Comparison of rotary and in-hole motor techniques for drilling horizontal boreholes in coal

Author:	Kravits, S. J.
Additional Authors:	Finfinger, Gerald L., Sainato, Albert.
Year:	1985
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:8933
Series:	Report of investigations / United States. Bureau of Mines ;
Report Number:	8933
Subjects:	Coalbed methane drainage--Pennsylvania
	Boring
	Mine ventilation
Link:	https://hdl.handle.net/2027/mdp.39015078477604