Wells – Processes – In situ combustion
Patent
1983-03-02
1985-03-05
Novosad, Stephen J.
Wells
Processes
In situ combustion
166263, 166292, C10J 500, E21C 4300
Patent
active
045025398
ABSTRACT:
A method for the underground gasification of coal or browncoal, using two boreholes extending through a coal layer with the slope of said layer, for supplying oxygen to a combustion and gasification front in said layer and discharging combustion gases respectively, a filler material being intermittently supplied through one of said boreholes for filling the cavity produced by burning away the coal layer. According to the invention, said filling is started at a moment before the combustion front has reached the discharge borehole, and in particular before the overlying formations will collapse to such a degree that an inadmissible subsidence at the ground level would develop. Thereafter the combustion and gasification is restarted in the same or the opposite sense as may be required for adjusting the orientation of the gasification front in the desired direction.
REFERENCES:
patent: 3001776 (1961-09-01), Van Poollen
patent: 3076505 (1963-02-01), Pryor
patent: 3952802 (1976-04-01), Terry
patent: 4036298 (1977-07-01), Kreinen et al.
patent: 4102397 (1978-07-01), Terry
patent: 4222437 (1980-09-01), Sabol
LandOfFree
Method for the underground gasification of coal or browncoal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for the underground gasification of coal or browncoal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the underground gasification of coal or browncoal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1729720