Underground gasification of coal

Details Underground gasification of coal Underground gasification of coal

1974-11-08

1976-01-20

Serwin, R. E.

Gas: heating and illuminating

Processes

Coal

48DIG6, 166259, 166256, 299 2, C10J 500, E21C 4300

Patent

active

039334473

ABSTRACT:
There is disclosed a method for the gasification of coal in situ which comprises drilling at least one well or borehole from the earth's surface so that the well or borehole enters the coalbed or seam horizontally and intersects the coalbed in a direction normal to its major natural fracture system, initiating burning of the coal with the introduction of a combustion-supporting gas such as air to convert the coal in situ to a heating gas of relatively high calorific value and recovering the gas. In a further embodiment the recovered gas may be used to drive one or more generators for the production of electricity.

REFERENCES:
patent: 1913395 (1933-06-01), Karrick
patent: 3024013 (1962-03-01), Rogers et al.
patent: 3497335 (1970-02-01), Taylor
patent: 3563606 (1971-02-01), Sears
patent: 3765722 (1973-10-01), Crumb
patent: 3775073 (1973-11-01), Rhoades

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