E21B 6/00
Drives for drilling with combined rotary and percussive action
E21B6/00 (Drives for drilling with combined rotary and percussive action) appears on 257 US grants and 180 published applications in this corpus.
Search patents in E21B- Granted patents
- 257
- Published applications
- 180
- Assignees
- 140
- Inventors
- 415
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 6 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 9 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 4 |
| 2003 | 1 | 3 |
| 2004 | 4 | 4 |
| 2005 | 5 | 7 |
| 2006 | 4 | 5 |
| 2007 | 4 | 5 |
| 2008 | 7 | 3 |
| 2009 | 6 | 7 |
| 2010 | 3 | 6 |
| 2011 | 2 | 7 |
| 2012 | 4 | 5 |
| 2013 | 5 | 8 |
| 2014 | 7 | 11 |
| 2015 | 8 | 4 |
| 2016 | 3 | 10 |
| 2017 | 10 | 11 |
| 2018 | 9 | 16 |
| 2019 | 12 | 8 |
| 2020 | 15 | 14 |
| 2021 | 10 | 7 |
| 2022 | 8 | 8 |
| 2023 | 7 | 8 |
| 2024 | 10 | 8 |
| 2025 | 8 | 8 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Handheld augers operable in a normal mode and a breaker mode14 Jul 2026US 12,680,388 B2Milwaukee Electric Tool Corporation
- Drill bit assembly for reverse circulation hammer2 Jun 2026US 12,644,338 B2Mincon International Limited
- Drilling assembly14 Apr 2026US 12,601,223 B2BAUER Spezialtiefbau GmbH
- State self-adaptive turbine type pulse generator and downhole drilling tool25 Nov 2025US 12,480,365 B2China Petroleum & Chemical Corporation
- Air motor assembly23 Sep 2025US 12,421,847 B1Directional Air Drilling International, LLC
- Augers8 Oct 2026US 2026/0308981 A1Milwaukee Electric Tool Corporation
- Shank sleeve assembly, rock drilling machine and method10 Sep 2026US 2026/0266135 A1Sandvik Mining and Construction Oy
- Water well top head drill adapter18 Jun 2026US 2026/0168329 A1Fulton Fusion, Inc.
- Air motor assembly20 Nov 2025US 2025/0354482 A1Directional Air Drilling International, LLC
- Drilling assembly6 Nov 2025US 2025/0341132 A1BAUER Spezialtiefbau GmbH
Most cited
By later US patents
- Hammer for use in a bore hole and apparatus for use therewith38US 4,705,118 A1987
- Power drill with drill bit unit capable of providing intermittent axial impact37US 5,531,278 A1996
- Dual member pipe joint for a dual member drill string36US 5,682,956 AThe Charles Machine Works, Inc. · 1997
- Using a rotating inner member to drive a tool in a hollow outer member35US 6,739,413 B2The Charles Machine Works, Inc. · 2004
- Jack element in communication with an electric motor and or generator35US 7,484,576 B22009