E21B 43/11
Perforators
Official title: Perforators; Permeators
E21B43/11 (Perforators) appears on 2,785 US grants and 2,482 published applications in this corpus.
Search patents in E21B- Granted patents
- 2,785
- Published applications
- 2,482
- Assignees
- 533
- Inventors
- 3,147
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 11 | 0 |
| 1978 | 15 | 0 |
| 1979 | 9 | 0 |
| 1980 | 15 | 0 |
| 1981 | 12 | 0 |
| 1982 | 9 | 0 |
| 1983 | 10 | 0 |
| 1984 | 21 | 0 |
| 1985 | 40 | 0 |
| 1986 | 30 | 0 |
| 1987 | 42 | 0 |
| 1988 | 40 | 0 |
| 1989 | 32 | 0 |
| 1990 | 27 | 0 |
| 1991 | 35 | 0 |
| 1992 | 31 | 0 |
| 1993 | 20 | 0 |
| 1994 | 42 | 0 |
| 1995 | 29 | 0 |
| 1996 | 24 | 0 |
| 1997 | 28 | 0 |
| 1998 | 20 | 0 |
| 1999 | 24 | 0 |
| 2000 | 41 | 0 |
| 2001 | 28 | 13 |
| 2002 | 42 | 33 |
| 2003 | 34 | 42 |
| 2004 | 26 | 43 |
| 2005 | 29 | 53 |
| 2006 | 25 | 42 |
| 2007 | 36 | 53 |
| 2008 | 44 | 57 |
| 2009 | 39 | 61 |
| 2010 | 48 | 82 |
| 2011 | 54 | 59 |
| 2012 | 54 | 79 |
| 2013 | 59 | 113 |
| 2014 | 75 | 111 |
| 2015 | 85 | 144 |
| 2016 | 113 | 140 |
| 2017 | 116 | 146 |
| 2018 | 112 | 136 |
| 2019 | 152 | 165 |
| 2020 | 153 | 158 |
| 2021 | 162 | 183 |
| 2022 | 173 | 147 |
| 2023 | 134 | 99 |
| 2024 | 126 | 142 |
| 2025 | 160 | 124 |
| 2026 | 91 | 57 |
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
- Composition and methods for inhibiting corrosion of metal during acidizing a wellbore in a subterranean formation for fracking24 Sep 2026US 2026/0286211 A1
- Fixed-Volume Setting Tool24 Sep 2026US 2026/0286798 A1DBK Industries, LLC
- Perforating tool with a hydraulically actuated assembly24 Sep 2026US 2026/0286813 A1Saudi Arabian Oil Company
- Pump down well stimulation24 Sep 2026US 2026/0286814 A1Torsch Inc.
Most cited
By later US patents
- Method and apparatus for testing, completion and/or maintaining wellbores using a sensor device420US 5,829,520 ABaker Hughes Incorporated · 1998
- Method for treating multiple wellbore intervals339US 6,543,538 B2ExxonMobil Upstream Research Company · 2003
- Well completions with expandable casing portions297US 5,396,957 AHalliburton Company · 1995
- Well completions with expandable casing portions290US 5,325,923 AHalliburton Company · 1994
- Generating medium BTU gas from coal in situ276US 4,099,567 AIn Situ Technology, Inc. · 1978