| 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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| 03/15/2000 | CN1247526A Method for recovering gas from hydrates |
| 03/09/2000 | WO2000012863A1 Method for sealing rocks or building material and corresponding device |
| 03/09/2000 | DE19840777A1 Cleaning contaminated ground comprises inserting a heating lance directly next to the vacuum level and bringing the ground air and ground to a higher temperature level by heat from the lance |
| 03/07/2000 | US6032732 Well head heating system |
| 03/02/2000 | WO2000011317A1 Method of using a heater with a fiber optic string in a wellbore |
| 03/02/2000 | CA2342139A1 Method of using a heater with a fiber optic string in a wellbore |
| 02/16/2000 | CN2364206Y High-efficiency energy-saving heating stove for coal-burning oil production field |
| 02/09/2000 | CN2363051Y Combined electric heater for hole top of oil well and gasser |
| 02/08/2000 | US6023554 Electrical heater |
| 02/02/2000 | CN1049037C Low resistance electrical heater |
| 02/01/2000 | US6019172 Flameless combustor |
| 02/01/2000 | CA2152520C Electrical heating of mineral well deposits using downhole impedance transformation networks |
| 02/01/2000 | CA2032131C In situ soil decontamination method and apparatus |
| 01/26/2000 | CN2360598Y Petroleum electrcal heating appts. |
| 01/26/2000 | CN2360597Y Oil well thermal insulating anti-corrosion appts |
| 01/25/2000 | US6016868 Production of synthetic crude oil from heavy hydrocarbons recovered by in situ hydrovisbreaking |
| 01/25/2000 | US6016867 Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking |
| 01/18/2000 | US6015015 Insulated and/or concentric coiled tubing |
| 01/12/2000 | CN1048311C Oil-well self hot-washing wax-removing method and apparatus |
| 01/05/2000 | EP0839255A4 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing |
| 01/05/2000 | CN2357127Y Electric heater for high-pressure natural gas well head |
| 01/05/2000 | CN2357126Y Electric heater for crude oil well station |
| 01/05/2000 | CN2357125Y Deep-well petroleum electric heater |
| 01/04/2000 | US6009940 Production in frigid environments |
| 01/04/2000 | US6009907 Flexible stiffener |
| 12/29/1999 | WO1999067505A1 Recovery of heavy hydrocarbons by in-situ hydrovisbreaking |
| 12/29/1999 | WO1999067504A1 Production of heavy hydrocarbons by in-situ hydrovisbreaking |
| 12/28/1999 | US6006837 Method and apparatus for heating viscous fluids in a well |
| 12/11/1999 | CA2274629A1 Process for thermally isolating production tubings placed in a well using a non-rigid foam |
| 12/01/1999 | CN1236858A Electrical heater |
| 12/01/1999 | CN1046976C Assembly for reinforcing well, special for drilling oil well |
| 11/30/1999 | US5994670 Electrical heating of soils using high efficiency electrode patterns and power phases |
| 11/24/1999 | CN2350713Y Electric heating heat pipe radiator |
| 11/23/1999 | US5988280 Use of engine heat in treating a well bore |
| 11/10/1999 | CN2348090Y Hot-pipe compound electric heating sucker rod |
| 11/09/1999 | US5979549 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well |
| 10/26/1999 | US5974226 Heated power cable |
| 10/21/1999 | CA2254244A1 Apparatus for enhanced recovery of viscous oil deposits |
| 10/20/1999 | CN2344539Y Electrothermal electromagnetic eddy oil production equipment |
| 10/05/1999 | US5960876 Wellhead equipment that use polymer sealing elements to seal off well pressure |
| 09/29/1999 | CN2340893Y Underground electromagnetic heater and hole top and borehole therefor |
| 09/21/1999 | US5954452 Heated hydrogen peroxide reagent under pressure |
| 09/08/1999 | EP0940558A1 Electrical heater |
| 09/01/1999 | CN2336090Y Local electrothermal film heater for pipeline |
| 08/31/1999 | CA2140736C A thixotropic fluid for well insulation |
| 08/25/1999 | EP0870101B1 Flameless combustor |
| 08/04/1999 | EP0933124A1 Method for preparing an injectable and in situ gelable mixture in a confined space |
| 08/04/1999 | CN2331759Y Oil well electromagnet heating device |
| 08/03/1999 | US5931000 Cooled electrical system for use downhole |
| 07/29/1999 | CA2259001A1 Preparation process for an injectable, gelifiable mixture in situ in a confined space |
| 07/28/1999 | CN2330780Y Full-course electroheating device for oil well pumping tube |
| 06/24/1999 | WO1999019596A3 Directional drilling tool |
| 06/17/1999 | CA2256102A1 Downhole tool actuator |
| 06/03/1999 | WO1999027228A1 Tool cooling system |
| 05/25/1999 | US5907662 Electrode wells for powerline-frequency electrical heating of soils |
| 05/12/1999 | CN2318394Y Heat-conducting oil circulation heating thickened oil heating production device |
| 05/11/1999 | US5901788 Well fluid sampling tool and well fluid sampling method |
| 05/06/1999 | WO1999022115A1 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well |
| 05/06/1999 | CA2307771A1 Method and apparatus for viscosity reduction of clogging hydrocarbons in oil well |
| 05/04/1999 | US5899369 Bracelet closure aid |
| 05/04/1999 | US5899269 Flameless combustor |
| 04/28/1999 | CN1215126A Downhole radio-frequency electromagnetic oil-production system |
| 04/22/1999 | WO1999019596A2 Directional drilling tool |
| 04/22/1999 | CA2306944A1 Directional drilling tool |
| 04/14/1999 | CN1213737A Cycling heating tech. of oil well casing dual-pipe parallel heat transport fluid |
| 04/14/1999 | CA2249896A1 Method of thermally insulating a wellbore |
| 04/01/1999 | WO1998023842A8 Methods and apparatus for enhanced recovery of viscous deposits by thermal stimulation |
| 03/03/1999 | CN2309418Y Electric heating device for oil well |
| 01/27/1999 | CN2305484Y Six core eddy heating cable in hollow pumping rod for well pumping unit of oil well |
| 01/27/1999 | CN1206447A Flameless combustor |
| 01/27/1999 | CN1206446A Flameless combustor |
| 01/26/1999 | US5862866 Double walled insulated tubing and method of installing same |
| 01/26/1999 | US5862858 Flameless combustor |
| 01/14/1999 | WO1999001640A1 Method for exploiting gas and oil fields and for increasing gas and crude oil output |
| 01/13/1999 | EP0755497B1 Facility for effecting energy exchange between the ground and an energy exchanger |
| 01/07/1999 | EP0888489A1 Hydrocarbon recovery method using inverted production wells |
| 01/07/1999 | DE19727493A1 Geothermal probe in borehole, for heat pump system |
| 12/30/1998 | CN2302335Y Multi-function gas-steam generator |
| 12/30/1998 | CN2302331Y Heating apparatus for underwell raw petroleum |
| 12/29/1998 | CA2090629C Electrical heating systems for low-cost retrofitting of oil wells |
| 12/23/1998 | EP0770168B1 Downhole electrical heating system |
| 12/23/1998 | CN2301532Y Auto-control oil production aid |
| 12/16/1998 | EP0883732A2 Downhole flow stimulation in a natural gas well |
| 12/16/1998 | CN2300722Y Three-phase induction heater used under oil well |
| 12/09/1998 | CN2299938Y Heating device for oil well |
| 12/09/1998 | CN2299937Y Vertical hot-tube water jacket heating furnace |
| 12/08/1998 | US5845854 Method of solid insulator destruction |
| 12/03/1998 | WO1998054440A1 Method and device for cleaning out a well or piping blocked with gas hydrates |
| 12/02/1998 | CN2299150Y Non-source magnetic and electrical conversion device for petroleum extraction and transport |
| 12/02/1998 | CN2299149Y Electrical heating appts. for extracting petroleum from deep well |
| 11/12/1998 | WO1998050179A1 Remediation method |
| 11/10/1998 | US5833001 Sealing well casings |
| 11/10/1998 | US5832999 Pyrophoric liquid is transported from slug launching chamber into fuel gas stream, flushing chamber with hydrocarbon liquid to remove any pyrophoric liquid |
| 11/10/1998 | CA2055053C Robust electrical heating systems for mineral wells |
| 11/05/1998 | WO1998040603A3 Apparatus and methods for generating energy utilizing downhole processed fuel |
| 11/03/1998 | US5829528 Ignition suppression system for down hole antennas |
| 11/03/1998 | US5829519 Subterranean antenna cooling system |
| 10/28/1998 | CN2295849Y Electric heater for underwell sucker rod |
| 10/14/1998 | EP0870101A1 Flameless combustor |
| 10/14/1998 | EP0870100A1 Flameless combustor |