E21B 4/06
Down-hole impacting means
Official title: Down-hole impacting means, e.g. hammers (boring rams E21B11/02)
E21B4/06 (Down-hole impacting means) appears on 795 US grants and 454 published applications in this corpus.
Search patents in E21B- Granted patents
- 795
- Published applications
- 454
- Assignees
- 287
- Inventors
- 906
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 11 | 0 |
| 1978 | 13 | 0 |
| 1979 | 6 | 0 |
| 1980 | 7 | 0 |
| 1981 | 14 | 0 |
| 1982 | 5 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 9 | 0 |
| 1986 | 14 | 0 |
| 1987 | 16 | 0 |
| 1988 | 14 | 0 |
| 1989 | 24 | 0 |
| 1990 | 22 | 0 |
| 1991 | 16 | 0 |
| 1992 | 27 | 0 |
| 1993 | 14 | 0 |
| 1994 | 21 | 0 |
| 1995 | 13 | 0 |
| 1996 | 15 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 14 | 0 |
| 2000 | 17 | 0 |
| 2001 | 11 | 3 |
| 2002 | 17 | 11 |
| 2003 | 14 | 12 |
| 2004 | 10 | 17 |
| 2005 | 6 | 12 |
| 2006 | 14 | 5 |
| 2007 | 8 | 18 |
| 2008 | 14 | 19 |
| 2009 | 10 | 20 |
| 2010 | 15 | 23 |
| 2011 | 18 | 24 |
| 2012 | 20 | 16 |
| 2013 | 11 | 22 |
| 2014 | 19 | 24 |
| 2015 | 25 | 25 |
| 2016 | 23 | 24 |
| 2017 | 13 | 21 |
| 2018 | 27 | 31 |
| 2019 | 24 | 9 |
| 2020 | 21 | 23 |
| 2021 | 25 | 15 |
| 2022 | 21 | 26 |
| 2023 | 25 | 20 |
| 2024 | 22 | 16 |
| 2025 | 17 | 15 |
| 2026 | 11 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and system for controlling drill functionality6 Oct 2026US 12,753,689 B2Technological Resources Pty. Limited
- Down-the-hole drill hammer having a piston follower valve1 Sep 2026US 12,723,469 B2Center Rock Inc.
- Torque-adaptive impact tool suitable for PDC bit14 Jul 2026US 12,680,385 B2Southwest Petroleum University
- Hybrid hydraulic down-the-hole hammer14 Jul 2026US 12,680,386 B2Mincon International Limited
- Hydraulic down-the-hole hammer and subsea pile23 Jun 2026US 12,662,880 B2Mincon International Limited
- Drill string apparatus11 Jun 2026US 2026/0160132 A1
- Hybrid hydraulic down-the-hole hammer5 Feb 2026US 2026/0035997 A1Mincon International Limited
- Drilling robot1 Jan 2026US 2026/0002414 A1ZHAW - Zürcher Hochschule Für Angewandte Wissenschaften
- Systems and Methods for Downhole Service Tools27 Nov 2025US 2025/0361792 A1Schlumberger Technology Corporation
- Air motor assembly20 Nov 2025US 2025/0354482 A1Directional Air Drilling International, LLC
Most cited
By later US patents
- Split bit casing drill183US 3,945,444 AThe Anaconda Company · 1976
- Fluid operated vibratory jar with rotating bit155US 5,156,223 A1992
- Fluid operated vibratory jar with rotating bit128US 4,958,691 A1990
- Percussion drill assembly128US 5,662,180 ADresser-Rand Company · 1997
- Fluid operated vibratory oil well drilling tool119US 6,062,324 ABaker Hughes Incorporated · 2000