E21B 34/08
Responsive to flow or pressure of the fluid obtained
Official title: responsive to flow or pressure of the fluid obtained (E21B34/10 takes precedence)
E21B34/08 (Responsive to flow or pressure of the fluid obtained) appears on 1,029 US grants and 1,051 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,029
- Published applications
- 1,051
- Assignees
- 300
- Inventors
- 1,524
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 11 | 2 |
| 2002 | 6 | 12 |
| 2003 | 6 | 13 |
| 2004 | 10 | 12 |
| 2005 | 10 | 10 |
| 2006 | 11 | 13 |
| 2007 | 11 | 15 |
| 2008 | 9 | 13 |
| 2009 | 8 | 30 |
| 2010 | 16 | 14 |
| 2011 | 12 | 32 |
| 2012 | 12 | 40 |
| 2013 | 34 | 60 |
| 2014 | 39 | 61 |
| 2015 | 44 | 59 |
| 2016 | 62 | 52 |
| 2017 | 51 | 55 |
| 2018 | 57 | 62 |
| 2019 | 68 | 66 |
| 2020 | 64 | 80 |
| 2021 | 76 | 84 |
| 2022 | 94 | 82 |
| 2023 | 78 | 57 |
| 2024 | 57 | 49 |
| 2025 | 49 | 49 |
| 2026 | 35 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flow control system having a rate limiting device for well systems6 Oct 2026US 12,753,673 B2Halliburton Energy Services.Inc.
- Actuation cylinder for inside blow-out preventer valve22 Sep 2026US 12,742,367 B2Patterson-UTI Drilling Company LLC
- Hydrostatically insensitive valve assembly8 Sep 2026US 12,729,602 B2Weatherford Technology Holdings, LLC
- Flow control devices for brine production from wellbore8 Sep 2026US 12,729,610 B2Halliburton Energy Services.Inc.
- Fuel, communications, and power connection systems and related methods1 Sep 2026US 12,723,942 B2BJ Energy Solutions, LLC
- Fuel, communications, and power connection systems and related methods8 Oct 2026US 2026/0309574 A1BJ Energy Solutions, LLC
- Configurable programmable check valve for well operations1 Oct 2026US 2026/0298049 A1Saudi Arabian Oil Company
- Unibody bypass plunger and valve cage24 Sep 2026US 2026/0286816 A1Flowco MasterCo LLC
- Safety valve employing radially coupled magnetic targets and a magnetic assembly axially coupled to a magnetic target17 Sep 2026US 2026/0275829 A1Halliburton Energy Services.Inc.
- Downhole valve10 Sep 2026US 2026/0266159 A1
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
- Sand screen with active flow control and associated method of use180US 6,622,794 B2Baker Hughes Incorporated · 2003
- Controlled downhole chemical injection178US 6,981,553 B2Shell Oil Company · 2006