Process of underground coal gasification

Details Process of underground coal gasification Process of underground coal gasification

1980-12-31

1982-11-02

Novosad, Stephen J.

Wells

Processes

In situ combustion

166 50, C10J 500, E21B 43243

Patent

active

043568661

ABSTRACT:
Useful product is recovered from an underground coal seam by drilling a passage extending from the surface to a cavity formed in the floor rock below the coal seam, drilling one or more upwardly radially extending channels from the cavity forming an injection manifold-like system which extends to the interface between the floor rock and the coal seam, injecting an oxidant or oxidant gas mixture into these channels from the surface, igniting the coal where the radially extending channels connect with the base of the coal seam and recovering product gases generated by the gasification process through a plurality of surrounding production wells.

REFERENCES:
patent: 2481051 (1949-09-01), Uren
patent: 2561639 (1951-07-01), Squires
patent: 3497335 (1970-02-01), Taylor
patent: 3865186 (1975-02-01), Hippel et al.
patent: 3933447 (1976-01-01), Pasini et al.
patent: 3997005 (1976-12-01), Komar
patent: 4069867 (1978-01-01), Bissett
patent: 4095650 (1978-06-01), Shuck
patent: 4222437 (1980-09-01), Sabol

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