Method for igniting the top surface of oil shale in an in situ r

Method for in situ recovery of liquid and gaseous products from

Method for in situ shale oil recovery

Method for in situ shale oil recovery

Method for loading explosive laterally from a borehole

Method for maximizing shale oil recovery from an underground for

Method for preconditioning oil shale preliminary to explosive ex

Method for preparing an oil shale deposit for in situ retorting

Method for recovering high viscosity oils

Method for recovering subsurface earth substances

Method for rubblizing an oil shale deposit for in situ retorting

Method for thermoshaft oil production

Method of attenuating airblast from detonating explosive in an i

Method of blasting pillars with vertical blastholes

Method of bulking an in situ oil shale retort substantially full

Method of creating an underground batch retort complex

Method of detonating explosives for fragmenting oil shale format

Method of enhancing recovery of oil from pillars adjacent in sit

Method of forming a rubblized in-situ retort

Method of forming an in situ oil shale retort