E21B 43/11855
Mechanically actuated
Official title: {mechanically actuated, e.g. by movement of a wireline or a drop-bar (E21B43/11852 takes precedence)}
E21B43/11855 (Mechanically actuated) appears on 104 US grants and 80 published applications in this corpus.
Search patents in E21B- Granted patents
- 104
- Published applications
- 80
- Assignees
- 32
- Inventors
- 154
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 8 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 3 | 2 |
| 2014 | 2 | 3 |
| 2015 | 2 | 6 |
| 2016 | 3 | 2 |
| 2017 | 2 | 5 |
| 2018 | 5 | 6 |
| 2019 | 5 | 10 |
| 2020 | 6 | 9 |
| 2021 | 11 | 10 |
| 2022 | 1 | 5 |
| 2023 | 13 | 5 |
| 2024 | 3 | 4 |
| 2025 | 6 | 5 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fully automated perforating gun2 Jun 2026US 12,644,362 B2Halliburton Energy Services.Inc.
- Ballistically safe wellbore tool16 Dec 2025US 12,497,870 B2DynaEnergetics Europe GmbH
- Modular perforating gun system22 Jul 2025US 12,366,142 B2DynaEnergetics Europe GmbH
- Igniter for a setting tool for a perforating gun assembly25 Mar 2025US 12,258,844 B2XConnect, LLC
- Connector for perforating gun system4 Mar 2025US 12,241,343 B2Halliburton Energy Services.Inc.
- Fully automated perforating gun17 Sep 2026US 2026/0275835 A1Halliburton Energy Services.Inc.
- Ballistic interrupt to close a circuit to a detonator28 May 2026US 2026/0146514 A1Schlumberger Technology Corporation
- Modular perforating gun system30 Oct 2025US 2025/0334028 A1DynaEnergetics Europe GmbH
- Integrated perforating gun and setting tool system and method1 May 2025US 2025/0137361 A1Geodynamics, Inc.
- Ballistically safe wellbore tool20 Feb 2025US 2025/0059860 A1DynaEnergetics Europe GmbH
Most cited
By later US patents
- Firing head with metered delay123US 5,992,289 AHalliburton Energy Services.Inc. · 1999
- Perforating gun with integrated initiator117US 10,077,641 B2Schlumberger Technology Corporation · 2018
- Method and apparatus for perforating subsurface earth formations106US 4,491,185 A1985
- Tubing conveyed perforating gun electrical detonator104US 4,574,892 AHalliburton Company · 1986
- Universal perforating gun firing head101US 5,603,384 AWestern Atlas International, Inc. · 1997