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Class Information
Number: 166/272.1
Name: Wells > Processes > Distinct, separate injection and producing wells > Involving the step of heating
Description: A process in distinct, separate wells incorporating the step of raising the temperature of the fluid.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4022275 |
Methods of use of sonic wave generators and modulators within subsurface fluid containing strata or formations |
May. 10, 1977 |
| 4007791 |
Method for recovery of crude oil from oil wells |
Feb. 15, 1977 |
| 4007785 |
Heated multiple solvent method for recovering viscous petroleum |
Feb. 15, 1977 |
| 3973628 |
In situ solution mining of coal |
Aug. 10, 1976 |
| 3967853 |
Producing shale oil from a cavity-surrounded central well |
Jul. 6, 1976 |
| 3958636 |
Production of bitumen from a tar sand formation |
May. 25, 1976 |
| 3954139 |
Secondary recovery by miscible vertical drive |
May. 4, 1976 |
| 3946809 |
Oil recovery by combination steam stimulation and electrical heating |
Mar. 30, 1976 |
| 3945679 |
Subterranean oil shale pyrolysis with permeating and consolidating steps |
Mar. 23, 1976 |
| 3931856 |
Method of heating a subterranean formation |
Jan. 13, 1976 |
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