Directionally controlled drilling to horizontally intercept selected strata, upper Freeport coalbed, Green County, Pa.
By: by William P. Diamond, David C. Oyler, and Herbert H. Fields
Contributors: Oyler, David C., jt. auth; Fields, Herbert H., jt. auth; United States. Bureau of Mines
Series: Report of investigations - Bureau of Mines ; 8231
Publisher: Dept. of the Interior, Bureau of Mines
Published: 1977
Place of publication: [Washington]
Language: eng
Number of pages: 21
Subjects: Boring; Mine gases; Mine ventilation; Coal mines and mining
Notes: Bibliography: p. 21