|
| US4026360 | 12 Ago 1976 | 31 May 1977 | Shell Oil Company | Hydrothermally forming a flow barrier in a leached subterranean oil shale formation |
| US4059308 | 15 Nov 1976 | 22 Nov 1977 | TRW Inc. | Pressure swing recovery system for oil shale deposits |
| US4065183 | 15 Nov 1976 | 27 Dic 1977 | TRW Inc. | Recovery system for oil shale deposits |
| US4083604 | 15 Nov 1976 | 11 Abr 1978 | TRW Inc. | Thermomechanical fracture for recovery system in oil shale deposits |
| US4545891 | 10 Mar 1983 | 8 Oct 1985 | TRW Inc. | Extraction and upgrading of fossil fuels using fused caustic and acid solutions |
| US4688637 | 27 Feb 1987 | 25 Ago 1987 | | Method for induced flow recovery of shallow crude oil deposits |
| US4815790 | 13 May 1988 | 28 Mar 1989 | NaTec, Ltd. | Nahcolite solution mining process |
| US5059307 | 11 Oct 1989 | 22 Oct 1991 | TRW Inc. | Process for upgrading coal |
| US5085764 | 19 Dic 1989 | 4 Feb 1992 | TRW Inc. | Process for upgrading coal |
| US5588713 | 20 Dic 1995 | 31 Dic 1996 | | Process for making sodium bicarbonate from Nahcolite-rich solutions |
| US6948562 | 24 Abr 2002 | 27 Sep 2005 | Shell Oil Company | Production of a blending agent using an in situ thermal process in a relatively permeable formation |
| US6959761 | 24 Abr 2001 | 1 Nov 2005 | Shell Oil Company | In situ thermal processing of a coal formation with a selected ratio of heat sources to production wells |
| US6964300 | 24 Abr 2002 | 15 Nov 2005 | Shell Oil Company | In situ thermal recovery from a relatively permeable formation with backproduction through a heater wellbore |
| US6966372 | 24 Abr 2001 | 22 Nov 2005 | Shell Oil Company | In situ thermal processing of a hydrocarbon containing formation to produce oxygen containing formation fluids |
| US6966374 | 24 Abr 2002 | 22 Nov 2005 | Shell Oil Company | In situ thermal recovery from a relatively permeable formation using gas to increase mobility |
| US6973967 | 24 Abr 2001 | 13 Dic 2005 | Shell Oil Company | Situ thermal processing of a coal formation using pressure and/or temperature control |
| US6981548 | 24 Abr 2002 | 3 Ene 2006 | Shell Oil Company | In situ thermal recovery from a relatively permeable formation |
| US6991045 | 24 Oct 2002 | 31 Ene 2006 | Shell Oil Company | Forming openings in a hydrocarbon containing formation using magnetic tracking |
| US6994160 | 24 Abr 2001 | 7 Feb 2006 | Shell Oil Company | In situ thermal processing of a hydrocarbon containing formation to produce hydrocarbons having a selected carbon number range |
| US6997255 | 24 Abr 2001 | 14 Feb 2006 | Shell Oil Company | In situ thermal processing of a hydrocarbon containing formation in a reducing environment |
| US6997518 | 24 Abr 2002 | 14 Feb 2006 | Shell Oil Company | In situ thermal processing and solution mining of an oil shale formation |
| US7004251 | 24 Abr 2002 | 28 Feb 2006 | Shell Oil Company | In situ thermal processing and remediation of an oil shale formation |
| US7011154 | 24 Oct 2002 | 14 Mar 2006 | Shell Oil Company | In situ recovery from a kerogen and liquid hydrocarbon containing formation |
| US7013972 | 24 Abr 2002 | 21 Mar 2006 | Shell Oil Company | In situ thermal processing of an oil shale formation using a natural distributed combustor |
| US7040397 | 24 Abr 2002 | 9 May 2006 | Shell Oil Company | Thermal processing of an oil shale formation to increase permeability of the formation |
| US7040398 | 24 Abr 2002 | 9 May 2006 | Shell Oil Company | In situ thermal processing of a relatively permeable formation in a reducing environment |
| US7040400 | 24 Abr 2002 | 9 May 2006 | Shell Oil Company | In situ thermal processing of a relatively impermeable formation using an open wellbore |
| US7051807 | 24 Abr 2002 | 30 May 2006 | Shell Oil Company | In situ thermal recovery from a relatively permeable formation with quality control |
| US7051808 | 24 Oct 2002 | 30 May 2006 | Shell Oil Company | Seismic monitoring of in situ conversion in a hydrocarbon containing formation |
| US7051811 | 24 Abr 2002 | 30 May 2006 | Shell Oil Company | In situ thermal processing through an open wellbore in an oil shale formation |
| US7063145 | 24 Oct 2002 | 20 Jun 2006 | Shell Oil Company | Methods and systems for heating a hydrocarbon containing formation in situ with an opening contacting the earth's surface at two locations |
| US7066254 | 24 Oct 2002 | 27 Jun 2006 | Shell Oil Company | In situ thermal processing of a tar sands formation |
| US7066257 | 24 Oct 2002 | 27 Jun 2006 | Shell Oil Company | In situ recovery from lean and rich zones in a hydrocarbon containing formation |
| US7073578 | 24 Oct 2003 | 11 Jul 2006 | Shell Oil Company | Staged and/or patterned heating during in situ thermal processing of a hydrocarbon containing formation |
| US7077198 | 24 Oct 2002 | 18 Jul 2006 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation using barriers |
| US7077199 | 24 Oct 2002 | 18 Jul 2006 | Shell Oil Company | In situ thermal processing of an oil reservoir formation |
| US7086465 | 24 Oct 2002 | 8 Ago 2006 | Shell Oil Company | In situ production of a blending agent from a hydrocarbon containing formation |
| US7086468 | 24 Abr 2001 | 8 Ago 2006 | Shell Oil Company | In situ thermal processing of a hydrocarbon containing formation using heat sources positioned within open wellbores |
| US7090013 | 24 Oct 2002 | 15 Ago 2006 | Shell Oil Company | In situ thermal processing of a hydrocarbon containing formation to produce heated fluids |
| US7096942 | 24 Abr 2002 | 29 Ago 2006 | Shell Oil Company | In situ thermal processing of a relatively permeable formation while controlling pressure |
| US7096953 | 24 Abr 2001 | 29 Ago 2006 | Shell Oil Company | In situ thermal processing of a coal formation using a movable heating element |
| US7100994 | 24 Oct 2002 | 5 Sep 2006 | Shell Oil Company | Producing hydrocarbons and non-hydrocarbon containing materials when treating a hydrocarbon containing formation |
| US7104319 | 24 Oct 2002 | 12 Sep 2006 | Shell Oil Company | In situ thermal processing of a heavy oil diatomite formation |
| US7114566 | 24 Oct 2002 | 3 Oct 2006 | Shell Oil Company | In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor |
| US7121341 | 24 Oct 2003 | 17 Oct 2006 | Shell Oil Company | Conductor-in-conduit temperature limited heaters |
| US7121342 | 23 Abr 2004 | 17 Oct 2006 | Shell Oil Company | Thermal processes for subsurface formations |
| US7128153 | 24 Oct 2002 | 31 Oct 2006 | Shell Oil Company | Treatment of a hydrocarbon containing formation after heating |
| US7156176 | 24 Oct 2002 | 2 Ene 2007 | Shell Oil Company | Installation and use of removable heaters in a hydrocarbon containing formation |
| US7165615 | 24 Oct 2002 | 23 Ene 2007 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation using conductor-in-conduit heat sources with an electrically conductive material in the overburden |
| US7207395 | 30 Ene 2004 | 24 Abr 2007 | CDX Gas, LLC | Method and system for testing a partially formed hydrocarbon well for evaluation and well planning refinement |
| US7219734 | 24 Oct 2003 | 22 May 2007 | Shell Oil Company | Inhibiting wellbore deformation during in situ thermal processing of a hydrocarbon containing formation |
| US7222670 | 27 Feb 2004 | 29 May 2007 | CDX Gas, LLC | System and method for multiple wells from a common surface location |
| US7225866 | 31 Ene 2006 | 5 Jun 2007 | Shell Oil Company | In situ thermal processing of an oil shale formation using a pattern of heat sources |
| US7264048 | 21 Abr 2003 | 4 Sep 2007 | CDX Gas, LLC | Slot cavity |
| US7320364 | 22 Abr 2005 | 22 Ene 2008 | Shell Oil Company | Inhibiting reflux in a heated well of an in situ conversion system |
| US7353872 | 22 Abr 2005 | 8 Abr 2008 | Shell Oil Company | Start-up of temperature limited heaters using direct current (DC) |
| US7357180 | 22 Abr 2005 | 15 Abr 2008 | Shell Oil Company | Inhibiting effects of sloughing in wellbores |
| US7360588 | 17 Oct 2006 | 22 Abr 2008 | Shell Oil Company | Thermal processes for subsurface formations |
| US7360595 | 8 May 2002 | 22 Abr 2008 | CDX GAS, LLC | Method and system for underground treatment of materials |
| US7370704 | 22 Abr 2005 | 13 May 2008 | Shell Oil Company | Triaxial temperature limited heater |
| US7383877 | 22 Abr 2005 | 10 Jun 2008 | Shell Oil Company | Temperature limited heaters with thermally conductive fluid used to heat subsurface formations |
| US7424915 | 22 Abr 2005 | 16 Sep 2008 | Shell Oil Company | Vacuum pumping of conductor-in-conduit heaters |
| US7431076 | 22 Abr 2005 | 7 Oct 2008 | Shell Oil Company | Temperature limited heaters using modulated DC power |
| US7435037 | 21 Abr 2006 | 14 Oct 2008 | Shell Oil Company | Low temperature barriers with heat interceptor wells for in situ processes |
| US7461691 | 23 Ene 2007 | 9 Dic 2008 | Shell Oil Company | In situ recovery from a hydrocarbon containing formation |
| US7481274 | 22 Abr 2005 | 27 Ene 2009 | Shell Oil Company | Temperature limited heaters with relatively constant current |
| US7490665 | 22 Abr 2005 | 17 Feb 2009 | Shell Oil Company | Variable frequency temperature limited heaters |
| US7500528 | 21 Abr 2006 | 10 Mar 2009 | Shell Oil Company | Low temperature barrier wellbores formed using water flushing |
| US7510000 | 22 Abr 2005 | 31 Mar 2009 | Shell Oil Company | Reducing viscosity of oil for production from a hydrocarbon containing formation |
| US7527094 | 21 Abr 2006 | 5 May 2009 | Shell Oil Company | Double barrier system for an in situ conversion process |
| US7533719 | 20 Abr 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 |
| US7546873 | 21 Abr 2006 | 16 Jun 2009 | Shell Oil Company | Low temperature barriers for use with in situ processes |
| 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 |
| US7571771 | 31 May 2005 | 11 Ago 2009 | CDX Gas, LLC | Cavity well system |
| US7575052 | 21 Abr 2006 | 18 Ago 2009 | Shell Oil Company | In situ conversion process utilizing a closed loop heating system |
| US7575053 | 21 Abr 2006 | 18 Ago 2009 | Shell Oil Company | Low temperature monitoring system for subsurface barriers |
| 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 Abr 2007 | 6 Oct 2009 | Shell Oil Company | Temperature limited heaters using phase transformation of ferromagnetic material |
| US7604052 | 20 Abr 2007 | 20 Oct 2009 | Shell Oil Company | Compositions produced using an in situ heat treatment process |
| US7610962 | 20 Abr 2007 | 3 Nov 2009 | Shell Oil Company | Sour gas injection for use with in situ heat treatment |
| US7631689 | 20 Abr 2007 | 15 Dic 2009 | Shell Oil Company | Sulfur barrier for use with in situ processes for treating formations |
| US7631690 | 19 Oct 2007 | 15 Dic 2009 | Shell Oil Company | Heating hydrocarbon containing formations in a spiral startup staged sequence |
| US7635023 | 20 Abr 2007 | 22 Dic 2009 | Shell Oil Company | Time sequenced heating of multiple layers in a hydrocarbon containing formation |
| US7635024 | 19 Oct 2007 | 22 Dic 2009 | Shell Oil Company | Heating tar sands formations to visbreaking temperatures |
| US7635025 | 20 Oct 2006 | 22 Dic 2009 | Shell Oil Company | Cogeneration systems and processes for treating hydrocarbon containing formations |
| US7640980 | 7 Abr 2008 | 5 Ene 2010 | Shell Oil Company | Thermal processes for subsurface formations |
| US7640987 | 17 Ago 2005 | 5 Ene 2010 | Halliburton Energy Services, Inc. | Communicating fluids with a heated-fluid generation system |
| US7644765 | 19 Oct 2007 | 12 Ene 2010 | Shell Oil Company | Heating tar sands formations while controlling pressure |
| US7644993 | 22 Mar 2007 | 12 Ene 2010 | ExxonMobil Upstream Research Company | In situ co-development of oil shale with mineral recovery |
| US7673681 | 19 Oct 2007 | 9 Mar 2010 | Shell Oil Company | Treating tar sands formations with karsted zones |
| US7673786 | 20 Abr 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 Abr 2007 | 23 Mar 2010 | Shell Oil Company | Adjusting alloy compositions for selected properties in temperature limited heaters |
| US7703513 | 19 Oct 2007 | 27 Abr 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 |
| US7735935 | 1 Jun 2007 | 15 Jun 2010 | Shell Oil Company | In situ thermal processing of an oil shale formation containing carbonate minerals |
| US7770643 | 10 Oct 2006 | 10 Ago 2010 | Halliburton Energy Services, Inc. | Hydrocarbon recovery using fluids |
| US7785427 | 20 Abr 2007 | 31 Ago 2010 | Shell Oil Company | High strength alloys |
| US7793722 | 20 Abr 2007 | 14 Sep 2010 | Shell Oil Company | Non-ferromagnetic overburden casing |
| US7798220 | 18 Abr 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 |
| US7809538 | 13 Ene 2006 | 5 Oct 2010 | Halliburton Energy Services, Inc. | Real time monitoring and control of thermal recovery operations for heavy oil reservoirs |
| US7831134 | 21 Abr 2006 | 9 Nov 2010 | Shell Oil Company | Grouped exposed metal heaters |
| US7832482 | 10 Oct 2006 | 16 Nov 2010 | Halliburton Energy Services, Inc. | Producing resources using steam injection |
| US7832484 | 18 Abr 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 Abr 2008 | 30 Nov 2010 | Shell Oil Company | In situ heat treatment from multiple layers of a tar sands formation |
| US7841425 | 18 Abr 2008 | 30 Nov 2010 | Shell Oil Company | Drilling subsurface wellbores with cutting structures |
| US7845411 | 19 Oct 2007 | 7 Dic 2010 | Shell Oil Company | In situ heat treatment process utilizing a closed loop heating system |
| US7849922 | 18 Abr 2008 | 14 Dic 2010 | Shell Oil Company | In situ recovery from residually heated sections in a hydrocarbon containing formation |
| US7860377 | 21 Abr 2006 | 28 Dic 2010 | Shell Oil Company | Subsurface connection methods for subsurface heaters |
| US7866385 | 20 Abr 2007 | 11 Ene 2011 | Shell Oil Company | Power systems utilizing the heat of produced formation fluid |
| US7866386 | 13 Oct 2008 | 11 Ene 2011 | Shell Oil Company | In situ oxidation of subsurface formations |
| US7866388 | 13 Oct 2008 | 11 Ene 2011 | Shell Oil Company | High temperature methods for forming oxidizer fuel |
| US7912358 | 20 Abr 2007 | 22 Mar 2011 | Shell Oil Company | Alternate energy source usage for in situ heat treatment processes |
| US7931086 | 18 Abr 2008 | 26 Abr 2011 | Shell Oil Company | Heating systems for heating subsurface formations |
| US7942197 | 21 Abr 2006 | 17 May 2011 | Shell Oil Company | Methods and systems for producing fluid from an in situ conversion process |
| US7942203 | 4 Ene 2010 | 17 May 2011 | Shell Oil Company | Thermal processes for subsurface formations |
| US7950453 | 18 Abr 2008 | 31 May 2011 | Shell Oil Company | Downhole burner systems and methods for heating subsurface formations |
| US7986869 | 21 Abr 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 Abr 2006 | 27 Sep 2011 | Shell Oil Company | In situ conversion process systems utilizing wellbores in at least two regions of a formation |
| US8042610 | 18 Abr 2008 | 25 Oct 2011 | Shell Oil Company | Parallel heater system for subsurface formations |
| US8070840 | 21 Abr 2006 | 6 Dic 2011 | Shell Oil Company | Treatment of gas from an in situ conversion process |
| US8082995 | 14 Nov 2008 | 27 Dic 2011 | ExxonMobil Upstream Research Company | Optimization of untreated oil shale geometry to control subsidence |
| US8083813 | 20 Abr 2007 | 27 Dic 2011 | Shell Oil Company | Methods of producing transportation fuel |
| US8087460 | 7 Mar 2008 | 3 Ene 2012 | ExxonMobil Upstream Research Company | Granular electrical connections for in situ formation heating |
| US8104537 | 15 Dic 2009 | 31 Ene 2012 | ExxonMobil Upstream Research Company | Method of developing subsurface freeze zone |
| US8113272 | 13 Oct 2008 | 14 Feb 2012 | Shell Oil Company | Three-phase heaters with common overburden sections for heating subsurface formations |
| US8122955 | 18 Abr 2008 | 28 Feb 2012 | ExxonMobil Upstream Research Company | Downhole burners for in situ conversion of organic-rich rock formations |
| US8146661 | 13 Oct 2008 | 3 Abr 2012 | Shell Oil Company | Cryogenic treatment of gas |
| US8146664 | 21 May 2008 | 3 Abr 2012 | ExxonMobil Upstream Research Company | Utilization of low BTU gas generated during in situ heating of organic-rich rock |
| US8146669 | 13 Oct 2008 | 3 Abr 2012 | Shell Oil Company | Multi-step heater deployment in a subsurface formation |
| US8151877 | 18 Abr 2008 | 10 Abr 2012 | ExxonMobil Upstream Research Company | Downhole burner wells for in situ conversion of organic-rich rock formations |
| US8151880 | 9 Dic 2010 | 10 Abr 2012 | Shell Oil Company | Methods of making transportation fuel |
| US8151884 | 10 Oct 2007 | 10 Abr 2012 | ExxonMobil Upstream Research Company | Combined development of oil shale by in situ heating with a deeper hydrocarbon resource |
| US8151907 | 10 Abr 2009 | 10 Abr 2012 | Shell Oil Company | Dual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations |
| US8162059 | 13 Oct 2008 | 24 Abr 2012 | Shell Oil Company | Induction heaters used to heat subsurface formations |
| US8162405 | 10 Abr 2009 | 24 Abr 2012 | Shell Oil Company | Using tunnels for treating subsurface hydrocarbon containing formations |
| US8172335 | 10 Abr 2009 | 8 May 2012 | Shell Oil Company | Electrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations |
| US8177305 | 10 Abr 2009 | 15 May 2012 | Shell Oil Company | Heater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations |
| US8191630 | 28 Abr 2010 | 5 Jun 2012 | Shell Oil Company | Creating fluid injectivity in tar sands formations |
| US8192682 | 26 Abr 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 Abr 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 Ago 2012 | Shell Oil Company | High voltage temperature limited heaters |
| US8240774 | 13 Oct 2008 | 14 Ago 2012 | Shell Oil Company | Solution mining and in situ treatment of nahcolite beds |
