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Class Information
Number: 166/60
Name: Wells > With heating, refrigerating or heat insulating means > Electrical heater in well
Description: Devices comprising electrical heating means situated below ground level.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4265307 |
Shale oil recovery |
May. 5, 1981 |
| 4199025 |
Method and apparatus for tertiary recovery of oil |
Apr. 22, 1980 |
| 4193448 |
Apparatus for recovery of petroleum from petroleum impregnated media |
Mar. 18, 1980 |
| 4185691 |
Secondary oil recovery method and system |
Jan. 29, 1980 |
| 4144935 |
Apparatus and method for in situ heat processing of hydrocarbonaceous formations |
Mar. 20, 1979 |
| 4140180 |
Method for in situ heat processing of hydrocarbonaceous formations |
Feb. 20, 1979 |
| 4140179 |
In situ radio frequency selective heating process |
Feb. 20, 1979 |
| 4127169 |
Secondary oil recovery method and system |
Nov. 28, 1978 |
| 4084637 |
Method of producing viscous materials from subterranean formations |
Apr. 18, 1978 |
| 4067390 |
Apparatus and method for the recovery of fuel products from subterranean deposits of carbonaceous matter using a plasma arc |
Jan. 10, 1978 |
| 4037655 |
Method for secondary recovery of oil |
Jul. 26, 1977 |
| 4024916 |
Borehole sealing method and apparatus |
May. 24, 1977 |
| 4010799 |
Method for reducing power loss associated with electrical heating of a subterranean formation |
Mar. 8, 1977 |
| 4008761 |
Method for induction heating of underground hydrocarbon deposits using a quasi-toroidal conductor envelope |
Feb. 22, 1977 |
| 3954140 |
Recovery of hydrocarbons by in situ thermal extraction |
May. 4, 1976 |
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