| Patents for E21B 36 - Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones (4,262) |
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| 12/14/1988 | EP0294809A2 Heating system for rathole oil well |
| 12/13/1988 | US4790375 Power sources connected to casing and tubing to provide coaxial electrical heater |
| 12/13/1988 | CA1246723A1 Method and apparatus for monitoring ice masses |
| 11/22/1988 | US4785853 Conduct pipe covered with electrically insulating material |
| 11/22/1988 | US4785852 Conduct pipe covered with electrically insulating material |
| 11/08/1988 | US4783585 Downhole electric steam or hot water generator for oil wells |
| 10/18/1988 | US4778970 Viscosity reduction apparatus using microwave energy |
| 08/31/1988 | CN87100890A Conductively heating subterranean oil shale to create permeability and subsequently produce oil |
| 08/30/1988 | US4766955 Wellbore fluid sampling apparatus |
| 08/30/1988 | CA1241272A1 Dual aquafer electrical heating of subsurface hydrocarbons |
| 08/24/1988 | CN87216970U Infrared heater for oil pump well opening |
| 08/24/1988 | CN87209197U Infrared heating insulation device for petroleum |
| 08/23/1988 | US4765410 Method and apparatus for cleaning wells |
| 08/23/1988 | US4765406 Method of and apparatus for increasing the mobility of crude oil in an oil deposit |
| 07/12/1988 | CA1239089A1 Corrosion resistant metal pipe and process for producing same |
| 06/22/1988 | EP0271569A1 Downhole electric heating generator for producing steam or hot water |
| 06/07/1988 | US4749053 Drill bit having a thrust bearing heat sink |
| 05/03/1988 | US4741386 Fluid treatment apparatus |
| 02/23/1988 | US4726759 Injection of high-pressure flue gas-steam mixture; combustion |
| 02/16/1988 | CA1232935A1 Well-site insulated heating apparatus |
| 01/20/1988 | EP0235268A4 Method and apparatus for reducing viscosity of high viscosity materials. |
| 01/20/1988 | EP0061494B1 Thermal enhancement |
| 01/19/1988 | US4720263 Transportable system for providing heat to flowing materials |
| 01/14/1988 | WO1988000276A1 Downhole electric heating generator for producing steam or hot water |
| 01/05/1988 | US4716960 Method and system for introducing electric current into a well |
| 12/08/1987 | US4711309 Drilling apparatus |
| 12/08/1987 | CA1230173A1 Electronics packaging system |
| 11/17/1987 | US4706751 Heavy oil recovery process |
| 11/10/1987 | US4705113 Method of cold water enhanced hydraulic fracturing |
| 11/03/1987 | US4704514 Heating rate variant elongated electrical resistance heater |
| 10/28/1987 | CN87102797A Method and apparatus for extracting petroleum |
| 10/27/1987 | CA1228534A1 Drainhole and downhole hot fluid generation oil recovery method |
| 10/20/1987 | US4700781 Heavy crude oil production tool and method |
| 10/13/1987 | US4699719 Process and apparatus for utilizing engine exhaust heat in oil field operations |
| 10/06/1987 | CA1227744A1 Steam drive oil recovery method utilizing a downhole steam generator and anti clay-swelling agent |
| 09/22/1987 | US4694907 Thermally-enhanced oil recovery method and apparatus |
| 09/15/1987 | US4693313 Insulated wellbore casing |
| 09/09/1987 | EP0235268A1 Method and apparatus for reducing viscosity of high viscosity materials. |
| 08/18/1987 | US4687491 Fuel admixture for a catalytic combustor |
| 08/18/1987 | US4687420 Sonic pressure wave pump with liquid heating and elevating mechanism |
| 08/11/1987 | US4685867 Submersible motor-pump |
| 08/04/1987 | CA1225019A1 Downhole tool |
| 07/28/1987 | US4682471 Turbocompressor downhole steam-generating system |
| 07/14/1987 | CA1224164A1 Electrode supporting conduit tube for electrical heating of underground hydrocarbon resources |
| 07/07/1987 | US4678039 Method and apparatus for secondary and tertiary recovery of hydrocarbons |
| 07/07/1987 | US4678034 Well heater |
| 07/07/1987 | CA1223806A1 Method and apparatus for the recovery of hydrocarbons |
| 06/24/1987 | CN85109703A Method and device for heating underground region of long distance up to high temp. |
| 06/24/1987 | CN85109008A Metal armoured resistance heater |
| 06/24/1987 | CN85109007A Cable installation for heater |
| 06/24/1987 | CN85109006A Slender resistance-heater with variable rate of heating |
| 06/23/1987 | US4674959 Pressure-operated valve, particularly for a downhole pump |
| 06/17/1987 | CN85109010A Technology for installing bunched cables having strands with different diameter into a well |
| 06/16/1987 | US4673652 Method of testing and reconditioning insulating tubular conduits |
| 06/02/1987 | US4669538 Double-grip thermal expansion screen hanger and running tool |
| 05/26/1987 | US4667739 Thermal drainage process for recovering hot water-swollen oil from a thick tar sand |
| 05/19/1987 | US4665978 High temperature packer for well conduits |
| 05/12/1987 | US4665305 Corrosion resistant metal pipe with electrode for oil wells |
| 05/05/1987 | US4662438 Method and apparatus for enhancing liquid hydrocarbon production from a single borehole in a slowly producing formation by non-uniform heating through optimized electrode arrays surrounding the borehole |
| 05/05/1987 | US4662437 Electrically stimulated well production system with flexible tubing conductor |
| 04/28/1987 | US4660643 Cold fluid hydraulic fracturing process for mineral bearing formations |
| 04/28/1987 | US4660636 Protective device for RF applicator in in-situ oil shale retorting |
| 04/21/1987 | US4658601 Cryogenic cell |
| 04/14/1987 | CA1220413A1 Method for initiating an oxygen driven in-situ combustion process |
| 04/07/1987 | US4655292 Steam injection packer actuator and method |
| 04/07/1987 | US4655285 Plug for use in hot oil treatment of wells having paraffin deposits and method of use thereof |
| 04/07/1987 | CA1220131A1 Direct contact low emission steam generating system utilizing a compact, multi-fuel burner |
| 03/18/1987 | CN86103769A In-situ steam drive oil recovery process |
| 03/12/1987 | WO1987001551A1 Method and apparatus for reducing viscosity of high viscosity materials |
| 03/10/1987 | US4648835 Steam generator having a high pressure combustor with controlled thermal and mechanical stresses and utilizing pyrophoric ignition |
| 03/03/1987 | US4646828 Apparatus for enhanced oil recovery |
| 02/24/1987 | CA1218268A1 Method and apparatus of thermal detection using bonded coupon |
| 02/10/1987 | US4641710 Enhanced recovery of subterranean deposits by thermal stimulation |
| 02/04/1987 | EP0210735A2 Improvements in or relating to drilling apparatus |
| 02/03/1987 | US4640355 Limited entry method for multiple zone, compressible fluid injection |
| 02/03/1987 | US4640353 Electrode well and method of completion |
| 02/03/1987 | US4640352 In-situ steam drive oil recovery process |
| 01/27/1987 | US4638863 Well production method using microwave heating |
| 01/27/1987 | US4638862 Means and method for producing hydrocarbons from an earth formation during the RF retorting of a hydrocarbon stratum |
| 01/27/1987 | CA1217129A1 Wellhead expansion assembly |
| 01/20/1987 | US4637458 Blowout preventer for use in combination with a deep well pump |
| 01/13/1987 | US4635967 Internal seal for insulated steam injection casing assembly |
| 12/16/1986 | US4629888 Well logging tool for hot well bores |
| 12/02/1986 | CA1214768A1 Hydraulic piston-effect method and apparatus for forming a bore hole |
| 11/25/1986 | US4624485 Insulating tubular conduit apparatus |
| 11/11/1986 | US4621838 Insert for insulated steam injection tubing |
| 11/05/1986 | EP0200195A2 Thermal enhancement |
| 11/04/1986 | US4620593 Oil recovery system and method |
| 10/21/1986 | CA1212898A1 Process and installation for in-situ gasification of coal |
| 10/14/1986 | US4616705 Mini-well temperature profiling process |
| 09/23/1986 | US4612988 Dual aquafer electrical heating of subsurface hydrocarbons |
| 09/09/1986 | US4610793 Oil extraction method |
| 09/09/1986 | CA1211077A1 Method of mechanically prestressing a tubular apparatus |
| 09/02/1986 | US4609041 Well hot oil system |
| 08/27/1986 | EP0191962A1 Cryogenic cell |
| 08/12/1986 | CA1209629A1 Conduction heating of hydrocarbonaceous formations |
| 07/29/1986 | CA1208540A1 Apparatus and method for in situ controlled heat processing of hydrocarbonaceous formations with a controlled parameter line |
| 07/15/1986 | CA1207828A1 Single well stimulation for the recovery of liquid hydrocarbons from subsurface formations |
| 07/02/1986 | CA1206824A Pressure control for steam generator |
| 07/01/1986 | US4597444 Method for excavating a large diameter shaft into the earth and at least partially through an oil-bearing formation |