Wells – Processes – Producing the well
Patent
1980-03-07
1981-12-15
Novosad, Stephen J.
Wells
Processes
Producing the well
166249, 166299, 166308, 299 17, E21B 4326, E21B 43263
Patent
active
043054641
ABSTRACT:
Methane is recovered from an underground coal seam via a borehole which extends from the earth's surface through the overburden to a cavity that is in, partly in or proximate to the coal seam. The cavity is constructed and arranged to be collapsible. Coal from the coal seam moves toward the coal seam under the influence of triaxial compression converting adsorbed methane to free form methane that is recovered.
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Elder, C. H., et al., "Degasification of the Marylee Coalbed near Oak Grove, Jefferson County, Ala., by Vertical Borehole in Advance of Mining", Report of Investigations #7968, U.S. Bureau of Mines, 1974, 21 pp.
Dew et al., "Coal Beds: A Source of Natural Gas", The Oil and Gas Journal, vol. 73, No. 4, Jun. 1975, pp. 47-49.
Dent et al., "Degasification of Coalbeds--a Commercial Source of Pipeline Gas", A.G.A. Monthly, vol. 56, No. 1, Jan. 1974, pp. 4-6.
Merritts, "Degasifying Before Mining", Coal Age, Aug. 1961, pp. 74-78.
Algas Resources Ltd.
Novosad Stephen J.
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