E21B 43/30
Specific pattern of wells
Official title: Specific pattern of wells, e.g. optimising the spacing of wells
E21B43/30 (Specific pattern of wells) appears on 1,402 US grants and 1,143 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,402
- Published applications
- 1,143
- Assignees
- 424
- Inventors
- 2,404
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 13 | 0 |
| 1978 | 23 | 0 |
| 1979 | 15 | 0 |
| 1980 | 16 | 0 |
| 1981 | 28 | 0 |
| 1982 | 9 | 0 |
| 1983 | 27 | 0 |
| 1984 | 42 | 0 |
| 1985 | 22 | 0 |
| 1986 | 23 | 0 |
| 1987 | 35 | 0 |
| 1988 | 16 | 0 |
| 1989 | 17 | 0 |
| 1990 | 8 | 0 |
| 1991 | 21 | 0 |
| 1992 | 19 | 0 |
| 1993 | 27 | 0 |
| 1994 | 20 | 0 |
| 1995 | 20 | 0 |
| 1996 | 12 | 0 |
| 1997 | 13 | 0 |
| 1998 | 14 | 0 |
| 1999 | 18 | 0 |
| 2000 | 12 | 0 |
| 2001 | 19 | 9 |
| 2002 | 15 | 97 |
| 2003 | 27 | 82 |
| 2004 | 67 | 37 |
| 2005 | 37 | 35 |
| 2006 | 71 | 23 |
| 2007 | 31 | 26 |
| 2008 | 17 | 48 |
| 2009 | 20 | 54 |
| 2010 | 34 | 39 |
| 2011 | 17 | 44 |
| 2012 | 50 | 37 |
| 2013 | 31 | 55 |
| 2014 | 35 | 51 |
| 2015 | 36 | 53 |
| 2016 | 31 | 49 |
| 2017 | 32 | 44 |
| 2018 | 37 | 53 |
| 2019 | 56 | 36 |
| 2020 | 44 | 51 |
| 2021 | 48 | 52 |
| 2022 | 30 | 35 |
| 2023 | 38 | 29 |
| 2024 | 36 | 45 |
| 2025 | 33 | 32 |
| 2026 | 25 | 27 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Well pattern arrangement method for in-situ leaching of low-permeability sandstone-type uranium deposit15 Sep 2026US 12,735,970 B1Shijiazhuang Tiedao University
- Subterranean capture of produced gas lost in gas enhanced hydrocarbon recovery25 Aug 2026US 12,716,337 B2ExxonMobil Technology and Engineering Company
- Method for determining the heat in place for a geothermal system with horizontal wells25 Aug 2026US 12,717,064 B2Fervo Energy Company
- Characterizing geologic areas based on comparative compositional analysis23 Jun 2026US 12,662,919 B2Advanced Hydrocarbon Stratigraphy, Inc.
- Well location optimizer for high inclination complex well trajectories16 Jun 2026US 12,655,689 B2Saudi Arabian Oil Company
- Manipulation of fluids, fluid components and reactions in microfluidic systems10 Sep 2026US 2026/0264083 A1Brandeis University
- Systems and methods for optimizing injection wells3 Sep 2026US 2026/0258721 A1ConocoPhillips Company
- Process for positioning or predicting flow in at least a fluid production well and/or at least a fluid injection well in a field, related electronic system and computer program product27 Aug 2026US 2026/0251045 A1Totalenergies Onetech
- Process for storing and exploiting a first gas and a second gas denser than the first gas in an aquifer or depleted reservoir27 Aug 2026US 2026/0251265 A1Storengy
- Wellbore trajectory determination20 Aug 2026US 2026/0243158 A1BP Corporation North America Inc.
Most cited
By later US patents
- In-situ tuned microwave oil extraction process483US 5,082,054 A1992
- Method for in situ heat processing of hydrocarbonaceous formations474US 4,140,180 AIIT Research Institute · 1979
- Apparatus and method for in situ heat processing of hydrocarbonaceous formations456US 4,144,935 AIIT Research Institute · 1979
- Balanced-line RF electrode system for use in RF ground heating to recover oil from oil shale443US 5,236,039 AGeneral Electric Company · 1993
- Conductively heating a subterranean oil shale to create permeability and subsequently produce oil437US 4,886,118 AShell Oil Company · 1989