E21B 43/11857
Firing indication systems
Official title: {firing indication systems}
E21B43/11857 (Firing indication systems) appears on 63 US grants and 64 published applications in this corpus.
Search patents in E21B- Granted patents
- 63
- Published applications
- 64
- Assignees
- 27
- Inventors
- 112
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 2 |
| 2002 | 1 | 3 |
| 2003 | 2 | 1 |
| 2004 | 0 | 2 |
| 2005 | 4 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 2 | 1 |
| 2009 | 2 | 2 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 1 | 7 |
| 2013 | 1 | 1 |
| 2014 | 2 | 1 |
| 2015 | 2 | 4 |
| 2016 | 2 | 2 |
| 2017 | 2 | 2 |
| 2018 | 3 | 1 |
| 2019 | 2 | 6 |
| 2020 | 4 | 0 |
| 2021 | 3 | 5 |
| 2022 | 4 | 5 |
| 2023 | 2 | 7 |
| 2024 | 5 | 2 |
| 2025 | 3 | 3 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electronic device and method for orientation-measuring device for downhole perforations22 Sep 2026US 12,742,372 B2Advanced Wireline Solutions, Inc.
- System and method for monitoring well operations17 Feb 2026US 12,553,335 B2Intelligent Wellhead Systems Inc.
- Regulating detonation of perforation modules in unbalanced conditions13 Jan 2026US 12,523,126 B2Saudi Arabian Oil Company
- Addressable ignition stage for enabling a detonator/ignitor23 Sep 2025US 12,422,237 B2
- Control module for a detonation sub and a detonation sub22 Jul 2025US 12,366,145 B2
- Regulating Detonation of Perforation Modules in Unbalanced Conditions3 Jul 2025US 2025/0215769 A1Saudi Arabian Oil Company
- System and method for surface devices used for downhole perforations3 Apr 2025US 2025/0109668 A1Advanced Wireline Solutions, Inc.
- Perforating Panel Unit And Method9 Jan 2025US 2025/0012175 A1Hunting Titan, Inc.
- Electronic device and method for orientation-measuring device for downhole perforations26 Dec 2024US 2024/0426196 A1Advanced Wireline Solutions, Inc.
- Addressable Ignition Stage for Enabling a Detonator/Ignitor18 Jan 2024US 2024/0019234 A1
Most cited
By later US patents
- Communicating with a tool118US 6,938,689 B2Schumberger Technology Corporation · 2005
- Secure activation of a downhole device115US 7,347,278 B2Schlumberger Technology Corporation · 2008
- Methods and apparatus for selectively operating multi-charge well bore guns109US 4,208,966 ASchlumberger Technology Corporation · 1980
- Intelligent perforating well system and method109US 6,837,310 B2Schlumberger Technology Corporation · 2005
- Apparatus string for use in a wellbore96US 8,157,022 B2Schlumberger Technology Corporation · 2012