E21B 10/36
Percussion drill bits
Official title: Percussion drill bits ({with helical conveying portion E21B10/445;} characterised by wear resisting parts E21B10/46)
E21B10/36 (Percussion drill bits) appears on 476 US grants and 345 published applications in this corpus.
Search patents in E21B- Granted patents
- 476
- Published applications
- 345
- Assignees
- 182
- Inventors
- 693
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 6 | 0 |
| 1978 | 9 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 10 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 13 | 0 |
| 1989 | 10 | 0 |
| 1990 | 10 | 0 |
| 1991 | 12 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 9 | 0 |
| 2001 | 8 | 2 |
| 2002 | 13 | 7 |
| 2003 | 6 | 6 |
| 2004 | 8 | 19 |
| 2005 | 6 | 3 |
| 2006 | 11 | 13 |
| 2007 | 9 | 15 |
| 2008 | 13 | 32 |
| 2009 | 10 | 13 |
| 2010 | 19 | 17 |
| 2011 | 14 | 14 |
| 2012 | 4 | 12 |
| 2013 | 17 | 25 |
| 2014 | 9 | 25 |
| 2015 | 12 | 12 |
| 2016 | 15 | 20 |
| 2017 | 13 | 14 |
| 2018 | 16 | 15 |
| 2019 | 17 | 11 |
| 2020 | 15 | 17 |
| 2021 | 17 | 8 |
| 2022 | 8 | 13 |
| 2023 | 7 | 10 |
| 2024 | 21 | 13 |
| 2025 | 9 | 7 |
| 2026 | 5 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Jetting system for drilling operations8 Sep 2026US 12,729,588 B1Saudi Arabian Oil Company
- 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
- Earth-drilling tool21 Apr 2026US 12,607,071 B2Kennametal India Limited
- Down-the-hole hammer having an inverted casing13 Jan 2026US 12,523,102 B2Center Rock Inc.
- Producing hydro-efflux hammer using catalyst-free pdc cutters20 Aug 2026US 2026/0241447 A1Saudi Arabian Oil Company
- Fully sealed down the hole hammer16 Jul 2026US 2026/0201760 A1Sandvik Mining and Construction Oy
- Ringbit for drilling tool and drilling tool6 Nov 2025US 2025/0339905 A1Robit PLC
- Drill bit assembly for reverse circulation hammer7 Aug 2025US 2025/0250862 A1Mincon International Limited
- Percussive Drill Bit3 Jul 2025US 2025/0215752 A1Boart Longyear Manufacturing And Distribution Inc.
Most cited
By later US patents
- Downhole drill bit and bit coupling155US 4,962,822 ANuma Tool Company · 1990
- Drilling apparatus for replacing underground pipes113US 5,791,419 ARD Trenchless Ltd. Oy · 1998
- Earth drilling knobby bit105US 4,096,917 A1978
- Percussion rock drill bit105US 5,794,728 ASandvik AB · 1998
- Apparatus for directional boring under mixed conditions102US 6,454,025 B1Vermeer Manufacturing Company · 2002