temperature-pressure equilibrium boundary; (3) chemical reagent injection production method: by injecting certain chemical reagents into the natural gas hydrate layer to destroy the natural gas hydrate The phase equilibrium condition of the reservoir promotes the decomposition of gas hydrate, but the chemical reagents required for it are expensive, the effect on the gas hydrate layer is slow, and it will also bring some environmental problems

Images