E21B 43/2405
In association with fracturing or crevice forming processes
Official title: {in association with fracturing or crevice forming processes (E21B43/247 takes precedence)}
E21B43/2405 (In association with fracturing or crevice forming processes) appears on 229 US grants and 218 published applications in this corpus.
Search patents in E21B- Granted patents
- 229
- Published applications
- 218
- Assignees
- 88
- Inventors
- 425
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 10 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 10 |
| 2006 | 0 | 3 |
| 2007 | 0 | 11 |
| 2008 | 10 | 4 |
| 2009 | 6 | 8 |
| 2010 | 3 | 19 |
| 2011 | 1 | 3 |
| 2012 | 9 | 2 |
| 2013 | 7 | 14 |
| 2014 | 4 | 8 |
| 2015 | 7 | 14 |
| 2016 | 8 | 26 |
| 2017 | 18 | 13 |
| 2018 | 15 | 13 |
| 2019 | 10 | 10 |
| 2020 | 13 | 14 |
| 2021 | 13 | 8 |
| 2022 | 9 | 7 |
| 2023 | 10 | 13 |
| 2024 | 6 | 3 |
| 2025 | 6 | 7 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Boosting well performance in geothermal systems15 Sep 2026US 12,735,966 B2Schlumberger Technology Corporation
- Extraction and integration of waste heat from enhanced geologic hydrogen production25 Aug 2026US 12,716,339 B2Koloma, Inc.
- Methods of forming and maintaining conductive propped fractures in SAGD and geothermal well applications28 Jul 2026US 12,692,777 B2Halliburton Energy Services.Inc.
- Methods and systems for increasing heat transfer in geothermal systems28 Jul 2026US 12,693,046 B2GreenFire Energy Inc.
- Hydrogen production, storage and recovery16 Jun 2026US 12,655,725 B2TerraH2 LLC
- Extraction and integration of waste heat from enhanced geologic hydrogen production13 Aug 2026US 2026/0235020 A1Koloma, Inc.
- Method for synergistic permeability enhancement and extraction of coal mine gas23 Jul 2026US 2026/0210224 A1Chongqing University
- Energized Connectivity Completions Technology25 Jun 2026US 2026/0176941 A1
- Methods of forming and maintaining conductive propped fractures in sagd and geothermal well applications28 May 2026US 2026/0146523 A1Halliburton Energy Services.Inc.
- Hydrogen production and sulfur-carbon sequestration23 Apr 2026US 2026/0110234 A1Koloma, Inc.
Most cited
By later US patents
- Conductively heating a subterranean oil shale to create permeability and subsequently produce oil437US 4,886,118 AShell Oil Company · 1989
- Oil recovery process345US 5,297,626 AShell Oil Company · 1994
- Oil recovery process340US 5,392,854 AShell Oil Company · 1995
- Method for producing low permeability reservoirs using steam291US 5,415,231 AMobil Oil Corporation · 1995
- In-situ recovery of viscous hydrocarbonaceous crude oil290US 4,501,326 AGulf Canada Limited · 1985