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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 |
| 5506391 |
Liquid heater using electrical oscillations |
Apr. 9, 1996 |
| 5484985 |
Radiofrequency ground heating system for soil remediation |
Jan. 16, 1996 |
| 5449889 |
Apparatus, system and method for dielectrically heating a medium using microwave energy |
Sep. 12, 1995 |
| 5433271 |
Heat injection process |
Jul. 18, 1995 |
| 5420402 |
Methods and apparatus to confine earth currents for recovery of subsurface volatiles and semi-volatiles |
May. 30, 1995 |
| 5404952 |
Heat injection process and apparatus |
Apr. 11, 1995 |
| 5400430 |
Method for injection well stimulation |
Mar. 21, 1995 |
| 5370477 |
In-situ decontamination with electromagnetic energy in a well array |
Dec. 6, 1994 |
| 5318116 |
Vacuum method for removing soil contaminants utilizing thermal conduction heating |
Jun. 7, 1994 |
| 5293936 |
Optimum antenna-like exciters for heating earth media to recover thermally responsive constituents |
Mar. 15, 1994 |
| 5282263 |
Method of stumulating oil wells by pumped solvent heated in situ to reduce wax obstructions |
Jan. 25, 1994 |
| 5247994 |
Method of stimulating oil wells |
Sep. 28, 1993 |
| 5236039 |
Balanced-line RF electrode system for use in RF ground heating to recover oil from oil shale |
Aug. 17, 1993 |
| 5211223 |
Down hole oil well heater employing electro-thermal paper |
May. 18, 1993 |
| 5182792 |
Process of electric pipeline heating utilizing heating elements inserted in pipelines |
Jan. 26, 1993 |
| 5168929 |
Method and apparatus for removal of oil well paraffin |
Dec. 8, 1992 |
| 5142608 |
Horizontal steam generator for oil wells |
Aug. 25, 1992 |
| 5126037 |
Geopreater heating method and apparatus |
Jun. 30, 1992 |
| 5099918 |
Power sources for downhole electrical heating |
Mar. 31, 1992 |
| 5082054 |
In-situ tuned microwave oil extraction process |
Jan. 21, 1992 |
| 5070533 |
Robust electrical heating systems for mineral wells |
Dec. 3, 1991 |
| 5065818 |
Subterranean heaters |
Nov. 19, 1991 |
| 5060726 |
Method and apparatus for producing tar sand deposits containing conductive layers having little or no vertical communication |
Oct. 29, 1991 |
| 5060287 |
Heater utilizing copper-nickel alloy core |
Oct. 22, 1991 |
| 5046559 |
Method and apparatus for producing hydrocarbon bearing deposits in formations having shale layers |
Sep. 10, 1991 |
| 5042579 |
Method and apparatus for producing tar sand deposits containing conductive layers |
Aug. 27, 1991 |
| 5012868 |
Corrosion inhibition method and apparatus for downhole electrical heating in mineral fluid wells |
May. 7, 1991 |
| 4988389 |
Exploitation method for reservoirs containing hydrogen sulphide |
Jan. 29, 1991 |
| 4984594 |
Vacuum method for removing soil contamination utilizing surface electrical heating |
Jan. 15, 1991 |
| 4973811 |
In situ decontamination of spills and landfills by radio frequency induction heating |
Nov. 27, 1990 |
| 4956535 |
Electrode systems for in situ vitrification |
Sep. 11, 1990 |
| 4951748 |
Technique for electrically heating formations |
Aug. 28, 1990 |
| 4926941 |
Method of producing tar sand deposits containing conductive layers |
May. 22, 1990 |
| 4919201 |
Corrosion inhibition apparatus for downhole electrical heating |
Apr. 24, 1990 |
| 4911239 |
Method and apparatus for removal of oil well paraffin |
Mar. 27, 1990 |
| 4861074 |
Tubing collar |
Aug. 29, 1989 |
| 4834174 |
Completion system for downhole steam generator |
May. 30, 1989 |
| 4821798 |
Heating system for rathole oil well |
Apr. 18, 1989 |
| 4819723 |
Reducing the permeability of a rock formation |
Apr. 11, 1989 |
| 4817711 |
System for recovery of petroleum from petroleum impregnated media |
Apr. 4, 1989 |
| 4805698 |
Packer cooling system for a downhole steam generator assembly |
Feb. 21, 1989 |
| 4793656 |
In-situ coal drying |
Dec. 27, 1988 |
| 4793409 |
Method and apparatus for forming an insulated oil well casing |
Dec. 27, 1988 |
| 4790375 |
Mineral well heating systems |
Dec. 13, 1988 |
| 4743725 |
Coaxial line microwave heating applicator with asymmetrical radiation pattern |
May. 10, 1988 |
| 4716960 |
Method and system for introducing electric current into a well |
Jan. 5, 1988 |
| 4704514 |
Heating rate variant elongated electrical resistance heater |
Nov. 3, 1987 |
| 4694907 |
Thermally-enhanced oil recovery method and apparatus |
Sep. 22, 1987 |
| 4678034 |
Well heater |
Jul. 7, 1987 |
| 4670634 |
In situ decontamination of spills and landfills by radio frequency heating |
Jun. 2, 1987 |
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