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US 2016/0251950 A1Published application
Underground gasification ignition method
AssigneeEnn Coal Gasification Mining Co., Ltd.
InventorsFeng CHEN, Hongtao LIU
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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.
Claims10
A method of underground gasification ignition, comprising the following steps:
- (1) creating a directional drilling and vertical well(s) to construct an underground gasification furnace;
- (2) pre-penetrating the coal seam in the manner of cold fracturing;
- and
- (3) igniting in the vertical well at the end of the directional drilling.
1 more element
Dependencies are inferred from the claim text.