Multiple level methane drainage shaft method

Details Multiple level methane drainage shaft method Multiple level methane drainage shaft method

1982-09-20

1984-06-05

Purser, Ernest R.

Mining or in situ disintegration of hard material

Tunnel recovery of fluid material

166 50, 299 12, 299 19, E21C 4110, E21B 4330

Patent

active

044524897

ABSTRACT:
A method for collecting methane gas from subterranean formations having a plurality of spaced-apart coal seams containing methane gas includes the steps of drilling at least one shaft from the earth's surface to a depth sufficient to intersect a plurality of seams containing gas to be collected, excavating a working area at selected seams with each of the working areas communicating with the shaft, and drilling a plurality of boreholes from each of the working areas into the seams and collecting methane gas from the boreholes.

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H. H. Fields, et al., "Degasification and Production of Natural Gas from an Air Shaft in the Pittsburgh Coalbed"; U.S. Bureau of Mines; 1976.

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