E21B 7/007
Drilling by use of explosives
Official title: {Drilling by use of explosives (underwater drilling using explosives E21B7/1245)}
E21B7/007 (Drilling by use of explosives) appears on 57 US grants and 44 published applications in this corpus.
Search patents in E21B- Granted patents
- 57
- Published applications
- 44
- Assignees
- 25
- Inventors
- 102
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 4 |
| 2014 | 1 | 4 |
| 2015 | 3 | 2 |
| 2016 | 4 | 4 |
| 2017 | 1 | 5 |
| 2018 | 2 | 3 |
| 2019 | 5 | 4 |
| 2020 | 6 | 1 |
| 2021 | 1 | 4 |
| 2022 | 2 | 5 |
| 2023 | 5 | 1 |
| 2024 | 4 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus, rock drilling rig and drilling method5 May 2026US 12,618,290 B2Sandvik Mining and Construction Oy
- Bulkhead igniter with snap-on insulator27 May 2025US 12,312,914 B2DBK Industries, LLC
- Projectile augmented boring system30 Jul 2024US 12,049,825 B2Hypersciences, Inc.
- Projectile drilling system21 May 2024US 11,988,072 B1Hypersciences, Inc.
- Method and device for controlled filling and inspection of blast holes21 May 2024US 11,988,086 B2indurad GmbH
- Apparatus, rock drilling rig and drilling method6 Mar 2025US 2025/0075560 A1Sandvik Mining and Construction Oy
- Blast hole measurement and logging31 Oct 2024US 2024/0360754 A1Four Flags Pty Ltd
- Bulkhead Igniter with Snap-On Insulator27 Jun 2024US 2024/0209715 A1DBK Industries, LLC
- Projectile Drilling Systems and Methods13 Jul 2023US 2023/0220732 A1Hypersciences, Inc.
- Method and system for ultra-deep borehole geothermal energy harvesting20 Oct 2022US 2022/0333825 A1Mass Flow Energy, Inc.
Most cited
By later US patents
- Focused shock spark discharge drill using multiple electrodes183US 4,741,405 ATetra Corporation · 1988
- Electrohydraulic pressure wave projectors130US 6,215,734 B1Tetra Corporation · 2001
- Apparatus for completing a subterranean well and associated methods of using same64US 5,833,003 AHalliburton Energy Services.Inc. · 1998
- Plasma blasting method46US 5,106,164 ANoranda Inc. · 1992
- Directional drilling34US 4,582,147 ATround International, Inc. · 1986