Process of underground coal gasification
Patent
·
OSTI ID:6650945
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.
- Assignee:
- Mobil Corp
- Patent Number(s):
- US 4356866
- OSTI ID:
- 6650945
- Country of Publication:
- United States
- Language:
- English
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