E21B 36/005
Heater surrounding production tube
Official title: {Heater surrounding production tube}
E21B36/005 (Heater surrounding production tube) appears on 84 US grants and 84 published applications in this corpus.
Search patents in E21B- Granted patents
- 84
- Published applications
- 84
- Assignees
- 50
- Inventors
- 154
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 4 |
| 2003 | 3 | 2 |
| 2004 | 2 | 1 |
| 2005 | 2 | 4 |
| 2006 | 3 | 2 |
| 2007 | 1 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 3 |
| 2011 | 0 | 0 |
| 2012 | 2 | 4 |
| 2013 | 1 | 6 |
| 2014 | 2 | 6 |
| 2015 | 3 | 4 |
| 2016 | 6 | 3 |
| 2017 | 2 | 7 |
| 2018 | 3 | 7 |
| 2019 | 10 | 5 |
| 2020 | 5 | 2 |
| 2021 | 4 | 5 |
| 2022 | 3 | 5 |
| 2023 | 3 | 6 |
| 2024 | 8 | 3 |
| 2025 | 4 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Subsea induction heating system and related method16 Jun 2026US 12,655,720 B2
- Subsea heat bank with PCM heat storing member14 Apr 2026US 12,601,241 B2Baker Hughes Energy Technology UK Limited
- Heat treating tubulars15 Jul 2025US 12,359,537 B2Saudi Arabian Oil Company
- Fluid injection system and related methods27 May 2025US 12,312,892 B2Horisont Energi AS
- Methods for installing risers in a fluid injection system27 May 2025US 12,312,893 B2Horisont Energi AS
- Subsea heat bank with pcm heat storing member1 May 2025US 2025/0137354 A1Baker Hughes Energy Technology UK Limited
- Process of improving heavy oil recovery using a combination of downhole heater system, and chemical formulation composed of solvents and surfactants27 Mar 2025US 2025/0101293 A1Saudi Arabian Oil Company
- Methods for installing risers in a fluid injection system7 Nov 2024US 2024/0368947 A1Horisont Energi AS
- Heat treating tubulars20 Jun 2024US 2024/0200424 A1Saudi Arabian Oil Company
- Fluid injection system and related methods16 May 2024US 2024/0159117 A1Horisont Energi AS
Most cited
By later US patents
- System for recovering viscous petroleum from thick tar sand305US 4,019,575 AChevron Research Company · 1977
- Thermal mineral extraction system294US 5,285,846 AFramo Developments (UK) Limited · 1994
- Method and apparatus for producing viscous or waxy crude oils173US 4,446,917 A1984
- Wellhead heating apparatus and method98US 6,776,227 B22004
- Method of forming and servicing wellbores from a main wellbore63US 6,279,658 B1Baker Hughes Incorporated · 2001