E21B 49/04
Using explosives in boreholes
Official title: using explosives in boreholes; using projectiles penetrating the wall
E21B49/04 (Using explosives in boreholes) appears on 28 US grants and 15 published applications in this corpus.
Search patents in E21B- Granted patents
- 28
- Published applications
- 15
- Assignees
- 14
- Inventors
- 55
- Latest grant
- 21 May 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 0 | 2 |
| 2020 | 3 | 3 |
| 2021 | 3 | 0 |
| 2022 | 0 | 2 |
| 2023 | 2 | 0 |
| 2024 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Projectile drilling system21 May 2024US 11,988,072 B1Hypersciences, Inc.
- Tunneling and mining method using pre-conditioned hole pattern7 May 2024US 11,976,556 B2Hypersciences, Inc.
- System for generation of thermal energy13 Jun 2023US 11,674,388 B1Hypersciences, Inc.
- Ram accelerator augmented drilling system11 Apr 2023US 11,624,235 B2Hypersciences, Inc.
- Method and system for acquiring geological data from a bore hole2 Nov 2021US 11,162,359 B2
- Tunneling and mining method using pre-conditioned hole pattern12 May 2022US 2022/0145759 A1Hypersciences, Inc.
- Ram accelerator augmented drilling system24 Feb 2022US 2022/0056763 A1Hypersciences, Inc.
- Method and system for acquiring geological data from a bore hole31 Dec 2020US 2020/0408091 A1Reflex Instruments Asia Pacific Pty Ltd
- Subterranean Well Torpedo System29 Oct 2020US 2020/0340791 A1Saudi Arabian Oil Company
- Method and system for acquiring geological data from a bore hole16 Jul 2020US 2020/0224532 A1Reflex Instruments Asia Pacific Pty Ltd
Most cited
By later US patents
- Downhole formation testing tool42US 7,191,831 B2Schlumberger Technology Corporation · 2007
- Apparatus and methods for sidewall percussion coring using a voltage activated igniter30US 8,230,946 B2Halliburton Energy Services.Inc. · 2012
- Sidewall core gun29US 4,609,056 AHalliburton Company · 1986
- Method and apparatus for formation sampling during the drilling of a hydrocarbon well26US 5,445,228 AAtlantic Richfield Company · 1995
- Formation sampling bullet and cables therefor20US 4,750,570 ABarrett Machine Works · 1988