Title:
Recovering sub-surface bituminous deposits by creating a frozen barrier and heating in situ
United States Patent 2777679
US Patent References:
/0829664.html
- - 0829664
Method and apparatus for shutting water out of oil-wells
- - 1342780
Method of increasing the yield of oil wells
- - 1457479
Method of mining oil and the like
- - 1661389
Method and means for developing impermeable barriers in porous media
- - 1870869
/0829664.html
- - 0829664
Method and apparatus for shutting water out of oil-wells
- - 1342780
Method of increasing the yield of oil wells
- - 1457479
Method of mining oil and the like
- - 1661389
Method and means for developing impermeable barriers in porous media
- - 1870869
Inventors:
Fredrik, Ljungstrom
Publication Date:
01/15/1957
View Patent Images:
Export Citation:
Assignee:
SVENSKA SKIFFEROLJE AKTIEBOLAG
Primary Class:
Other Classes:
175/12, 166/256, 166/259, 166/60, 166/245
International Classes:
E21B36/04; E21B43/24; E21B36/00; E21B43/16
Foreign References:
| GB191011890A | ||||
| GB190820778A | ||||
| GB155732A | ||||
| SE123136A |