Apparatus for in-situ retorting

Apparatus for obtaining uniform gas flow through an in situ oil

Blasthole spacing for control of particle size

Blasting to a horizontal free face with mixing of fragments

Coalbed methane extraction process

Combustion air supply to in-situ retorts

Consolidation of in-situ retort

Control of airblast during explosive expansion in an in situ oil

Controlled retorting methods for recovering shale oil from rubbl

Converting underground coal fires into commercial products

Cratering in the deep cratering region to form an in situ oil sh

Dispersion of catalysts with explosives for in situ mining of ca

Explosive expansion of formation in lifts for forming an in situ

Explosive expansion to a limited void with uniform scaled depth

Explosive placement for explosive expansion toward spaced apart

Fluid outlet at the bottom of an in situ oil shale retort

Formation of an in situ oil shale retort with control of moundin

Formation of in situ oil shale retort in plural steps

Formation of in situ oil shale retort with void at the top

Forming shale oil recovery retort by blasting into slot-shaped c