Method for forming an in situ oil shale retort

Details Method for forming an in situ oil shale retort Method for forming an in situ oil shale retort

1980-03-24

1982-04-27

Purser, Ernest R.

Mining or in situ disintegration of hard material

Processes

Explosive

299 2, 102312, E21C 4110

Patent

active

043267521

ABSTRACT:
An in situ oil shale retort is formed in a subterranean formation by excavating voids adjacent the top and bottom boundaries of the retort, leaving an intermediate zone of unfragmented formation between the voids. The lower level void is substantially larger than the upper level void. A lower portion of the intermediate zone is explosively expanded downwardly towards the lower level void for forming a first moiety of a fragmented mass of formation particles in the retort and leaving a void spaace over the top of the first moiety having about the same volume as the upper level void. Thereafter an upper portion of the intermediate zone is explosively expanded upwardly towards the upper level void and downwardly towards the void space for forming a second moiety of the fragmented mass in the retort. The fragmented mass has an average void fraction up to about 25% and no substantial part has a void fraction less than about 20%.

REFERENCES:
patent: 3980339 (1976-09-01), Heald
patent: 4043597 (1977-08-01), French
patent: 4146272 (1979-03-01), French

Affiliated with

Also associated with

Rating

Method for forming an in situ oil shale retort does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for forming an in situ oil shale retort, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for forming an in situ oil shale retort will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2195131