E21B 29/02
Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes
Official title: by explosives or by thermal or chemical means {(freeing stuck objects by explosives E21B31/002)}
E21B29/02 (Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes) appears on 583 US grants and 541 published applications in this corpus.
Search patents in E21B- Granted patents
- 583
- Published applications
- 541
- Assignees
- 171
- Inventors
- 845
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 14 | 0 |
| 2001 | 6 | 1 |
| 2002 | 3 | 3 |
| 2003 | 5 | 6 |
| 2004 | 8 | 6 |
| 2005 | 4 | 4 |
| 2006 | 5 | 5 |
| 2007 | 0 | 4 |
| 2008 | 2 | 4 |
| 2009 | 3 | 0 |
| 2010 | 3 | 10 |
| 2011 | 4 | 6 |
| 2012 | 11 | 13 |
| 2013 | 10 | 23 |
| 2014 | 7 | 27 |
| 2015 | 16 | 26 |
| 2016 | 17 | 40 |
| 2017 | 35 | 43 |
| 2018 | 33 | 58 |
| 2019 | 52 | 48 |
| 2020 | 35 | 49 |
| 2021 | 56 | 41 |
| 2022 | 52 | 40 |
| 2023 | 36 | 28 |
| 2024 | 28 | 20 |
| 2025 | 28 | 29 |
| 2026 | 14 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems, tools and methods for well decommissioning29 Sep 2026US 12,747,646 B2Foro Energy, Inc.
- Insensitive high explosive based tubing cutter1 Sep 2026US 12,723,479 B2Halliburton Energy Services.Inc.
- Downhole system for conveying an explosive tool within a wellbore and reducing damage to other tools of the downhole system1 Sep 2026US 12,723,480 B2
- Systems and methods for activating a pressure-sensitive downhole tool18 Aug 2026US 12,709,953 B2Robertson Intellectual Properties, LLC
- Dissolvable lock16 Jun 2026US 12,655,699 B2Shale Oil Tools, LLC
- Method of well decommissioning in through-tubing applications23 Jul 2026US 2026/0210216 A1Schlumberger Technology Corporation
- Segmented expanding gun for plug and abandonment applications16 Jul 2026US 2026/0201763 A1Schlumberger Technology Corporation
- Systems and methods for using explosive expansion downhole tools to reduce amount of undesirable fluids in hydrocarbons produced via a wellbore14 May 2026US 2026/0132693 A1
- Dissolvable Lock23 Apr 2026US 2026/0110228 A1Shale Oil Tools, LLC
- Well abandonment19 Mar 2026US 2026/0078653 A1Callidus Capital B.V.
Most cited
By later US patents
- Apparatus and method for removing a frangible rupture disc or other frangible device from a wellbore casing147US 6,397,950 B1Halliburton Energy Services.Inc. · 2002
- Selectable, internally oriented and/or integrally transportable explosive assemblies138US 9,689,223 B2Halliburton Energy Services.Inc. · 2017
- Dissolvable grip or seal arrangement132US 5,709,269 A1998
- Wellbore gun perforating system and method124US 9,194,219 B1Geodynamics, Inc. · 2015
- Methods and apparatus for severing conduits123US 4,290,486 AJet Research Center, Inc. · 1981