Method for gasification of deep, thin coal seams

Details Method for gasification of deep, thin coal seams Method for gasification of deep, thin coal seams

1980-08-29

1982-06-15

Novosad, Stephen J.

Wells

Processes

In situ combustion

166 50, 166245, E21B 43243, E21B 4330, E21C 4300

Patent

active

043345794

ABSTRACT:
A method of gasification of coal in deep, thin seams by using controlled bending subsidence to confine gas flow to a region close to the unconsumed coal face. The injection point is moved sequentially around the perimeter of a coal removal area from a production well to sweep out the area to cause the controlled bending subsidence. The injection holes are drilled vertically into the coal seam through the overburden or horizontally into the seam from an exposed coal face. The method is particularly applicable to deep, thin seams found in the eastern United States and at abandoned strip mines where thin seams were surface mined into a hillside or down a modest dip until the overburden became too thick for further mining.

REFERENCES:
patent: 2914309 (1959-11-01), Salomonsson
patent: 2994376 (1961-08-01), Crawford et al.
patent: 3152638 (1964-10-01), Geffen et al.
patent: 3563606 (1971-02-01), Sears
patent: 4026356 (1977-05-01), Shuck
patent: 4036298 (1977-07-01), Kreinin et al.
patent: 4222437 (1980-09-01), Sabol
Thring, "Underground Gasification of Coal", Mining Congress Journal, Sep. 1944, pp. 37, 38 and 52.
Hill, "Permeability Enhancement Methods for Preparing a Coal Bed for in Situ Coal Gasification", UCID-18096, Laurence Livermore National Laboratory (1979).
Gregg et al., "Basic Principles of Underground Coal Gasification", UCRL-52107, Lawrence Livermore National Laboratory (1976).

Affiliated with

Also associated with

Rating

Method for gasification of deep, thin coal seams 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 gasification of deep, thin coal seams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for gasification of deep, thin coal seams will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1915304