E21B 43/305
Comprising at least one inclined or horizontal well
Official title: {comprising at least one inclined or horizontal well}
E21B43/305 (Comprising at least one inclined or horizontal well) appears on 895 US grants and 711 published applications in this corpus.
Search patents in E21B- Granted patents
- 895
- Published applications
- 711
- Assignees
- 311
- Inventors
- 1,515
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 9 | 0 |
| 1978 | 13 | 0 |
| 1979 | 5 | 0 |
| 1980 | 10 | 0 |
| 1981 | 16 | 0 |
| 1982 | 4 | 0 |
| 1983 | 19 | 0 |
| 1984 | 27 | 0 |
| 1985 | 11 | 0 |
| 1986 | 14 | 0 |
| 1987 | 18 | 0 |
| 1988 | 8 | 0 |
| 1989 | 12 | 0 |
| 1990 | 5 | 0 |
| 1991 | 10 | 0 |
| 1992 | 14 | 0 |
| 1993 | 17 | 0 |
| 1994 | 10 | 0 |
| 1995 | 16 | 0 |
| 1996 | 9 | 0 |
| 1997 | 10 | 0 |
| 1998 | 14 | 0 |
| 1999 | 12 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 9 |
| 2002 | 15 | 23 |
| 2003 | 17 | 39 |
| 2004 | 18 | 28 |
| 2005 | 13 | 33 |
| 2006 | 43 | 19 |
| 2007 | 27 | 19 |
| 2008 | 16 | 26 |
| 2009 | 11 | 32 |
| 2010 | 17 | 29 |
| 2011 | 8 | 29 |
| 2012 | 33 | 26 |
| 2013 | 19 | 39 |
| 2014 | 26 | 32 |
| 2015 | 26 | 37 |
| 2016 | 23 | 33 |
| 2017 | 24 | 35 |
| 2018 | 26 | 33 |
| 2019 | 40 | 25 |
| 2020 | 31 | 38 |
| 2021 | 36 | 35 |
| 2022 | 24 | 18 |
| 2023 | 24 | 18 |
| 2024 | 25 | 24 |
| 2025 | 21 | 20 |
| 2026 | 19 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Well location optimizer for high inclination complex well trajectories16 Jun 2026US 12,655,689 B2Saudi Arabian Oil Company
- Systems and methods for analytic mapping of the metageomic and hydrocarbon footprints of geologic subzones9 Jun 2026US 12,650,067 B2Chevron U.S.A.Inc.
- System and methods for determining the effect of fracture interference on shale well performance19 May 2026US 12,631,099 B2King Fahd University of Petroleum and Minerals
- Manipulation of fluids, fluid components and reactions in microfluidic systems10 Sep 2026US 2026/0264083 A1Brandeis University
- Wellbore controllable chamber-forming granular-flow mining system6 Aug 2026US 2026/0226817 A1Blueland Technology Limited
- Methods and systems for well spacing30 Jul 2026US 2026/0218595 A1Helmerich & Payne Technologies, LLC
- Method for synergistic permeability enhancement and extraction of coal mine gas23 Jul 2026US 2026/0210224 A1Chongqing University
- System and method for enhanced geothermal energy extraction16 Jul 2026US 2026/0201783 A1Hunt Energy, L.L.C.
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
- Method of treating reservoirs containing very viscous crude oil or bitumen411US 4,390,067 AExxon Production Research Company · 1983
- Method and apparatus for improved recovery of oil from porous, subsurface deposits (targevcir oricess)410US 5,217,076 A1993