Coal gasification method

Details Coal gasification method Coal gasification method

1978-09-01

1981-01-06

Novosad, Stephen J.

Wells

Processes

In situ combustion

166 52, 166258, 166259, 48DIG6, E21B 4324, E21B 4326, E21C 4300

Patent

active

042431018

ABSTRACT:
A method for underground gasification of coal or brown coal, in which a substantially uniform gasification or combustion front is maintained by filling the cavity generated by gasification of coal with a filler so as to drive said front in an upward direction through the coal layer, the gases for maintaining the gasification being introduced through a first borehole and the combustion gases being discharged through a second borehole, one of these boreholes being used for introducing the filler, said boreholes extending at an inclination corresponding to the general inclination of the coal layer, and preferably converging towards one another.

REFERENCES:
patent: 2481051 (1949-09-01), Uren
patent: 3010512 (1961-11-01), Hurley et al.
patent: 3010707 (1961-11-01), Craighead et al.
patent: 3034580 (1962-05-01), Frey et al.
patent: 3331438 (1967-07-01), Slusser
patent: 3566967 (1971-03-01), Shelton et al.
patent: 3999607 (1976-12-01), Pennington et al.
patent: 4102397 (1978-07-01), Terry

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