METHOD FOR PRODUCTION OF METHANE FROM NEAR-BOTTOM HYDRATE DEPOSITS Russian patent published in 2013 - IPC E21B43/01 

FIELD: oil and gas industry.

SUBSTANCE: from water surface up to near-bottom methane hydrate deposit tube with diameter from 0.01 m up to 1 m is taken down with methane collector at upper butt end. In near-bottom deposit at lower butt ends of this tube pulp is made containing suspension of solid particles of methane hydrate in ambient water with size from 10^-6 m up to 0.01 m and weight content of methane from 0.01% up to 10%. At the beginning forces flow of pulp is created at lower butt end of the tube in order to initiate a self-maintained process. In methane collector liquid water and gaseous methane are divided. Then water is drained and methane is collected.

EFFECT: improving effectiveness of the method due to decrease of power supply from outside.

7 cl