|
| US3945435 | 7 Nov 1974 | 23 Mar 1976 | The Ralph M. Parsons Co. | In situ recovery of hydrocarbons from tar sands |
| US3946810 | 7 Nov 1974 | 30 Mar 1976 | The Ralph M. Parsons Company | In situ recovery of hydrocarbons from tar sands |
| US4087130 | 14 Apr 1977 | 2 May 1978 | Occidental Petroleum Corporation | Process for the gasification of coal in situ |
| US4362213 | 19 Nov 1980 | 7 Dec 1982 | Hydrocarbon Research, Inc. | Method of in situ oil extraction using hot solvent vapor injection |
| US4396064 | 14 May 1981 | 2 Aug 1983 | Atlantic Richfield Company | Method and apparatus for injecting a gaseous stream into a subterranean zone |
| US4399867 | 14 May 1981 | 23 Aug 1983 | Atlantic Richfield Company | Method for injecting a gaseous stream into a hot subterranean zone |
| US4407367 | 14 Oct 1980 | 4 Oct 1983 | HRI, Inc. | Method for in situ recovery of heavy crude oils and tars by hydrocarbon vapor injection |
| US4438816 | 13 May 1982 | 27 Mar 1984 | UOP Inc. | Process for recovery of hydrocarbons from oil shale |
| US4446921 | 16 Mar 1982 | 8 May 1984 | FRIED. Krupp Gesellschaft mit beschrankter Haftung | Method for underground gasification of solid fuels |
| US4449586 | 11 Jun 1982 | 22 May 1984 | UOP Inc. | Process for the recovery of hydrocarbons from oil shale |
| US4450913 | 14 Jun 1982 | 29 May 1984 | Texaco Inc. | Superheated solvent method for recovering viscous petroleum |
| US4484630 | 8 Mar 1983 | 27 Nov 1984 | Mobil Oil Corporation | Method for recovering heavy crudes from shallow reservoirs |
| US5014787 | 16 Aug 1989 | 14 May 1991 | Chevron Research Company | Single well injection and production system |
| US7320364 | 22 Apr 2005 | 22 Jan 2008 | Shell Oil Company | Inhibiting reflux in a heated well of an in situ conversion system |
| US7357180 | 22 Apr 2005 | 15 Apr 2008 | Shell Oil Company | Inhibiting effects of sloughing in wellbores |
| US7360588 | 17 Oct 2006 | 22 Apr 2008 | Shell Oil Company | Thermal processes for subsurface formations |
| US7370704 | 22 Apr 2005 | 13 May 2008 | Shell Oil Company | Triaxial temperature limited heater |
| US7383877 | 22 Apr 2005 | 10 Jun 2008 | Shell Oil Company | Temperature limited heaters with thermally conductive fluid used to heat subsurface formations |
| US7431076 | 22 Apr 2005 | 7 Oct 2008 | Shell Oil Company | Temperature limited heaters using modulated DC power |
| US7441603 | 30 Jul 2004 | 28 Oct 2008 | ExxonMobil Upstream Research Company | Hydrocarbon recovery from impermeable oil shales |
| US7461691 | 23 Jan 2007 | 9 Dec 2008 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
| US7481274 | 22 Apr 2005 | 27 Jan 2009 | Shell Oil Company | Temperature limited heaters with relatively constant current |
| US7490665 | 22 Apr 2005 | 17 Feb 2009 | Shell Oil Company | Variable frequency temperature limited heaters |
| US7533719 | 20 Apr 2007 | 19 May 2009 | Shell Oil Company | Wellhead with non-ferromagnetic materials |
| US7540324 | 19 Oct 2007 | 2 Jun 2009 | Shell Oil Company | Heating hydrocarbon containing formations in a checkerboard pattern staged process |
| US7549470 | 20 Oct 2006 | 23 Jun 2009 | Shell Oil Company | Solution mining and heating by oxidation for treating hydrocarbon containing formations |
| US7556095 | 20 Oct 2006 | 7 Jul 2009 | Shell Oil Company | Solution mining dawsonite from hydrocarbon containing formations with a chelating agent |
| US7556096 | 20 Oct 2006 | 7 Jul 2009 | Shell Oil Company | Varying heating in dawsonite zones in hydrocarbon containing formations |
| US7559367 | 20 Oct 2006 | 14 Jul 2009 | Shell Oil Company | Temperature limited heater with a conduit substantially electrically isolated from the formation |
| US7559368 | 20 Oct 2006 | 14 Jul 2009 | Shell Oil Company | Solution mining systems and methods for treating hydrocarbon containing formations |
| US7562706 | 20 Oct 2006 | 21 Jul 2009 | Shell Oil Company | Systems and methods for producing hydrocarbons from tar sands formations |
| US7562707 | 19 Oct 2007 | 21 Jul 2009 | Shell Oil Company | Heating hydrocarbon containing formations in a line drive staged process |
| US7581589 | 20 Oct 2006 | 1 Sep 2009 | Shell Oil Company | Methods of producing alkylated hydrocarbons from an in situ heat treatment process liquid |
| US7584789 | 20 Oct 2006 | 8 Sep 2009 | Shell Oil Company | Methods of cracking a crude product to produce additional crude products |
| US7591310 | 20 Oct 2006 | 22 Sep 2009 | Shell Oil Company | Methods of hydrotreating a liquid stream to remove clogging compounds |
| US7597147 | 20 Apr 2007 | 6 Oct 2009 | Shell Oil Company | Temperature limited heaters using phase transformation of ferromagnetic material |
| US7604052 | 20 Apr 2007 | 20 Oct 2009 | Shell Oil Company | Compositions produced using an in situ heat treatment process |
| US7610962 | 20 Apr 2007 | 3 Nov 2009 | Shell Oil Company | Sour gas injection for use with in situ heat treatment |
| US7631689 | 20 Apr 2007 | 15 Dec 2009 | Shell Oil Company | Sulfur barrier for use with in situ processes for treating formations |
| US7631690 | 19 Oct 2007 | 15 Dec 2009 | Shell Oil Company | Heating hydrocarbon containing formations in a spiral startup staged sequence |
| US7635023 | 20 Apr 2007 | 22 Dec 2009 | Shell Oil Company | Time sequenced heating of multiple layers in a hydrocarbon containing formation |
| US7635024 | 19 Oct 2007 | 22 Dec 2009 | Shell Oil Company | Heating tar sands formations to visbreaking temperatures |
| US7635025 | 20 Oct 2006 | 22 Dec 2009 | Shell Oil Company | Cogeneration systems and processes for treating hydrocarbon containing formations |
| US7640980 | 7 Apr 2008 | 5 Jan 2010 | Shell Oil Company | Thermal processes for subsurface formations |
| US7644765 | 19 Oct 2007 | 12 Jan 2010 | Shell Oil Company | Heating tar sands formations while controlling pressure |
| US7673681 | 19 Oct 2007 | 9 Mar 2010 | Shell Oil Company | Treating tar sands formations with karsted zones |
| US7673786 | 20 Apr 2007 | 9 Mar 2010 | Shell Oil Company | Welding shield for coupling heaters |
| US7677310 | 19 Oct 2007 | 16 Mar 2010 | Shell Oil Company | Creating and maintaining a gas cap in tar sands formations |
| US7677314 | 19 Oct 2007 | 16 Mar 2010 | Shell Oil Company | Method of condensing vaporized water in situ to treat tar sands formations |
| US7681647 | 19 Oct 2007 | 23 Mar 2010 | Shell Oil Company | Method of producing drive fluid in situ in tar sands formations |
| US7683296 | 20 Apr 2007 | 23 Mar 2010 | Shell Oil Company | Adjusting alloy compositions for selected properties in temperature limited heaters |
| US7703513 | 19 Oct 2007 | 27 Apr 2010 | Shell Oil Company | Wax barrier for use with in situ processes for treating formations |
| US7717171 | 19 Oct 2007 | 18 May 2010 | Shell Oil Company | Moving hydrocarbons through portions of tar sands formations with a fluid |
| US7730945 | 19 Oct 2007 | 8 Jun 2010 | Shell Oil Company | Using geothermal energy to heat a portion of a formation for an in situ heat treatment process |
| US7730946 | 19 Oct 2007 | 8 Jun 2010 | Shell Oil Company | Treating tar sands formations with dolomite |
| US7730947 | 19 Oct 2007 | 8 Jun 2010 | Shell Oil Company | Creating fluid injectivity in tar sands formations |
| US7785427 | 20 Apr 2007 | 31 Aug 2010 | Shell Oil Company | High strength alloys |
| US7793722 | 20 Apr 2007 | 14 Sep 2010 | Shell Oil Company | Non-ferromagnetic overburden casing |
| US7798220 | 18 Apr 2008 | 21 Sep 2010 | Shell Oil Company | In situ heat treatment of a tar sands formation after drive process treatment |
| US7798221 | 31 May 2007 | 21 Sep 2010 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
| US7831133 | 21 Apr 2006 | 9 Nov 2010 | Shell Oil Company | Insulated conductor temperature limited heater for subsurface heating coupled in a three-phase WYE configuration |
| US7831134 | 21 Apr 2006 | 9 Nov 2010 | Shell Oil Company | Grouped exposed metal heaters |
| US7832484 | 18 Apr 2008 | 16 Nov 2010 | Shell Oil Company | Molten salt as a heat transfer fluid for heating a subsurface formation |
| US7841401 | 19 Oct 2007 | 30 Nov 2010 | Shell Oil Company | Gas injection to inhibit migration during an in situ heat treatment process |
| US7841408 | 18 Apr 2008 | 30 Nov 2010 | Shell Oil Company | In situ heat treatment from multiple layers of a tar sands formation |
| US7841425 | 18 Apr 2008 | 30 Nov 2010 | Shell Oil Company | Drilling subsurface wellbores with cutting structures |
| US7845411 | 19 Oct 2007 | 7 Dec 2010 | Shell Oil Company | In situ heat treatment process utilizing a closed loop heating system |
| US7849922 | 18 Apr 2008 | 14 Dec 2010 | Shell Oil Company | In situ recovery from residually heated sections in a hydrocarbon containing formation |
| US7857056 | 15 Oct 2008 | 28 Dec 2010 | ExxonMobil Upstream Research Company | Hydrocarbon recovery from impermeable oil shales using sets of fluid-heated fractures |
| US7860377 | 21 Apr 2006 | 28 Dec 2010 | Shell Oil Company | Subsurface connection methods for subsurface heaters |
| US7866385 | 20 Apr 2007 | 11 Jan 2011 | Shell Oil Company | Power systems utilizing the heat of produced formation fluid |
| US7866386 | 13 Oct 2008 | 11 Jan 2011 | Shell Oil Company | In situ oxidation of subsurface formations |
| US7866388 | 13 Oct 2008 | 11 Jan 2011 | Shell Oil Company | High temperature methods for forming oxidizer fuel |
| US7912358 | 20 Apr 2007 | 22 Mar 2011 | Shell Oil Company | Alternate energy source usage for in situ heat treatment processes |
| US7931086 | 18 Apr 2008 | 26 Apr 2011 | Shell Oil Company | Heating systems for heating subsurface formations |
| US7942203 | 4 Jan 2010 | 17 May 2011 | Shell Oil Company | Thermal processes for subsurface formations |
| US7950453 | 18 Apr 2008 | 31 May 2011 | Shell Oil Company | Downhole burner systems and methods for heating subsurface formations |
| US7980312 | 19 Jun 2006 | 19 Jul 2011 | | Integrated in situ retorting and refining of oil shale |
| US7986869 | 21 Apr 2006 | 26 Jul 2011 | Shell Oil Company | Varying properties along lengths of temperature limited heaters |
| US8011451 | 13 Oct 2008 | 6 Sep 2011 | Shell Oil Company | Ranging methods for developing wellbores in subsurface formations |
| US8027571 | 21 Apr 2006 | 27 Sep 2011 | Shell Oil Company | In situ conversion process systems utilizing wellbores in at least two regions of a formation |
| US8042610 | 18 Apr 2008 | 25 Oct 2011 | Shell Oil Company | Parallel heater system for subsurface formations |
| US8082995 | 14 Nov 2008 | 27 Dec 2011 | ExxonMobil Upstream Research Company | Optimization of untreated oil shale geometry to control subsidence |
| US8083813 | 20 Apr 2007 | 27 Dec 2011 | Shell Oil Company | Methods of producing transportation fuel |
| US8087460 | 7 Mar 2008 | 3 Jan 2012 | ExxonMobil Upstream Research Company | Granular electrical connections for in situ formation heating |
| US8113272 | 13 Oct 2008 | 14 Feb 2012 | Shell Oil Company | Three-phase heaters with common overburden sections for heating subsurface formations |
| US8122955 | 18 Apr 2008 | 28 Feb 2012 | ExxonMobil Upstream Research Company | Downhole burners for in situ conversion of organic-rich rock formations |
| US8146661 | 13 Oct 2008 | 3 Apr 2012 | Shell Oil Company | Cryogenic treatment of gas |
| US8146664 | 21 May 2008 | 3 Apr 2012 | ExxonMobil Upstream Research Company | Utilization of low BTU gas generated during in situ heating of organic-rich rock |
| US8146669 | 13 Oct 2008 | 3 Apr 2012 | Shell Oil Company | Multi-step heater deployment in a subsurface formation |
| US8151877 | 18 Apr 2008 | 10 Apr 2012 | ExxonMobil Upstream Research Company | Downhole burner wells for in situ conversion of organic-rich rock formations |
| US8151880 | 9 Dec 2010 | 10 Apr 2012 | Shell Oil Company | Methods of making transportation fuel |
| US8151884 | 10 Oct 2007 | 10 Apr 2012 | ExxonMobil Upstream Research Company | Combined development of oil shale by in situ heating with a deeper hydrocarbon resource |
| US8151907 | 10 Apr 2009 | 10 Apr 2012 | Shell Oil Company | Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations |
| US8162059 | 13 Oct 2008 | 24 Apr 2012 | Shell Oil Company | Induction heaters used to heat subsurface formations |
| US8162405 | 10 Apr 2009 | 24 Apr 2012 | Shell Oil Company | Using tunnels for treating subsurface hydrocarbon containing formations |
| US8172335 | 10 Apr 2009 | 8 May 2012 | Shell Oil Company | Electrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations |
| US8177305 | 10 Apr 2009 | 15 May 2012 | Shell Oil Company | Heater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations |
| US8191630 | 28 Apr 2010 | 5 Jun 2012 | Shell Oil Company | Creating fluid injectivity in tar sands formations |
| US8192682 | 26 Apr 2010 | 5 Jun 2012 | Shell Oil Company | High strength alloys |
| US8196658 | 13 Oct 2008 | 12 Jun 2012 | Shell Oil Company | Irregular spacing of heat sources for treating hydrocarbon containing formations |
| US8200072 | 24 Oct 2003 | 12 Jun 2012 | Shell Oil Company | Temperature limited heaters for heating subsurface formations or wellbores |
| US8220539 | 9 Oct 2009 | 17 Jul 2012 | Shell Oil Company | Controlling hydrogen pressure in self-regulating nuclear reactors used to treat a subsurface formation |
| US8224163 | 24 Oct 2003 | 17 Jul 2012 | Shell Oil Company | Variable frequency temperature limited heaters |
| US8224164 | 24 Oct 2003 | 17 Jul 2012 | Shell Oil Company | Insulated conductor temperature limited heaters |
| US8224165 | 21 Apr 2006 | 17 Jul 2012 | Shell Oil Company | Temperature limited heater utilizing non-ferromagnetic conductor |
| US8225866 | 21 Jul 2010 | 24 Jul 2012 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
| US8230927 | 16 May 2011 | 31 Jul 2012 | Shell Oil Company | Methods and systems for producing fluid from an in situ conversion process |
| US8230929 | 17 Mar 2009 | 31 Jul 2012 | ExxonMobil Upstream Research Company | Methods of producing hydrocarbons for substantially constant composition gas generation |
| US8233782 | 29 Sep 2010 | 31 Jul 2012 | Shell Oil Company | Grouped exposed metal heaters |
| US8238730 | 24 Oct 2003 | 7 Aug 2012 | Shell Oil Company | High voltage temperature limited heaters |
| US8240774 | 13 Oct 2008 | 14 Aug 2012 | Shell Oil Company | Solution mining and in situ treatment of nahcolite beds |
