E21B 43/263
Using explosives
Official title: using explosives
E21B43/263 (Using explosives) appears on 310 US grants and 245 published applications in this corpus.
Search patents in E21B- Granted patents
- 310
- Published applications
- 245
- Assignees
- 132
- Inventors
- 508
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 12 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 10 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 3 | 2 |
| 2003 | 0 | 6 |
| 2004 | 3 | 0 |
| 2005 | 0 | 3 |
| 2006 | 2 | 7 |
| 2007 | 3 | 3 |
| 2008 | 6 | 3 |
| 2009 | 2 | 9 |
| 2010 | 4 | 5 |
| 2011 | 2 | 5 |
| 2012 | 5 | 6 |
| 2013 | 3 | 20 |
| 2014 | 4 | 17 |
| 2015 | 9 | 19 |
| 2016 | 19 | 19 |
| 2017 | 15 | 21 |
| 2018 | 17 | 13 |
| 2019 | 22 | 23 |
| 2020 | 15 | 16 |
| 2021 | 15 | 20 |
| 2022 | 18 | 12 |
| 2023 | 16 | 5 |
| 2024 | 9 | 5 |
| 2025 | 4 | 3 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Well pattern arrangement method for in-situ leaching of low-permeability sandstone-type uranium deposit15 Sep 2026US 12,735,970 B1Shijiazhuang Tiedao University
- Systems and methods of initiating energetic reactions for reservoir stimulation24 Feb 2026US 12,560,066 B2Schlumberger Technology Corporation
- Systems and methods for facilitating effective fracture initiation17 Feb 2026US 12,553,326 B2Schlumberger Technology Corporation
- Enhancing transverse fractures while performing hydraulic fracturing within an openhole borehole20 Jan 2026US 12,529,299 B2Schlumberger Technology Corporation
- Penetrator and dispensers and methods of use22 Jul 2025US 12,366,151 B2Defiant Engineering, LLC
- Systems and methods for facilitating effective fracture initiation25 Jun 2026US 2026/0176947 A1Schlumberger Technology Corporation
- Systems and methods for facilitating effective fracture initiation5 Feb 2026US 2026/0036030 A1Schlumberger Technology Corporation
- Systems and Methods of Initiating Energetic Reactions for Reservoir Stimulation31 Jul 2025US 2025/0243739 A1Schlumberger Technology Corporation
- Tool and Method for Safe Cavity Shot Operations12 Jun 2025US 2025/0188827 A1Hunting Titan, Inc.
- Fluidized coal mining method utilizing self-energy storage of coal seam6 Mar 2025US 2025/0075605 A1China University of Mining and Technology
Most cited
By later US patents
- Oil recovery method and apparatus312US 4,305,463 AOil Trieval Corporation · 1981
- Apparatus and method for perforating and stimulating a subterranean formation156US 5,775,426 AMarathon Oil Company · 1998
- Method and system for extraction of hydrocarbons from oil shale129US 7,445,041 B2Shale and Sands Oil Recovery LLC · 2008
- Method for in situ heating of hydrocarbonaceous formations123US 4,705,108 AThe United States of America as represented by the United States Department of Energy · 1987
- Apparatus and method for perforating a subterranean formation104US 6,755,249 B2Halliburton Energy Services.Inc. · 2004