E21B 43/123
Gas lift valves
Official title: {Gas lift valves}
E21B43/123 (Gas lift valves) appears on 371 US grants and 353 published applications in this corpus.
Search patents in E21B- Granted patents
- 371
- Published applications
- 353
- Assignees
- 137
- Inventors
- 638
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 9 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 9 | 4 |
| 2002 | 3 | 10 |
| 2003 | 6 | 9 |
| 2004 | 7 | 8 |
| 2005 | 5 | 2 |
| 2006 | 6 | 3 |
| 2007 | 2 | 6 |
| 2008 | 6 | 5 |
| 2009 | 1 | 11 |
| 2010 | 7 | 10 |
| 2011 | 4 | 10 |
| 2012 | 8 | 11 |
| 2013 | 4 | 9 |
| 2014 | 11 | 14 |
| 2015 | 4 | 13 |
| 2016 | 15 | 12 |
| 2017 | 10 | 14 |
| 2018 | 8 | 7 |
| 2019 | 8 | 12 |
| 2020 | 16 | 28 |
| 2021 | 14 | 25 |
| 2022 | 22 | 26 |
| 2023 | 32 | 21 |
| 2024 | 27 | 32 |
| 2025 | 28 | 31 |
| 2026 | 24 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modified gas assisted plunger lift6 Oct 2026US 12,753,684 B2Silverwell Technology Limited
- Gas lift valve having ratcheting orifice15 Sep 2026US 12,735,963 B1Weatherford Technology Holdings, LLC
- Venturi controlled unloading valve for gas lift system1 Sep 2026US 12,723,498 B2Baker Hughes Oilfield Operations LLC
- Gas lift valve11 Aug 2026US 12,704,051 B2Devon Energy Corporation
- Gas lift mandrel11 Aug 2026US 12,704,052 B1
- Well analysis applications for oil and natural gas wells with intermittent flows1 Oct 2026US 2026/0298055 A1Yottek Corp.
- Gas Lift Valve Having Ratcheting Orifice1 Oct 2026US 2026/0298056 A1Weatherford Technology Holdings, LLC
- Unibody bypass plunger and valve cage24 Sep 2026US 2026/0286816 A1Flowco MasterCo LLC
- Valve system for use in a wellbore17 Sep 2026US 2026/0275828 A1Interwell Norway AS
- Gas Lift Valve Having Ratcheting Orifice17 Sep 2026US 2026/0275837 A1Weatherford Technology Holdings, LLC
Most cited
By later US patents
- Petroleum well having downhole sensors, communication and power268US 6,679,332 B2Shell Oil Company · 2004
- Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters221US 6,958,704 B2Shell Oil Company · 2005
- Controllable gas-lift well and valve202US 6,715,550 B2Shell Oil Company · 2004
- Controlled downhole chemical injection178US 6,981,553 B2Shell Oil Company · 2006
- Use of downhole high pressure gas in a gas-lift well and associated methods174US 7,147,059 B2Shell Oil Company · 2006