E21B 43/1185
Ignition systems
E21B43/1185 (Ignition systems) appears on 849 US grants and 694 published applications in this corpus.
Search patents in E21B- Granted patents
- 849
- Published applications
- 694
- Assignees
- 163
- Inventors
- 899
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 7 | 0 |
| 1985 | 17 | 0 |
| 1986 | 20 | 0 |
| 1987 | 21 | 0 |
| 1988 | 12 | 0 |
| 1989 | 10 | 0 |
| 1990 | 10 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 7 | 0 |
| 1994 | 12 | 0 |
| 1995 | 9 | 0 |
| 1996 | 12 | 0 |
| 1997 | 9 | 0 |
| 1998 | 6 | 0 |
| 1999 | 9 | 0 |
| 2000 | 14 | 0 |
| 2001 | 5 | 3 |
| 2002 | 12 | 8 |
| 2003 | 7 | 12 |
| 2004 | 7 | 9 |
| 2005 | 6 | 8 |
| 2006 | 5 | 6 |
| 2007 | 4 | 8 |
| 2008 | 9 | 10 |
| 2009 | 8 | 9 |
| 2010 | 6 | 13 |
| 2011 | 13 | 8 |
| 2012 | 7 | 22 |
| 2013 | 10 | 15 |
| 2014 | 13 | 20 |
| 2015 | 20 | 32 |
| 2016 | 22 | 25 |
| 2017 | 31 | 33 |
| 2018 | 21 | 30 |
| 2019 | 37 | 59 |
| 2020 | 39 | 51 |
| 2021 | 54 | 73 |
| 2022 | 64 | 63 |
| 2023 | 55 | 45 |
| 2024 | 55 | 63 |
| 2025 | 75 | 50 |
| 2026 | 35 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Perforating gun and ballistic interrupter for same6 Oct 2026US 12,753,681 B2Oso Perforating, LLC
- Downhole perforating gun tube and components29 Sep 2026US 12,747,656 B1SWM International, LLC
- Multi-stage perforating22 Sep 2026US 12,742,371 B1Saudi Arabian Oil Company
- Electronic device and method for orientation-measuring device for downhole perforations22 Sep 2026US 12,742,372 B2Advanced Wireline Solutions, Inc.
- Perforating gun assembly with performance optimized shaped charge load1 Sep 2026US 12,723,494 B2DynaEnergetics Europe GmbH
- Disposable perforation tool8 Oct 2026US 2026/0309008 A1Schlumberger Technology Corporation
- Fixed-Volume Setting Tool24 Sep 2026US 2026/0286798 A1DBK Industries, LLC
- Switch module for wellbore perforating gun24 Sep 2026US 2026/0286815 A1G&H Diversified Manufacturing LP
- Perforation system and method17 Sep 2026US 2026/0275834 A1Baker Hughes Oilfield Operations LLC
- Fully automated perforating gun17 Sep 2026US 2026/0275835 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Method and apparatus for providing controlled force transference to a wellbore tool200US 5,343,963 A1994
- Heat activated safety fuse188US 5,392,860 ABaker Hughes Incorporated · 1995
- Apparatus for selectively actuating well tools168US 5,052,489 A1991
- Safe arm system for a perforating apparatus having a transport mode an electric contact mode and an armed mode166US 5,027,708 ASchlumberger Technology Corporation · 1991
- Perforating gun and detonator assembly164US 9,581,422 B2DynaEnergetics GmbH & Co. KG · 2017