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Degasification of virgin Pittsburgh coalbed through a large borehole
Directionally controlled drilling to horizontally intercept selected strata, upper Freeport coalbed, Green County, Pa.
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Published Year
1970-1979 (2)
Subject
Mine gases (2)
Mine ventilation (2) *
Boring (1)
Coal mines and mining (1)
Coalbed methane drainage--West Virginia (1)
Author
Fields, H. H. (2) *
Diamond, W. P. (1)
Oyler, David C., (1)