E21B 43/122
Gas lift
Official title: {Gas lift}
E21B43/122 (Gas lift) appears on 696 US grants and 638 published applications in this corpus.
Search patents in E21B- Granted patents
- 696
- Published applications
- 638
- Assignees
- 263
- Inventors
- 1,225
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 8 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 12 | 0 |
| 1994 | 3 | 0 |
| 1995 | 15 | 0 |
| 1996 | 10 | 0 |
| 1997 | 3 | 0 |
| 1998 | 6 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 15 | 4 |
| 2002 | 7 | 15 |
| 2003 | 15 | 16 |
| 2004 | 11 | 14 |
| 2005 | 6 | 18 |
| 2006 | 12 | 14 |
| 2007 | 7 | 17 |
| 2008 | 19 | 12 |
| 2009 | 10 | 16 |
| 2010 | 11 | 17 |
| 2011 | 9 | 22 |
| 2012 | 14 | 17 |
| 2013 | 9 | 19 |
| 2014 | 17 | 24 |
| 2015 | 16 | 23 |
| 2016 | 23 | 21 |
| 2017 | 12 | 21 |
| 2018 | 16 | 21 |
| 2019 | 19 | 21 |
| 2020 | 36 | 46 |
| 2021 | 29 | 46 |
| 2022 | 40 | 46 |
| 2023 | 56 | 41 |
| 2024 | 46 | 51 |
| 2025 | 48 | 43 |
| 2026 | 36 | 33 |
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
- Automated method for optimizing adjustment factors of flow models15 Sep 2026US 12,736,712 B2Petroleo Brasileiro S.A. - Petrobras
- 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
- 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
- Well control systems employing downhole network334US 5,959,547 ABaker Hughes Incorporated · 1999
- 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
- Enhanced lift method and apparatus for the production of hydrocarbons204US 6,039,121 ARangewest Technologies Ltd. · 2000
- Controllable gas-lift well and valve202US 6,715,550 B2Shell Oil Company · 2004