E21B 43/1235
Characterised by electromagnetic actuation
Official title: {characterised by electromagnetic actuation}
E21B43/1235 (Characterised by electromagnetic actuation) appears on 31 US grants and 20 published applications in this corpus.
Search patents in E21B- Granted patents
- 31
- Published applications
- 20
- Assignees
- 13
- Inventors
- 54
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 0 | 4 |
| 2003 | 2 | 2 |
| 2004 | 1 | 3 |
| 2005 | 2 | 0 |
| 2006 | 2 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 3 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Single actuated rotational electric gas lift valve9 Sep 2025US 12,410,693 B2Schlumberger Technology Corporation
- Electrical gas lift valves and assemblies22 Jul 2025US 12,366,147 B2Schlumberger Technology Corporation
- Downhole control arrangement, valve arrangement, side pocket mandrel, and method for operating a downhole valve arrangement12 Nov 2024US 12,139,998 B2Petroleum Technology Company AS
- Wellbore system having an annulus safety valve18 Jul 2023US 11,702,913 B2Silverwell Technology Limited
- Method and apparatus for producing well with backup gas lift and an electrical submersible well pump8 Feb 2022US 11,242,733 B2Baker Hughes Oilfield Operations LLC
- Electric gas lift valve18 Jul 2024US 2024/0240544 A1Schlumberger Technology Corporation
- Single actuated rotational electric gas lift valve11 Jul 2024US 2024/0229622 A1Schlumberger Technology Corporation
- Electrical gas lift valves and assemblies15 Feb 2024US 2024/0052730 A1Schlumberger Technology Corporation
- Downhole control arrangement, valve arrangement, side pocket mandrel, and method for operating a downhole valve arrangement13 Apr 2023US 2023/0116200 A1Petroleum Technology Company AS
- Wellbore system having an annulus safety valve20 Oct 2022US 2022/0333469 A1Silverwell Technology Limited
Most cited
By later US patents
- Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters221US 6,958,704 B2Shell Oil Company · 2005
- Production wells having permanent downhole formation evaluation sensors163US 5,730,219 ABaker Hughes Incorporated · 1998
- Well control system130US 5,172,717 AOtis Engineering Corporation · 1992
- Flow control valve system113US 5,176,164 AOtis Engineering Corporation · 1993
- Variable orifice gas lift valve for high flow rates with detachable power source and method of using78US 6,070,608 ACamco International Inc. · 2000