|
| US4008765 | 22. Dez. 1975 | 22. Febr. 1977 | Chevron Research Company | Method of recovering viscous petroleum from thick tar sand |
| US4019575 | 22. Dez. 1975 | 26. Apr. 1977 | Chevron Research Company | System for recovering viscous petroleum from thick tar sand |
| US4641710 | 13. Febr. 1986 | 10. Febr. 1987 | Applied Energy, Inc. | Enhanced recovery of subterranean deposits by thermal stimulation |
| US5285846 | 4. Nov. 1992 | 15. Febr. 1994 | Framo Developments (UK) Limited | Thermal mineral extraction system |
| US6588500 | 26. Jan. 2001 | 8. Juli 2003 | | Enhanced oil well production system |
| US7032675 | 6. Okt. 2003 | 25. Apr. 2006 | Halliburton Energy Services, Inc. | Thermally-controlled valves and methods of using the same in a wellbore |
| US7147057 | 6. Okt. 2003 | 12. Dez. 2006 | Halliburton Energy Services, Inc. | Loop systems and methods of using the same for conveying and distributing thermal energy into a wellbore |
| US7367399 | 21. Sept. 2006 | 6. Mai 2008 | Halliburton Energy Services, Inc. | Loop systems and methods of using the same for conveying and distributing thermal energy into a wellbore |