1986•World Oil; (United States)Requires access
Lateral drilling: A new application shows promise
T.K. Li, V. Chandelle, J. Brych
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Abstract
A lateral drainhole has been successfully drilled from an existing vertical well, through a narrow horizontal coal seam to the vicinity of an adjacent well. The project followed unsuccessful thermal attempts to link the two wells for the purpose of in situ coal gasification. A detailed discussion of how the well was drilled, problems encountered and results achieved, is presented.