| http://www.w3.org/ns/prov#value | - A bottom hole burner for initiating combustion in subterranean formations which comprises a gas intake chamber closed at the upper end and having closure means at the lower end, the upper end of said chamber including means for raising and lowering said chamber in well tubing, the lower end of said chamber being tapered to fit a shoulder in the lower end of the well tubing, said tapered end includ
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