E21B 43/20
Displacing by water
E21B43/20 (Displacing by water) appears on 695 US grants and 729 published applications in this corpus.
Search patents in E21B- Granted patents
- 695
- Published applications
- 729
- Assignees
- 278
- Inventors
- 1,657
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 10 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 9 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 11 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 11 | 4 |
| 2002 | 2 | 3 |
| 2003 | 4 | 6 |
| 2004 | 3 | 6 |
| 2005 | 8 | 4 |
| 2006 | 2 | 7 |
| 2007 | 5 | 9 |
| 2008 | 5 | 7 |
| 2009 | 2 | 18 |
| 2010 | 9 | 13 |
| 2011 | 8 | 11 |
| 2012 | 8 | 34 |
| 2013 | 17 | 30 |
| 2014 | 21 | 22 |
| 2015 | 13 | 35 |
| 2016 | 25 | 64 |
| 2017 | 26 | 68 |
| 2018 | 52 | 61 |
| 2019 | 69 | 50 |
| 2020 | 67 | 62 |
| 2021 | 61 | 55 |
| 2022 | 44 | 48 |
| 2023 | 47 | 44 |
| 2024 | 43 | 36 |
| 2025 | 34 | 24 |
| 2026 | 11 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Waterflooding system and process to prevent scale precipitation in oil fields6 Oct 2026US 12,753,685 B2Saudi Arabian Oil Company
- Electrical stimulation of hydrogen-producing rocks and reservoirs1 Sep 2026US 12,723,499 B2Eden GeoPower, Inc.
- Automatic calibration for a water injection network model4 Aug 2026US 12,699,814 B2Saudi Arabian Oil Company
- Method and system to create a tortuous flow path28 Jul 2026US 12,692,771 B2Schlumberger Technology Corporation
- High molecular weight anionic polyacrylamides19 May 2026US 12,630,703 B2Snf Group
- Method and system to create a tortuous flow path23 Jul 2026US 2026/0210217 A1Schlumberger Technology Corporation
- Autonomous oilfield production integrated control system23 Jul 2026US 2026/0210219 A1Schlumberger Technology Corporation
- Machine learning enabled water flooding optimization23 Jul 2026US 2026/0210223 A1Schlumberger Technology Corporation
- Microemulsion compositions for enhanced acidizing of oil and gas wells2 Jul 2026US 2026/0184984 A1Locus Solutions Ipco, LLC
- Method for maximizing water injection and ensuring the integrity of an oil reservoir, and computer-readable storage medium2 Jul 2026US 2026/0185421 A1
Most cited
By later US patents
- Controlling hydrocarbon production609US 10,677,035 B2Saudi Arabian Oil Company · 2020
- Systems and methods for electromagnetic waterfront surveillance in a vicinity of an oil well347US 11,035,972 B2Saudi Arabian Oil Company · 2021
- Method for producing low permeability reservoirs using a single well254US 5,377,756 AMobil Oil Corporation · 1995
- Monitoring of downhole parameters and tools utilizing fiber optics244US 6,281,489 B1Baker Hughes Incorporated · 2001
- Monitoring of downhole parameters and tools utilizing fiber optics241US 6,588,266 B2Baker Hughes Incorporated · 2003