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Directional Drilling for Coalbed Degasification in Advance of Mining.

Authors
Diamond-WP; Oyler-DC
Source
Proc 2nd Ann Symp on Methane Recovery from Coalbeds Pittsburgh, Pennsylvania, 1979 Apr; :162-176
Link
NIOSHTIC No.
10000698
Abstract
The Bureau of Mines has conducted research in directional drilling for degasification in advance of mining since 1973. This technique is designed to combine the highly successful underground horizontal degasification drilling technology with surface drilling methods. The use of directional drilling techniques will be particularly useful in areas where access to gassy coalbeds is not possible underground, and where topography makes multiple sites for vertical degasification holes impractical or prohibitively expensive. This report presents the development of the directional drilling technique in detail along with a description of the Bureau's current directional drilling program at the Emerald Mine near Waynesburg, Pennsylvania.
Publication Date
19790401
Document Type
OP;
Fiscal Year
1979
NTIS Accession No.
NTIS Price
Identifying No.
OP 16-80
NIOSH Division
PRC;
Source Name
Proc. 2nd Ann. Symp. on Methane Recovery from Coalbeds, Pgh., Pennsylvania, Apr. 18-20, 1979, PP. 162-176
State
PA;
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