
US Patent No: 6,789,625
Number of patents in Portfolio can not be more than 2000
In situ thermal processing of a hydrocarbon containing formation using exposed metal heat sources
Stats
-
Sep 14, 2004
Issued date -
Apr 24, 2001
filing date -
09/841,307
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
A hydrocarbon containing formation may be treated using an in situ thermal process. Hydrocarbons, H.sub.2, and/or other formation fluids may be produced from the formation. Heat may be applied to the formation from heat sources to raise a temperature of a portion of the formation to a desired temperature. Some of the heat sources may include heater elements. The heater elements may be lengths of bare metal disposed within wellbores within the formation.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 4,359,687 Method and apparatus for determining shaliness and oil saturations in earth formations using induced polarization in the frequency domain | 256 | 1980 | |
| 4,398,151 Method for correcting an electrical log for the presence of shale in a formation | 244 | 1982 | |
| 4,583,046 Apparatus for focused electrode induced polarization logging | 247 | 1983 | |
| 4,540,882 Method of determining drilling fluid invasion | 253 | 1983 | |
| 4,542,648 Method of correlating a core sample with its original position in a borehole | 254 | 1983 | |
| 4,571,491 Method of imaging the atomic number of a sample | 263 | 1983 | |
| 4,583,242 Apparatus for positioning a sample in a computerized axial tomographic scanner | 250 | 1983 | |
| 4,613,754 Tomographic calibration apparatus | 259 | 1983 | |
| 4,635,197 High resolution tomographic imaging method | 244 | 1983 | |
| 4,644,283 In-situ method for determining pore size distribution, capillary pressure and permeability | 256 | 1984 | |
| 4,570,715 Formation-tailored method and apparatus for uniformly heating long subterranean intervals at high temperature | 275 | 1984 | |
| 4,663,711 Method of analyzing fluid saturation using computerized axial tomography | 245 | 1984 | |
| 4,572,299 Heater cable installation | 266 | 1984 | |
| 4,585,066 Well treating process for installing a cable bundle containing strands of changing diameter | 239 | 1984 | |
| 4,704,514 Heating rate variant elongated electrical resistance heater | 279 | 1985 | |
| 4,671,102 Method and apparatus for determining distribution of fluids | 264 | 1985 | |
| 4,626,665 Metal oversheathed electrical resistance heater | 263 | 1985 | |
| 4,719,423 NMR imaging of materials for transport properties | 271 | 1985 | |
| 4,728,892 NMR imaging of materials | 295 | 1985 | |
| 4,640,352 In-situ steam drive oil recovery process | 277 | 1985 | |
| 4,594,468 Process for the preparation of middle distillates from syngas | 148 | 1985 | |
| 4,730,162 Time-domain induced polarization logging method and apparatus with gated amplification level | 242 | 1985 | |
| 4,658,215 Method for induced polarization logging | 248 | 1986 | |
| 4,616,705 Mini-well temperature profiling process | 262 | 1986 | |
| 4,769,602 Determining multiphase saturations by NMR imaging of multiple nuclides | 266 | 1986 | |
| 4,769,606 Induced polarization method and apparatus for distinguishing dispersed and laminated clay in earth formations | 249 | 1986 | |
| 4,743,854 In-situ induced polarization method for determining formation permeability | 244 | 1986 | |
| 4,827,761 Sample holder | 257 | 1987 | |
| 4,856,341 Apparatus for analysis of failure of material | 251 | 1987 | |
| 5,306,640 Method for determining preselected properties of a crude oil | 249 | 1987 | |
| 4,886,118 Conductively heating a subterranean oil shale to create permeability and subsequently produce oil | 296 | 1988 | |
| 4,866,983 Analytical methods and apparatus for measuring the oil content of sponge core | 247 | 1988 | |
| 4,884,455 Method for analysis of failure of material employing imaging | 248 | 1989 | |
| 4,987,368 Nuclear magnetism logging tool using high-temperature superconducting squid detectors | 269 | 1989 | |
| 5,046,559 Method and apparatus for producing hydrocarbon bearing deposits in formations having shale layers | 269 | 1990 | |
| 5,060,726 Method and apparatus for producing tar sand deposits containing conductive layers having little or no vertical communication | 259 | 1990 | |
| 5,060,287 Heater utilizing copper-nickel alloy core | 281 | 1990 | |
| 5,065,818 Subterranean heaters | 273 | 1991 | |
| 5,189,283 Current to power crossover heater control | 248 | 1991 | |
| 5,168,927 Method utilizing spot tracer injection and production induced transport for measurement of residual oil saturation | 247 | 1991 | |
| 5,226,961 High temperature wellbore cement slurry | 257 | 1992 | |
| 5,255,742 Heat injection process | 298 | 1992 | |
| 5,297,626 Oil recovery process | 278 | 1992 | |
| 5,236,039 Balanced-line RF electrode system for use in RF ground heating to recover oil from oil shale | 284 | 1992 | |
| 5,366,012 Method of completing an uncased section of a borehole | 514 | 1993 | |
| 5,391,291 Hydrogenation catalyst and process | 251 | 1993 | |
| 5,392,854 Oil recovery process | 282 | 1993 | |
| 5,404,952 Heat injection process and apparatus | 269 | 1993 | |
| 5,411,089 Heat injection process | 254 | 1993 | |
| 5,433,271 Heat injection process | 259 | 1993 | |
| 5,409,071 Method to cement a wellbore | 254 | 1994 | |
| 5,497,087 NMR logging of natural gas reservoirs | 284 | 1994 | |
| 5,498,960 NMR logging of natural gas in reservoirs | 298 | 1994 | |
| 5,541,517 Method for drilling a borehole from one cased borehole to another cased borehole | 252 | 1995 | |
| RE35696 Heat injection process | 171 | 1995 | |
| 5,862,858 Flameless combustor | 264 | 1996 | |
| 5,899,269 Flameless combustor | 279 | 1996 | |
| 6,056,057 Heater well method and apparatus | 274 | 1997 | |
| 6,079,499 Heater well method and apparatus | 269 | 1997 | |
| 6,094,048 NMR logging of natural gas reservoirs | 249 | 1997 | |
| 6,023,554 Electrical heater | 275 | 1998 | |
| 6,102,122 Control of heat injection based on temperature and in-situ stress measurement | 249 | 1998 | |
| 6,019,172 Flameless combustor | 253 | 1999 | |
|
|
|||
| 4,274,487 Indirect thermal stimulation of production wells | 255 | 1979 | |
| 4,537,252 Method of underground conversion of coal | 247 | 1984 | |
| 4,662,439 Method of underground conversion of coal | 247 | 1985 | |
| 4,662,443 Combination air-blown and oxygen-blown underground coal gasification process | 249 | 1985 | |
| 5,014,788 Method of increasing the permeability of a coal seam | 167 | 1990 | |
| 5,388,640 Method for producing methane-containing gaseous mixtures | 253 | 1993 | |
| 5,388,641 Method for reducing the inert gas fraction in methane-containing gaseous mixtures obtained from underground formations | 250 | 1993 | |
| 5,388,642 Coalbed methane recovery using membrane separation of oxygen from air | 250 | 1993 | |
| 5,388,643 Coalbed methane recovery using pressure swing adsorption separation | 247 | 1993 | |
| 5,388,645 Method for producing methane-containing gaseous mixtures | 253 | 1993 | |
| 5,439,054 Method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation | 254 | 1994 | |
| 5,454,666 Method for disposing of unwanted gaseous fluid components within a solid carbonaceous subterranean formation | 259 | 1994 | |
| 5,566,756 Method for recovering methane from a solid carbonaceous subterranean formation | 175 | 1995 | |
|
|
|||
| 4,549,396 Conversion of coal to electricity | 252 | 1982 | |
| 4,476,927 Method for controlling H.sub.2 /CO ratio of in-situ coal gasification product gas | 141 | 1982 | |
| 4,530,401 Method for maximum in-situ visbreaking of heavy oil | 246 | 1982 | |
| 4,573,530 In-situ gasification of tar sands utilizing a combustible gas | 240 | 1983 | |
| 4,598,770 Thermal recovery method for viscous oil | 275 | 1984 | |
| 4,669,542 Simultaneous recovery of crude from multiple zones in a reservoir | 247 | 1984 | |
| 4,787,452 Disposal of produced formation fines during oil recovery | 259 | 1987 | |
| 4,982,786 Use of CO.sub.2 /steam to enhance floods in horizontal wellbores | 234 | 1989 | |
| 5,211,230 Method for enhanced oil recovery through a horizontal production well in a subsurface formation by in-situ combustion | 268 | 1992 | |
| 5,339,904 Oil recovery optimization using a well having both horizontal and vertical sections | 240 | 1992 | |
| 5,415,231 Method for producing low permeability reservoirs using steam | 250 | 1994 | |
| 5,431,224 Method of thermal stimulation for recovery of hydrocarbons | 257 | 1994 | |
|
|
|||
| 4,984,594 Vacuum method for removing soil contamination utilizing surface electrical heating | 297 | 1989 | |
| 5,190,405 Vacuum method for removing soil contaminants utilizing thermal conduction heating | 284 | 1990 | |
| 5,229,583 Surface heating blanket for soil remediation | 271 | 1992 | |
| 5,318,116 Vacuum method for removing soil contaminants utilizing thermal conduction heating | 288 | 1993 | |
| 5,553,189 Radiant plate heater for treatment of contaminated surfaces | 264 | 1994 | |
| 5,656,239 Method for recovering contaminants from soil utilizing electrical heating | 268 | 1995 | |
| 6,102,622 Remediation method | 264 | 1998 | |
| 5,997,214 Remediation method | 262 | 1998 | |
| 6,485,232 Low cost, self regulating heater for use in an in situ thermal desorption soil remediation system | 245 | 2000 | |
|
|
|||
| 4,299,086 Utilization of energy obtained by substoichiometric combustion of low heating value gases | 259 | 1978 | |
| 4,186,801 In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations | 251 | 1978 | |
| 4,250,962 In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations | 247 | 1979 | |
| 4,273,188 In situ combustion process for the recovery of liquid carbonaceous fuels from subterranean formations | 248 | 1980 | |
| 4,381,641 Substoichiometric combustion of low heating value gases | 278 | 1980 | |
| 4,366,668 Substoichiometric combustion of low heating value gases | 263 | 1981 | |
| 4,363,361 Substoichiometric combustion of low heating value gases | 254 | 1981 | |
|
|
|||
| 2002/0084,056 Aluminium alloy strips with high surface homogeneity and method for making same | 2001 | ||
| 2002/0084,056 Aluminium alloy strips with high surface homogeneity and method for making same | 2001 | ||
| 2002/0084,056 Aluminium alloy strips with high surface homogeneity and method for making same | 2001 | ||
| 2002/0084,056 Aluminium alloy strips with high surface homogeneity and method for making same | 2001 | ||
| 2002/0084,056 Aluminium alloy strips with high surface homogeneity and method for making same | 2001 | ||
|
|
|||
| 4,524,826 Method of heating an oil shale formation | 260 | 1982 | |
| 4,592,423 Hydrocarbon stratum retorting means and method | 246 | 1984 | |
| 4,576,231 Method and apparatus for combating encroachment by in situ treated formations | 265 | 1984 | |
| 4,682,652 Producing hydrocarbons through successively perforated intervals of a horizontal well between two vertical wells | 253 | 1986 | |
| 5,632,336 Method for improving injectivity of fluids in oil reservoirs | 247 | 1994 | |
|
|
|||
| 4,597,441 Recovery of oil by in situ hydrogenation | 279 | 1984 | |
| 4,691,771 Recovery of oil by in-situ combustion followed by in-situ hydrogenation | 255 | 1986 | |
| 6,016,867 Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking | 268 | 1998 | |
| 6,016,868 Production of synthetic crude oil from heavy hydrocarbons recovered by in situ hydrovisbreaking | 279 | 1998 | |
| 6,328,104 Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking | 271 | 2000 | |
|
|
|||
| 4,818,370 Process for converting heavy crudes, tars, and bitumens to lighter products in the presence of brine at supercritical conditions | 276 | 1987 | |
| 4,983,319 Preparation of low-viscosity improved stable crude oil transport emulsions | 259 | 1988 | |
| 5,340,467 Process for recovery of hydrocarbons and rejection of sand | 288 | 1991 | |
| 5,316,664 Process for recovery of hydrocarbons and rejection of sand | 287 | 1992 | |
|
|
|||
| 4,265,307 Shale oil recovery | 240 | 1978 | |
| 4,353,418 In situ retorting of oil shale | 259 | 1980 | |
| 4,457,374 Transient response process for detecting in situ retorting conditions | 226 | 1982 | |
|
|
|||
| 4,250,230 Generating electricity from coal in situ | 264 | 1979 | |
| 4,463,807 Minimizing subsidence effects during production of coal in situ | 139 | 1983 | |
| 4,448,252 Minimizing subsidence effects during production of coal in situ | 139 | 1983 | |
|
|
|||
| 5,099,918 Power sources for downhole electrical heating | 249 | 1991 | |
| 5,621,844 Electrical heating of mineral well deposits using downhole impedance transformation networks | 269 | 1995 | |
| 5,713,415 Low flux leakage cables and cable terminations for A.C. electrical heating of oil deposits | 256 | 1996 | |
|
|
|||
| 4,324,292 Process for recovering products from oil shale | 246 | 1980 | |
| 4,396,062 Apparatus and method for time-domain tracking of high-speed chemical reactions | 264 | 1980 | |
| 4,409,090 Process for recovering products from tar sand | 260 | 1982 | |
|
|
|||
| 4,489,782 Viscous oil production using electrical current heating and lateral drain holes | 273 | 1983 | |
| 4,651,825 Enhanced well production | 253 | 1986 | |
|
|
|||
| 4,412,585 Electrothermal process for recovering hydrocarbons | 247 | 1982 | |
| 4,501,445 Method of in-situ hydrogenation of carbonaceous material | 253 | 1983 | |
|
|
|||
| 5,411,104 Coalbed methane drilling | 309 | 1994 | |
| 5,402,847 Coal bed methane recovery | 146 | 1994 | |
|
|
|||
| 4,772,634 Apparatus and method for methanol production using a fuel cell to regulate the gas composition entering the methanol synthesizer | 247 | 1986 | |
| 5,554,453 Carbonate fuel cell system with thermally integrated gasification | 272 | 1995 | |
|
|
|||
| 4,524,827 Single well stimulation for the recovery of liquid hydrocarbons from subsurface formations | 262 | 1983 | |
| 5,751,895 Selective excitation of heating electrodes for oil wells | 239 | 1996 | |
|
|
|||
| RE30738 Apparatus and method for in situ heat processing of hydrocarbonaceous formations | 285 | 1980 | |
| 4,498,535 Apparatus and method for in situ controlled heat processing of hydrocarbonaceous formations with a controlled parameter line | 243 | 1982 | |
|
|
|||
| 5,020,596 Enhanced oil recovery system with a radiant tube heater | 241 | 1990 | |
| 5,082,055 Gas fired radiant tube heater | 254 | 1991 | |
|
|
|||
| 5,984,010 Hydrocarbon recovery systems and methods | 248 | 1997 | |
| 6,173,775 Systems and methods for hydrocarbon recovery | 248 | 1999 | |
|
|
|||
| 4,716,960 Method and system for introducing electric current into a well | 285 | 1986 | |
| 5,207,273 Method and apparatus for pumping wells | 252 | 1990 | |
|
|
|||
| 6,172,124 Process for converting gas to liquids | 252 | 1997 | |
| 6,085,512 Synthesis gas production system and method | 255 | 1999 | |
|
|
|||
| 5,284,878 Liquid phase methanol process with co-rich recycle | 143 | 1993 | |
|
|
|||
| 6,412,559 Process for recovering methane and/or sequestering fluids | 250 | 2000 | |
|
|
|||
| 4,228,854 Enhanced oil recovery using electrical means | 251 | 1979 | |
|
|
|||
| 4,277,416 Process for producing methanol | 254 | 1977 | |
|
|
|||
| 4,384,948 Single unit RCC | 119 | 1981 | |
|
|
|||
| 5,968,349 Extraction of bitumen from bitumen froth and biotreatment of bitumen froth tailings generated from tar sands | 276 | 1998 | |
|
|
|||
| 4,694,907 Thermally-enhanced oil recovery method and apparatus | 273 | 1986 | |
|
|
|||
| 6,389,814 Hydrocarbon combustion power generation system with CO2 sequestration | 180 | 2000 | |
|
|
|||
| 4,860,544 Closed cryogenic barrier for containment of hazardous material migration in the earth | 277 | 1988 | |
|
|
|||
| 4,974,425 Closed cryogenic barrier for containment of hazardous material migration in the earth | 275 | 1989 | |
|
|
|||
| 5,861,137 Steam reformer with internal hydrogen purification | 417 | 1996 | |
|
|
|||
| 4,817,711 System for recovery of petroleum from petroleum impregnated media | 284 | 1987 | |
|
|
|||
| 5,491,969 Power plant utilizing compressed air energy storage and saturation | 247 | 1995 | |
|
|
|||
| 4,456,065 Heavy oil recovering | 269 | 1981 | |
|
|
|||
| 5,437,506 System for measuring the transfer time of a sound-wave in a gas and thereby calculating the temperature of the gas | 246 | 1993 | |
|
|
|||
| 4,927,857 Method of methanol production | 280 | 1989 | |
|
|
|||
| 4,390,067 Method of treating reservoirs containing very viscous crude oil or bitumen | 348 | 1981 | |
|
|
|||
| 4,458,757 In situ shale-oil recovery process | 236 | 1983 | |
|
|
|||
| 5,339,897 Recovery and upgrading of hydrocarbon utilizing in situ combustion and horizontal wells | 304 | 1992 | |
|
|
|||
| 5,285,846 Thermal mineral extraction system | 252 | 1992 | |
|
|
|||
| 5,985,138 Tar sands extraction process | 257 | 1998 | |
|
|
|||
| 5,767,584 Method for generating electrical power from fuel cell powered cars parked in a conventional parking lot | 189 | 1995 | |
|
|
|||
| 4,501,326 In-situ recovery of viscous hydrocarbonaceous crude oil | 243 | 1983 | |
|
|
|||
| 4,637,464 In situ retorting of oil shale with pulsed water purge | 250 | 1984 | |
|
|
|||
| 4,299,285 Underground gasification of bituminous coal | 243 | 1980 | |
|
|
|||
| 5,676,212 Downhole electrode for well guidance system | 148 | 1996 | |
|
|
|||
| 4,793,656 In-situ coal drying | 136 | 1987 | |
|
|
|||
| 6,187,465 Process and system for converting carbonaceous feedstocks into energy without greenhouse gas emissions | 179 | 1998 | |
|
|
|||
| 4,397,732 Process for coal liquefaction employing selective coal feed | 242 | 1982 | |
|
|
|||
| 4,485,869 Recovery of liquid hydrocarbons from oil shale by electromagnetic heating in situ | 280 | 1982 | |
|
|
|||
| 4,856,587 Recovery of oil from oil-bearing formation by continually flowing pressurized heated gas through channel alongside matrix | 246 | 1988 | |
|
|
|||
| 4,608,818 Medium-load power-generating plant with integrated coal gasification plant | 251 | 1984 | |
|
|
|||
| 4,994,093 Method of producing methanol synthesis gas | 248 | 1990 | |
|
|
|||
| 4,508,170 Method of increasing the yield of hydrocarbons from a subterranean formation | 155 | 1983 | |
|
|
|||
| 4,407,973 Methanol from coal and natural gas | 249 | 1982 | |
|
|
|||
| 5,064,006 Downhole combination tool | 278 | 1988 | |
|
|
|||
| 5,229,102 Catalytic ceramic membrane steam-hydrocarbon reformer | 227 | 1990 | |
|
|
|||
| 4,412,124 Electrode unit for electrically heating underground hydrocarbon deposits | 245 | 1981 | |
|
|
|||
| 4,378,048 Substoichiometric combustion of low heating value gases using different platinum catalysts | 244 | 1981 | |
|
|
|||
| 5,517,593 Control system for well stimulation apparatus with response time temperature rise used in determining heater control temperature setpoint | 263 | 1995 | |
|
|
|||
| 5,261,490 Method for dumping and disposing of carbon dioxide gas and apparatus therefor | 256 | 1992 | |
|
|
|||
| 6,015,015 Insulated and/or concentric coiled tubing | 274 | 1997 | |
|
|
|||
| 4,662,438 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 | 252 | 1985 | |
|
|
|||
| 5,182,792 Process of electric pipeline heating utilizing heating elements inserted in pipelines | 243 | 1991 | |
|
|
|||
| 4,931,171 Pyrolysis of carbonaceous materials | 119 | 1982 | |
|
|
|||
| 5,289,882 Sealed electrical conductor method and arrangement for use with a well bore in hazardous areas | 267 | 1991 | |
|
|
|||
| 4,197,911 Process for in situ coal gasification | 241 | 1978 | |
|
|
|||
| 4,928,765 Method and apparatus for shale gas recovery | 252 | 1988 | |
|
|
|||
| 4,457,365 In situ radio frequency selective heating system | 266 | 1981 | |
|
|
|||
| 5,008,085 Apparatus for thermal treatment of a hydrocarbon stream | 251 | 1989 | |
|
|
|||
| 5,050,386 Method and apparatus for containment of hazardous material migration in the earth | 270 | 1990 | |
|
|
|||
| 4,183,405 Enhanced recoveries of petroleum and hydrogen from underground reservoirs | 261 | 1978 | |
|
|
|||
| 4,737,267 Oil shale processing apparatus and method | 129 | 1986 | |
|
|
|||
| 4,252,191 Method of recovering petroleum and bitumen from subterranean reservoirs | 255 | 1979 | |
|
|
|||
| 6,354,373 Expandable tubing for a well bore hole and method of expanding | 381 | 1998 | |
|
|
|||
| 5,349,859 Method and apparatus for measuring acoustic wave velocity using impulse response | 247 | 1991 | |
|
|
|||
| 4,605,680 Conversion of synthesis gas to diesel fuel and gasoline | 252 | 1985 | |
|
|
|||
| 4,513,816 Sealing system for a well bore in which a hot fluid is circulated | 242 | 1984 | |
|
|
|||
| 5,868,202 Hydrologic cells for recovery of hydrocarbons or thermal energy from coal, oil-shale, tar-sands and oil-bearing formations | 318 | 1997 | |
|
|
|||
| 4,384,613 Method of in-situ retorting of carbonaceous material for recovery of organic liquids and gases | 261 | 1980 | |
|
|
|||
| 4,848,924 Acoustic pyrometer | 258 | 1987 | |
|
|
|||
| 4,193,451 Method for production of organic products from kerogen | 250 | 1977 | |
|
|
|||
| 5,201,219 Method and apparatus for measuring free hydrocarbons and hydrocarbons potential from whole core | 230 | 1990 | |
|
|
|||
| 5,525,322 Method for simultaneous recovery of hydrogen from water and from hydrocarbons | 302 | 1994 | |
|
|
|||
| 5,126,037 Geopreater heating method and apparatus | 265 | 1990 | |
|
|
|||
| 4,524,113 Direct use of methanol fuel in a molten carbonate fuel cell | 138 | 1984 | |
|
|
|||
| 4,776,638 Method and apparatus for conversion of coal in situ | 266 | 1987 | |
|
|
|||
| 6,244,338 System for improving coalbed gas production | 142 | 1999 | |
|
|
|||
| 4,448,251 In situ conversion of hydrocarbonaceous oil | 175 | 1982 | |
|
|
|||
| 5,955,039 Coal gasification and hydrogen production system and method | 223 | 1996 | |
|
|
|||
| 6,152,987 Hydrogen gas-extraction module and method of fabrication | 282 | 1998 | |
|
|
|||
| 4,243,101 Coal gasification method | 251 | 1978 | |
| 4,306,621 Method for in situ coal gasification operations | 251 | 1980 | |
| 4,423,311 Electric heating apparatus for de-icing pipes | 252 | 1981 | |
| 4,444,255 Apparatus and process for the recovery of oil | 247 | 1981 | |
| 4,344,483 Multiple-site underground magnetic heating of hydrocarbons | 250 | 1981 | |
| 4,444,258 In situ recovery of oil from oil shale | 255 | 1981 | |
| 4,479,541 Method and apparatus for recovery of oil, gas and mineral deposits by panel opening | 232 | 1982 | |
| 4,762,425 System for temperature profile measurement in large furnances and kilns and method therefor | 256 | 1987 | |
| 4,895,206 Pulsed in situ exothermic shock wave and retorting process for hydrocarbon recovery and detoxification of selected wastes | 251 | 1989 | |
| 5,082,054 In-situ tuned microwave oil extraction process | 315 | 1990 | |
| 5,217,076 Method and apparatus for improved recovery of oil from porous, subsurface deposits (targevcir oricess) | 344 | 1991 | |
| 5,624,188 Acoustic thermometer | 250 | 1994 | |
| 6,112,808 Method and apparatus for subterranean thermal conditioning | 239 | 1997 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 14, 2016 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |