E21B 36/02
Heating, cooling or insulating arrangements for boreholes or wells: using burners
Official title: using burners
E21B36/02 (Heating, cooling or insulating arrangements for boreholes or wells: using burners) appears on 220 US grants and 138 published applications in this corpus.
Search patents in E21B- Granted patents
- 220
- Published applications
- 138
- Assignees
- 84
- Inventors
- 305
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 12 | 0 |
| 1984 | 16 | 0 |
| 1985 | 12 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 8 |
| 2004 | 0 | 7 |
| 2005 | 3 | 3 |
| 2006 | 9 | 1 |
| 2007 | 1 | 4 |
| 2008 | 1 | 5 |
| 2009 | 0 | 17 |
| 2010 | 8 | 9 |
| 2011 | 3 | 7 |
| 2012 | 16 | 4 |
| 2013 | 8 | 12 |
| 2014 | 9 | 12 |
| 2015 | 7 | 15 |
| 2016 | 13 | 10 |
| 2017 | 6 | 1 |
| 2018 | 4 | 7 |
| 2019 | 5 | 3 |
| 2020 | 4 | 2 |
| 2021 | 1 | 1 |
| 2022 | 3 | 2 |
| 2023 | 1 | 2 |
| 2024 | 3 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Manipulation of fluids, fluid components and reactions in microfluidic systems31 Mar 2026US 12,590,508 B2Brandeis University
- Steam generator tool3 Sep 2024US 12,078,043 B2General Energy Recovery, Inc.
- Preventing or removing contaminants in wellbore fluid using an acoustic actuator20 Aug 2024US 12,065,897 B2Halliburton Energy Services.Inc.
- Modular heating unit2 Jul 2024US 12,025,345 B2
- Manipulation of fluids, fluid components and reactions in microfluidic systems4 Apr 2023US 11,618,024 B2Brandeis University
- Manipulation of fluids, fluid components and reactions in microfluidic systems10 Sep 2026US 2026/0264083 A1Brandeis University
- System and method for enhanced geothermal energy extraction16 Jul 2026US 2026/0201783 A1Hunt Energy, L.L.C.
- Thermoelectric Heat Recovery25 Jun 2026US 2026/0182247 A1Saudi Arabian Oil Company
- Steam generator tool19 Dec 2024US 2024/0418066 A1General Energy Recovery, Inc.
- Preventing or removing contaminants in wellbore fluid using an acoustic actuator14 Mar 2024US 2024/0084659 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Apparatus and method for the recovery of fuel products from subterranean deposits of carbonaceous matter using a plasma arc377US 4,067,390 ATechnology Application Services Corporation · 1978
- Heater well method and apparatus369US 6,056,057 AShell Oil Company · 2000
- Heat injection process368US 5,255,742 AShell Oil Company · 1993
- Heater well method and apparatus353US 6,079,499 AShell Oil Company · 2000
- Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking352US 6,328,104 B1World Energy Systems Incorporated · 2001