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Seabed combustible ice mining method

A mining method, seawater technology, used in the production of fluids, earth-moving drilling, wellbore/well components, etc.

Active Publication Date: 2015-11-04
迈瑞尔实验设备(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no mature large-scale commercial mining method in various countries at present

Method used

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  • Seabed combustible ice mining method

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Experimental program
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Effect test

Embodiment 1

[0033] The resistance overcome by the axial flow pump 6 of the present invention is mainly pipeline friction and the static pressure difference above the sea surface, so the separation container 7 on the mining platform 9 floating on the sea surface 10 should be as low as possible. When the separation container 7 is 5 meters away from the sea surface 10 and the seabed excavation surface is 500 meters away from the sea surface, the five axial flow pumps 6 with rotating speeds between 400 and 600 rpm can realize the flow velocity requirement in the cylinder pipe 4 . The inner diameter of the barrel pipe 4 matches the capacity of the mechanical excavator 2, and the combustible ice content in the initial fluid is between 10% and 60%. The temperature of the liquid phase in the separation container 7 is maintained at 25-40° C., and the residence time of the liquid phase in the separation container 7 is greater than 10 minutes, so that the residual combustion ice can be completely dec...

Embodiment 2

[0035] When the separation container 7 is 5 meters away from the sea surface 10 and the seabed excavation surface is 1000 meters away from the sea surface, nine axial flow pumps 6 with rotation speeds between 400 and 600 rpm can realize the flow velocity requirements in the cylinder pipe 4 . The inner diameter of the barrel pipe 4 matches the capacity of the mechanical excavator 2, and the combustible ice content in the initial fluid is between 15% and 60%. Maintain the temperature of the liquid phase in the separation container 7 at 25-40° C., and the residence time of the liquid phase in the tank is greater than 10 minutes, so that the residual combustion ice can be completely decomposed.

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Abstract

The invention relates to a seabed combustible ice mining method. According to the method, the nature of combustible ice, characteristics of sea and the conception of the fluid mechanics principle are utilized, and mining is conducted through mechanical drivaging, liquid flow lifting separation and collection by a sea surface mining platform. The seabed combustible ice mining method can be used for the shallow-ocean work or the deep-ocean work, is greatly different from an existing decompression or heating or chemical method and has the advantages of being low in energy consumption, high in efficiency, free of leakage and the like.

Description

technical field [0001] The invention relates to a method for mining combustible ice on the seabed. The combustible ice is excavated by a mechanical tunneling machine, and several axial flow pumps are installed to drive the seawater flow in the cylinder pipe, and the combustible ice is carried up, and the temperature rises while the pressure increases. As it descends, the combustible ice decomposes. Finally, the gas-liquid mixture flows to the separation container on the sea surface operation platform. The collected gas is simply processed and transported to the destination. It can be applied to the mining of combustible ice in shallow seas and deep seas. Background technique [0002] It is generally believed that the exploration and development of combustible ice is a systematic project involving many disciplines, such as marine geology, geophysics, geochemistry, fluid dynamics, thermodynamics, drilling engineering, etc., and requires the cooperation of experts in various fie...

Claims

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Application Information

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IPC IPC(8): E21B43/00E21B43/34
Inventor 朱博源
Owner 迈瑞尔实验设备(上海)有限公司
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