Method for stimulating methane production from coal seams
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United States of America Patent
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Oct 5, 1993
Grant Date -
N/A
app pub date -
Mar 13, 1992
filing date -
Mar 13, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a method for treating coal seams to improve dewatering to enhance gas production therefrom. The treatment is effected by contacting the coal with an effective amount of a selected additive comprises at least one member selected from the group consisting of benzyl coco di-(hydroxyethyl) quaternary amine, p-T-amyl-phenol condensed with formaldehyde and a copolymer comprising from about 80 to about 100% C.sub.1-30 alkyl methacrylate monomers and from about 0 to about 20% hydrophilic monomers.
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