Method for making holes and producing gas in coal seams

Patent · Tue Nov 24 04:00:00 EST 1981

OSTI ID:6958586

Munding, G; Hopmann, H; Sowa, A; Beckervordersandforth, C; Terschuren, W

In a process for coal gasification, a method and apparatus are described for making holes in coal seams in which hot working gas is employed to impinge on the coal under high pressure and speed in order to disintegrate it. Inclined or horizontal holes connect vertical drill holes which lead from the surface to the coal seam. The vertical drill holes which lead from the coal seam to the surface are used for blowing out gasification gases which are produced by the operation, as well as for delivering the hot working gas. A gasification medium of high temperature and pressure is produced directly at the locations where the disintegrated coal is gasified, the disintegrated coal being formed by a rocket combustion process. A hydrogenating gasification medium is used for gasifying the coal seam, for example, hydrogen steam mixture, so that the gas produced possesses the quality of natural gas. An oxidizing gasification medium such as air also may be supplied for gasifying the drilings. The gasification medium is not supplied from the surface but is produced at the location at which the gasification takes place, for example, by injecting water into the hot working gas. 8 claims.

• Assignee: Messer Bolkow Blohm GmbH
• Patent Number(s): US 4301875
• OSTI ID: 6958586
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
AIR
BOREHOLES
CAVITIES
COAL DEPOSITS
COAL GAS
COAL GASIFICATION
COAL SEAMS
DRILLING
ELEMENTS
FLUID INJECTION
FLUIDS
GAS INJECTION
GASES
GASIFICATION
GEOLOGIC DEPOSITS
HYDROGEN
IN-SITU GASIFICATION
IN-SITU PROCESSING
MINERAL RESOURCES
NONMETALS
PROCESSING
PRODUCTION
RESOURCES
STEAM
THERMOCHEMICAL PROCESSES
WORKING FLUIDS