E21B 34/00
Valve arrangements for boreholes or wells
E21B34/00 (Valve arrangements for boreholes or wells) appears on 8,883 US grants and 8,020 published applications in this corpus.
Search patents in E21B- Granted patents
- 8,883
- Published applications
- 8,020
- Assignees
- 1,554
- Inventors
- 9,328
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 56 | 0 |
| 1977 | 57 | 0 |
| 1978 | 57 | 0 |
| 1979 | 35 | 0 |
| 1980 | 40 | 0 |
| 1981 | 81 | 0 |
| 1982 | 73 | 0 |
| 1983 | 73 | 0 |
| 1984 | 97 | 0 |
| 1985 | 72 | 0 |
| 1986 | 87 | 0 |
| 1987 | 102 | 0 |
| 1988 | 57 | 0 |
| 1989 | 82 | 0 |
| 1990 | 72 | 0 |
| 1991 | 60 | 0 |
| 1992 | 61 | 0 |
| 1993 | 75 | 0 |
| 1994 | 90 | 0 |
| 1995 | 53 | 0 |
| 1996 | 56 | 0 |
| 1997 | 26 | 0 |
| 1998 | 72 | 0 |
| 1999 | 95 | 0 |
| 2000 | 88 | 0 |
| 2001 | 131 | 41 |
| 2002 | 93 | 102 |
| 2003 | 103 | 111 |
| 2004 | 97 | 137 |
| 2005 | 73 | 95 |
| 2006 | 108 | 107 |
| 2007 | 82 | 117 |
| 2008 | 82 | 122 |
| 2009 | 89 | 203 |
| 2010 | 139 | 154 |
| 2011 | 122 | 265 |
| 2012 | 143 | 279 |
| 2013 | 210 | 375 |
| 2014 | 267 | 406 |
| 2015 | 300 | 527 |
| 2016 | 389 | 516 |
| 2017 | 426 | 491 |
| 2018 | 463 | 539 |
| 2019 | 587 | 502 |
| 2020 | 535 | 532 |
| 2021 | 524 | 533 |
| 2022 | 560 | 495 |
| 2023 | 502 | 437 |
| 2024 | 496 | 391 |
| 2025 | 398 | 339 |
| 2026 | 247 | 204 |
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.
- Inline fracturing valve systems and methods6 Oct 2026US 12,753,683 B2Cameron International Corporation
- Safety valve, well system, and method employing a temperature sensor29 Sep 2026US 12,747,648 B2Halliburton Energy Services.Inc.
- Safety valve, well system, and method employing an electrical sensor29 Sep 2026US 12,747,649 B2Halliburton Energy Services.Inc.
- Depth activated downhole adjustable bend assemblies22 Sep 2026US 12,742,360 B2National Oilwell Varco, L. P.
- Apparatus for recovering debris from a wellbore8 Oct 2026US 2026/0308994 A1Grant Prideco, L.P.
- System for delayed dissolution of downhole balls8 Oct 2026US 2026/0309002 A1Tenax Energy Systems, LLC
- Bi-directional Running Tool for Expandable Liner Hanger8 Oct 2026US 2026/0309007 A1Halliburton Energy Services.Inc.
- Methods and systems for performing hydraulic fracturing operations8 Oct 2026US 2026/0309013 A1ExxonMobil Technology and Engineering Company
- Hydraulic fracturing method using lightweight proppant particles to reduce erosion and improve conductivity8 Oct 2026US 2026/0309016 A1ExxonMobil Technology and Engineering Company
Most cited
By later US patents
- Controlling hydrocarbon production609US 10,677,035 B2Saudi Arabian Oil Company · 2020
- Downhole surge pressure reduction system and method of use340US 5,960,881 AJerry P. Allamon · 1999
- System for completing multiple well intervals336US 7,387,165 B2Schlumberger Technology Corporation · 2008
- Petroleum well having downhole sensors, communication and power268US 6,679,332 B2Shell Oil Company · 2004
- Temporary plug system266US 5,479,986 AHalliburton Company · 1996