公开(公告)号：US20160251950A1

公开(公告)日：2016-09-01

申请号：US15032661

申请日：2014-03-27

Applicant: ENN COAL GASIFICATION MINING CO., LTD.

Inventor： Feng CHEN ,  Hongtao LIU

IPC: E21B43/295 ,  E21B7/04

CPC classification number: E21B43/295 ,  E21B7/04 ,  E21B43/243 ,  E21B43/26 ,  E21C43/00

Abstract: An underground gasification ignition method comprises the following steps: making a directional drilling and a vertical well to construct an underground gasification furnace; using a cold fracturing method to pre-penetrate a coal seam; and igniting in the vertical well at an end of the directional drilling.

Abstract translation: 地下气化点火方法包括以下步骤：定向钻井和垂直井，构建地下气化炉; 采用冷压裂法预先穿透煤层; 并在定向钻井结束时在垂直井中点燃。