E21B 1/00
Percussion drilling
E21B1/00 (Percussion drilling) appears on 234 US grants and 225 published applications in this corpus.
Search patents in E21B- Granted patents
- 234
- Published applications
- 225
- Assignees
- 133
- Inventors
- 448
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 4 |
| 2005 | 0 | 1 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 3 | 3 |
| 2009 | 1 | 11 |
| 2010 | 2 | 10 |
| 2011 | 10 | 4 |
| 2012 | 4 | 3 |
| 2013 | 2 | 7 |
| 2014 | 4 | 8 |
| 2015 | 6 | 10 |
| 2016 | 8 | 14 |
| 2017 | 10 | 13 |
| 2018 | 10 | 14 |
| 2019 | 13 | 9 |
| 2020 | 16 | 36 |
| 2021 | 24 | 12 |
| 2022 | 21 | 13 |
| 2023 | 16 | 11 |
| 2024 | 13 | 26 |
| 2025 | 19 | 6 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic impact mechanism for use in equipment for processing rock and concrete16 Jun 2026US 12,655,687 B2T-Rig Limited
- Method and system for detecting a state of a joint of a drill string16 Jun 2026US 12,655,744 B2Epiroc Rock Drills Aktiebolag
- Drill bit assembly for reverse circulation hammer2 Jun 2026US 12,644,338 B2Mincon International Limited
- Producing hydro-efflux hammer using catalyst-free PDC cutters5 May 2026US 12,617,015 B2Saudi Arabian Oil Company
- Down-the-hole hammer with ported piston and flow control valve21 Apr 2026US 12,607,069 B2Caterpillar Inc.
- Producing hydro-efflux hammer using catalyst-free pdc cutters20 Aug 2026US 2026/0241447 A1Saudi Arabian Oil Company
- Drill string apparatus11 Jun 2026US 2026/0160132 A1
- Hydraulic Hammering Device7 May 2026US 2026/0125951 A1Furukawa Rock Drill Co., Ltd.
- System and method of manually operated drilling on an extraterrestrial surface7 May 2026US 2026/0125954 A1Honeybee Robotics, LLC
- Solid-state cooling of drilling fluid on a rig16 Apr 2026US 2026/0103951 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Automatic drive hammer system and method for use thereof29US 4,993,500 AMobile Drilling Company, Inc. · 1991
- Electromagnetic percussion appliance23US 4,215,297 A1980
- Back driving automatic hammer23US 6,003,619 A1999
- Hand-held hammer tool22US 4,766,963 AInstitut Cerac S. A. · 1988
- Liquid inertia tool19US 4,484,638 A1984