E21B 43/116
Gun or shaped-charge perforators
E21B43/116 (Gun or shaped-charge perforators) appears on 1,830 US grants and 1,545 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,830
- Published applications
- 1,545
- Assignees
- 317
- Inventors
- 1,894
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 9 | 0 |
| 1982 | 8 | 0 |
| 1983 | 8 | 0 |
| 1984 | 11 | 0 |
| 1985 | 34 | 0 |
| 1986 | 27 | 0 |
| 1987 | 35 | 0 |
| 1988 | 34 | 0 |
| 1989 | 27 | 0 |
| 1990 | 20 | 0 |
| 1991 | 31 | 0 |
| 1992 | 27 | 0 |
| 1993 | 13 | 0 |
| 1994 | 27 | 0 |
| 1995 | 18 | 0 |
| 1996 | 19 | 0 |
| 1997 | 23 | 0 |
| 1998 | 16 | 0 |
| 1999 | 20 | 0 |
| 2000 | 30 | 0 |
| 2001 | 19 | 8 |
| 2002 | 32 | 24 |
| 2003 | 25 | 27 |
| 2004 | 16 | 26 |
| 2005 | 20 | 29 |
| 2006 | 11 | 12 |
| 2007 | 19 | 29 |
| 2008 | 21 | 27 |
| 2009 | 16 | 27 |
| 2010 | 29 | 42 |
| 2011 | 25 | 22 |
| 2012 | 19 | 40 |
| 2013 | 30 | 61 |
| 2014 | 40 | 58 |
| 2015 | 53 | 76 |
| 2016 | 51 | 74 |
| 2017 | 65 | 99 |
| 2018 | 63 | 87 |
| 2019 | 99 | 109 |
| 2020 | 88 | 104 |
| 2021 | 104 | 137 |
| 2022 | 128 | 114 |
| 2023 | 100 | 76 |
| 2024 | 92 | 112 |
| 2025 | 128 | 86 |
| 2026 | 66 | 39 |
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
- Energy release in energetic perforating devices6 Oct 2026US 12,753,682 B1Halliburton Energy Services.Inc.
- 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.
- Disposable perforation tool8 Oct 2026US 2026/0309008 A1Schlumberger Technology Corporation
- Fixed-Volume Setting Tool24 Sep 2026US 2026/0286798 A1DBK Industries, LLC
- Pump down well stimulation24 Sep 2026US 2026/0286814 A1Torsch Inc.
- 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
Most cited
By later US patents
- Method for treating multiple wellbore intervals339US 6,543,538 B2ExxonMobil Upstream Research Company · 2003
- Generating medium BTU gas from coal in situ276US 4,099,567 AIn Situ Technology, Inc. · 1978
- Method and apparatus for stimulation of multiple formation intervals249US 6,394,184 B2ExxonMobil Upstream Research Company · 2002
- Method and apparatus for providing controlled force transference to a wellbore tool200US 5,343,963 A1994
- Downhole anchoring tools conveyed by non-rigid carriers190US 6,315,043 B1Schlumberger Technology Corporation · 2001