Fracturing of pillars for enhancing recovery of oil from in situ

Gas collection system for oil shale retort

Gas seal for an in situ oil shale retort and method of forming t

Gas withdrawal from an in situ oil shale retort

Ground water control for an in situ oil shale retort

Horizontal heated plane process

Hydraulic mining from tunnel by reciprocated pipes

Hydraulic mining of oil bearing formation

Hydrocarbon fuel recovery

In situ oil shale retort having horizontal voids with side pilla

In situ oil shale retort having horizontally offset pillars

In situ oil shale retort system

In situ oil shale retort with a generally T-shaped vertical cros

In situ oil shale retort with a horizontal sill pillar

In situ oil shale retort with controlled permeability for unifor

In situ oil shale retort with intermediate gas control

In situ oil shale retort with non-uniformly distributed void fra

In situ oil shale retorting process using introduction of gas at

In situ oil shale retorts with gas barriers for maximizing produ

In situ processing of mined oil shale