1 - 25 of 2
| Title | Date | Subject | Description | ||
|---|---|---|---|---|---|
| 1 |
 |
Arrangement for recovering viscous petroleum from thick tar sand | 1977-05-03 | Patent; Viscous oil; Tar sand; Petroleum; Recovering viscous petroleum; Large vertical dimension; Tubular member | An arrangement is provided for recovering viscous oil from a tar sand formation having a large vertical dimension including a substantially vertical lined shaft extending through the tar sand formation. A first opening is formed in the lower portion of the shaft lining and at least one lateral hole ... |
| 2 |
 |
Combination solvent-noncondensible gas injection method for recovering petroleum from viscous petroleum-containing formations including tar sand deposits | 1978-08-29 | Patent; Petroleum; Tar sand deposits; Petroleum recovery; Viscous petroleum-containing formations; Gas injection; Unreactive; Combination solvent-noncondensible gas injection method; Bitumen | Petroleum may be recovered from viscous petroleum-containing formations including tar sand deposits by injecting into the formation a solvent which is liquid at formation conditions and simultaneously therewith injecting a substance which will remain totally gaseous at the pressure and temperature c... |
1 - 25 of 2