Wells – Processes – In situ combustion
Patent
1976-01-22
1976-12-28
Leppink, James A.
Wells
Processes
In situ combustion
48DIG6, 166260, 166261, 166263, 166266, E21B 4324, E21B 4326
Patent
active
039996077
ABSTRACT:
Coal liquids and gases are recovered from a thick underground coal seam by drilling one or more boreholes from the earth's surface into the lower part of the seam, burning out the coal over a limited area near the bottom of the seam, collapsing the overlying coal to form a rubblized zone extending vertically to a point near the upper boundary of the seam, driving a flame front vertically through the rubblized zone to liberate hydrocarbon liquids and produce gases, and recovering the liquids and gases from the rubblized zone.
REFERENCES:
patent: 947608 (1910-01-01), Betts
patent: 1913395 (1933-06-01), Karrick
patent: 2595979 (1952-05-01), Pevere et al.
patent: 3001775 (1961-09-01), Allred
patent: 3010707 (1961-11-01), Craighead et al.
patent: 3223158 (1965-12-01), Baker
patent: 3233668 (1966-02-01), Hamilton et al.
patent: 3465819 (1969-09-01), Dixon
patent: 3616855 (1971-11-01), Colgate et al.
patent: 3734184 (1973-05-01), Scott
patent: 3924680 (1975-12-01), Terry
Elder, The Underground Gasification of Coal, Chemistry of Coal Utilization, Supplementary Volume, Ed. by H. H. Lowry, N.Y. John Wiley & Sons, Inc. 1963, CH. 21, pp. 1023-1040.
Stephens, Prospects for In Situ Coal Liquefaction, UCRL-51770, Lawrence Livermore Laboratory, University of California at Livermore, May 7, 1975, pp. 1-17.
Arnold George T.
Gibson Michael A.
Pennington Robert E.
Exxon Research and Engineering Company
Leppink James A.
Reed James E.
Suchfield George A.
LandOfFree
Recovery of hydrocarbons from coal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Recovery of hydrocarbons from coal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of hydrocarbons from coal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-143843