E21B 43/2406
Steam assisted gravity drainage [sagd]
Official title: {Steam assisted gravity drainage [SAGD]}
E21B43/2406 (Steam assisted gravity drainage [sagd]) appears on 631 US grants and 782 published applications in this corpus.
Search patents in E21B- Granted patents
- 631
- Published applications
- 782
- Assignees
- 227
- Inventors
- 1,094
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 0 |
| 2003 | 3 | 7 |
| 2004 | 2 | 0 |
| 2005 | 1 | 6 |
| 2006 | 8 | 7 |
| 2007 | 2 | 9 |
| 2008 | 7 | 9 |
| 2009 | 5 | 22 |
| 2010 | 9 | 30 |
| 2011 | 11 | 42 |
| 2012 | 18 | 41 |
| 2013 | 30 | 59 |
| 2014 | 36 | 93 |
| 2015 | 35 | 82 |
| 2016 | 41 | 71 |
| 2017 | 56 | 56 |
| 2018 | 56 | 60 |
| 2019 | 68 | 54 |
| 2020 | 63 | 29 |
| 2021 | 48 | 32 |
| 2022 | 26 | 26 |
| 2023 | 35 | 20 |
| 2024 | 23 | 14 |
| 2025 | 11 | 6 |
| 2026 | 8 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for independent control and operations of tubing and annulus at the wellhead for steam injection4 Aug 2026US 12,698,697 B1Chevron U.S.A.Inc.
- Methods of forming and maintaining conductive propped fractures in SAGD and geothermal well applications28 Jul 2026US 12,692,777 B2Halliburton Energy Services.Inc.
- Tubular for downhole use2 Jun 2026US 12,644,367 B2Pro-Pipe Service & Sales Ltd.
- Microbially enhanced thermal oil recovery26 May 2026US 12,637,932 B29668241 Canada Inc.
- Heat harvesting of end-of-life wells10 Mar 2026US 12,571,377 B2ConocoPhillips Company
- Microbially enhanced thermal oil recovery3 Sep 2026US 2026/0258720 A19668241 Canada Inc.
- System and method for enhanced geothermal energy extraction16 Jul 2026US 2026/0201783 A1Hunt Energy, L.L.C.
- E-methanol sagd plant system applicable to unconventional oil production areas2 Jul 2026US 2026/0185431 A1Koms Inc.
- Methods of forming and maintaining conductive propped fractures in sagd and geothermal well applications28 May 2026US 2026/0146523 A1Halliburton Energy Services.Inc.
- Steam diverter apparatus and expansion joint14 May 2026US 2026/0132705 A1Tier 1 Energy Solutions, Inc.
Most cited
By later US patents
- Insulated and/or concentric coiled tubing429US 6,015,015 ABJ Services Company, U.S.A. · 2000
- Method and apparatus for producing hydrocarbon bearing deposits in formations having shale layers360US 5,046,559 AShell Oil Company · 1991
- In situ thermal processing of a tar sands formation266US 7,066,254 B2Shell Oil Company · 2006
- Steam-assisted gravity drainage heavy oil recovery process206US 6,257,334 B1Alberta Oil Sands Technology and Research Authority · 2001
- Method for continuously producing viscous hydrocarbons by gravity drainage while injecting heated fluids205US 4,344,485 AExxon Production Research Company · 1982