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1
Drilling a horizontal coalbed methane drainage system from a directional surface borehole
“…United States. Bureau of Mines…”
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Government Document Online Book -
2
Measuring formation pressures and the degree of gas drainage in a large coalbed gas drainage field
“…United States. Bureau of Mines…”
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Government Document Online Book -
3
Use of a sodium silicate gel grout for plugging horizontal methane-drainage holes
“…United States. Bureau of Mines…”
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Government Document Online Book