E21B 10/602
The bit being a rotary drag type bit with blades
Official title: {the bit being a rotary drag type bit with blades}
E21B10/602 (The bit being a rotary drag type bit with blades) appears on 252 US grants and 187 published applications in this corpus.
Search patents in E21B- Granted patents
- 252
- Published applications
- 187
- Assignees
- 90
- Inventors
- 366
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 9 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 0 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 6 | 0 |
| 2000 | 16 | 0 |
| 2001 | 6 | 0 |
| 2002 | 2 | 0 |
| 2003 | 5 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 9 |
| 2007 | 1 | 3 |
| 2008 | 5 | 7 |
| 2009 | 3 | 6 |
| 2010 | 3 | 10 |
| 2011 | 6 | 7 |
| 2012 | 4 | 8 |
| 2013 | 9 | 8 |
| 2014 | 7 | 6 |
| 2015 | 7 | 12 |
| 2016 | 8 | 13 |
| 2017 | 4 | 16 |
| 2018 | 13 | 11 |
| 2019 | 15 | 16 |
| 2020 | 16 | 13 |
| 2021 | 17 | 9 |
| 2022 | 6 | 4 |
| 2023 | 2 | 7 |
| 2024 | 4 | 4 |
| 2025 | 6 | 8 |
| 2026 | 12 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydrojets rotary drill bit6 Oct 2026US 12,753,657 B2Cooled Edge Bits, Inc.
- Devices, systems, and methods for a cutting element6 Oct 2026US 12,753,658 B2Schlumberger Technology Corporation
- Underground directional drilling apparatus22 Sep 2026US 12,742,358 B1Melfred Borzall, Inc.
- Drill head for use with microtunneling apparatus15 Sep 2026US 12,735,946 B2OptionX Holdings Pty Ltd
- Drill head for use with microtunneling apparatus1 Sep 2026US 12,723,470 B2OptionX Holdings Pty Ltd
- Underground directional drilling apparatus24 Sep 2026US 2026/0286786 A1Melfred Borzall, Inc.
- Fully sealed down the hole hammer16 Jul 2026US 2026/0201760 A1Sandvik Mining and Construction Oy
- Rotating check valve for improved downhole operations2 Jul 2026US 2026/0185408 A1Schlumberger Technology Corporation
- Centrally located drill bit cleaning element2 Jul 2026US 2026/0185409 A1Schlumberger Technology Corporation
- A drill head for use with microtunneling apparatus30 Apr 2026US 2026/0117595 A1OptionX Holdings Pty Ltd
Most cited
By later US patents
- Impregnated bit with PDC cutters in cone area197US 6,510,906 B1Baker Hughes Incorporated · 2003
- Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped129US 6,408,958 B1Baker Hughes Incorporated · 2002
- Rotary drill bits128US 5,992,547 ACamco International (UK) Limited · 1999
- Drag blade bit with diamond cutting elements125US 4,499,958 AStrata Bit Corporation · 1985
- Rotary drill bits and methods of designing such drill bits115US 5,222,566 ACamco Drilling Group Limited · 1993