E21B 43/168
Injecting a gaseous medium
Official title: {Injecting a gaseous medium}
E21B43/168 (Injecting a gaseous medium) appears on 363 US grants and 387 published applications in this corpus.
Search patents in E21B- Granted patents
- 363
- Published applications
- 387
- Assignees
- 194
- Inventors
- 842
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 18 |
| 2004 | 1 | 7 |
| 2005 | 2 | 4 |
| 2006 | 12 | 11 |
| 2007 | 3 | 7 |
| 2008 | 7 | 7 |
| 2009 | 7 | 10 |
| 2010 | 9 | 14 |
| 2011 | 5 | 10 |
| 2012 | 8 | 14 |
| 2013 | 9 | 17 |
| 2014 | 12 | 20 |
| 2015 | 13 | 30 |
| 2016 | 12 | 16 |
| 2017 | 11 | 29 |
| 2018 | 23 | 23 |
| 2019 | 29 | 35 |
| 2020 | 27 | 19 |
| 2021 | 24 | 21 |
| 2022 | 13 | 15 |
| 2023 | 17 | 17 |
| 2024 | 18 | 14 |
| 2025 | 10 | 18 |
| 2026 | 10 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Enhanced solvent recovery from tight rock and shale oil wells15 Sep 2026US 12,735,965 B2Oil Technology Group LLC
- Subterranean capture of produced gas lost in gas enhanced hydrocarbon recovery25 Aug 2026US 12,716,337 B2ExxonMobil Technology and Engineering Company
- Gas injection method and system for deep strong bottom water sandstone reservoir25 Aug 2026US 12,716,338 B2China Petroleum & Chemical Corporation
- Geological hydrogen productivity evaluation system7 Jul 2026US 12,674,909 B2Pukyong National University Industry-University Cooperation Foundation
- Top drive method and system for oil production30 Jun 2026US 12,669,043 B1
- Method for optimization of huff-n-puff gas injection in hydrocarbon reservoirs1 Oct 2026US 2026/0298060 A1Texas Tech University System
- Lateral gas lift with slugging control10 Sep 2026US 2026/0266165 A1ConocoPhillips Company
- Enhanced solvent recovery from tight rock and shale oil wells30 Jul 2026US 2026/0218594 A1Oil Technology Group LLC
- Methods, systems, and compositions for in-situ foam generation for liquid unloading23 Jul 2026US 2026/0209595 A1Saudi Arabian Oil Company
- Asynchronous cycle-based oil extraction apparatus, method and system18 Jun 2026US 2026/0168365 A1China Petroleum & Chemical Corporation
Most cited
By later US patents
- Heavy oil recovery process320US 4,706,751 AS-Cal Research Corp. · 1987
- Enhanced recoveries of petroleum and hydrogen from underground reservoirs310US 4,183,405 A1980
- Recovery of oil from oil-bearing formation by continually flowing pressurized heated gas through channel alongside matrix304US 4,856,587 A1989
- Method for treating a mixture of gaseous fluids within a solid carbonaceous subterranean formation299US 5,439,054 AAmoco Corporation · 1995
- Method for disposing of unwanted gaseous fluid components within a solid carbonaceous subterranean formation296US 5,454,666 AAmoco Corporation · 1995