E21B 10/003
Drill bits: with cutting edges facing in opposite axial directions
Official title: {with cutting edges facing in opposite axial directions}
E21B10/003 (Drill bits: with cutting edges facing in opposite axial directions) appears on 43 US grants and 27 published applications in this corpus.
Search patents in E21B- Granted patents
- 43
- Published applications
- 27
- Assignees
- 20
- Inventors
- 94
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 3 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 8 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 5 | 0 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 1 | 2 |
| 2016 | 2 | 0 |
| 2017 | 0 | 2 |
| 2018 | 0 | 2 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Casing drill bit facilitating drill-out thereof, and related methods of manufacture and use7 Apr 2026US 12,595,704 B2
- Cutting a wellbore tubular21 Jan 2025US 12,203,330 B2Saudi Arabian Oil Company
- Reversible polycrystalline diamond compact bit21 Nov 2023US 11,821,263 B2Saudi Arabian Oil Company
- Anti-collapse jet grouting drill bit with bi-directional rib wings, grouting consolidation system and method10 Aug 2021US 11,085,244 B2Shandong University
- Bi-directional drilling systems and methods23 Jun 2020US 10,689,910 B2Schlumberger Technology Corporation
- Casing drill bit facilitating drill-out thereof, and related methods of manufacture and use28 Nov 2024US 2024/0392629 A1Baker Hughes Oilfield Operations LLC
- Cutting a wellbore tubular7 Nov 2024US 2024/0368954 A1Saudi Arabian Oil Company
- Reversible polycrystalline diamond compact bit21 Apr 2022US 2022/0120138 A1Saudi Arabian Oil Company
- Percussive Drill String Assemblies And Systems And Methods Of Using Same19 Mar 2020US 2020/0087994 A1Bly IP Inc.
- Anti-collapse jet grouting drill bit with bi-directional rib wings, grouting consolidation system and method24 Jan 2019US 2019/0024460 A1Shandong University
Most cited
By later US patents
- Rotary drill bits128US 5,992,547 ACamco International (UK) Limited · 1999
- Deep hole rock drill bit94US 4,445,580 ASyndrill Carbide Diamond Company · 1984
- Stabilizer-reamer for drilling an oil well87US 5,788,000 AElf Aquitaine Production · 1998
- Rock-breaking tool for percussive-action machines84US 4,280,573 A1981
- Rotary drill bits76US 5,967,246 ACamco International (UK) Limited · 1999