E21B 43/2605
Using gas or liquefied gas
Official title: {using gas or liquefied gas}
E21B43/2605 (Using gas or liquefied gas) appears on 335 US grants and 317 published applications in this corpus.
Search patents in E21B- Granted patents
- 335
- Published applications
- 317
- Assignees
- 155
- Inventors
- 640
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 10 | 0 |
| 1996 | 6 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 2 |
| 2004 | 0 | 2 |
| 2005 | 3 | 5 |
| 2006 | 4 | 5 |
| 2007 | 3 | 16 |
| 2008 | 2 | 5 |
| 2009 | 7 | 10 |
| 2010 | 8 | 7 |
| 2011 | 9 | 5 |
| 2012 | 2 | 5 |
| 2013 | 7 | 14 |
| 2014 | 5 | 22 |
| 2015 | 9 | 25 |
| 2016 | 16 | 29 |
| 2017 | 22 | 17 |
| 2018 | 17 | 12 |
| 2019 | 20 | 31 |
| 2020 | 27 | 19 |
| 2021 | 25 | 23 |
| 2022 | 19 | 18 |
| 2023 | 19 | 13 |
| 2024 | 14 | 9 |
| 2025 | 10 | 17 |
| 2026 | 7 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Foamed fracturing fluid with scale protection1 Sep 2026US 12,723,189 B1Halliburton Energy Services.Inc.
- Contingency for surface controlled gas lift valve21 Jul 2026US 12,687,091 B2Silverwell Technology Limited
- Hydrogen production, storage and recovery16 Jun 2026US 12,655,725 B2TerraH2 LLC
- Enhanced gas extraction system and method based on dual-pulsation and acid fracturing permeability enhancement for low-permeability coal seam9 Jun 2026US 12,650,060 B2Chongqing University
- Hydrogen production from iron-rich formations17 Mar 2026US 12,577,865 B1Saudi Arabian Oil Company
- Enhanced solvent recovery from tight rock and shale oil wells30 Jul 2026US 2026/0218594 A1Oil Technology Group LLC
- Apparatus for selectively isolating segments of a wellbore23 Jul 2026US 2026/0210208 A1Drift Wellbore Technologies Ltd.
- Enhanced gas extraction system and method based on dual-pulsation and acid fracturing permeability enhancement for low-permeability coal seam23 Apr 2026US 2026/0110236 A1Chongqing University
- In-Hole Vaporization of Liquid Gas for Well Stimulation26 Feb 2026US 2026/0055690 A1CTLift Systems LLC
- Carbon dioxide storagetarget reservoirmodifiedfracture characterization and permeability-increasing effect evaluation method18 Dec 2025US 2025/0383463 A1China University of Mining and Technology
Most cited
By later US patents
- Mobile, modular, electrically powered system for use in fracturing underground formations using liquid petroleum gas341US 9,140,110 B2Evolution Well Services, LLC · 2015
- In situ solution mining of coal285US 3,973,628 ANew Mexico Tech Research Foundation · 1976
- Method and apparatus for stimulation of multiple formation intervals249US 6,394,184 B2ExxonMobil Upstream Research Company · 2002
- Electric blender system, apparatus and method for use in fracturing underground formations using liquid petroleum gas225US 10,107,085 B2Evolution Well Services, LLC · 2018
- System and method for dedicated electric source for use in fracturing underground formations using liquid petroleum gas223US 10,107,084 B2Evolution Well Services, LLC · 2018