E21B 10/34
Of roller-cutter type
Official title: of roller-cutter type
E21B10/34 (Of roller-cutter type) appears on 78 US grants and 29 published applications in this corpus.
Search patents in E21B- Granted patents
- 78
- Published applications
- 29
- Assignees
- 28
- Inventors
- 112
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 2 |
| 2003 | 0 | 2 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 2 |
| 2018 | 0 | 1 |
| 2019 | 2 | 2 |
| 2020 | 2 | 2 |
| 2021 | 2 | 3 |
| 2022 | 3 | 2 |
| 2023 | 2 | 1 |
| 2024 | 3 | 2 |
| 2025 | 3 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Microtunneling apparatus27 Jan 2026US 12,534,963 B2OptionX Holdings Pty Ltd
- Microtunneling apparatus13 Jan 2026US 12,523,103 B2OptionX Holdings Pty Ltd
- Drill head for creating a borehole in the ground4 Nov 2025US 12,460,487 B2Herrenknecht AG
- Downhole earth-boring rotary drill bits comprising center cutting modules and related methods20 May 2025US 12,305,450 B1Baker Hughes Oilfield Operations LLC
- Earth-boring tools including rotatable cutting elements, rotatable cutting elements, and associated components and methods25 Mar 2025US 12,258,815 B2Baker Hughes Oilfield Operations LLC
- Microtunneling apparatus3 Jul 2025US 2025/0215750 A1OptionX Holdings Pty Ltd
- Microtunneling apparatus3 Jul 2025US 2025/0215753 A1OptionX Holdings Pty Ltd
- Downhole earth-boring rotary drill bits comprising center cutting modules and related methods22 May 2025US 2025/0163760 A1Baker Hughes Oilfield Operations LLC
- Earth-boring tools including rotatable cutting elements, rotatable cutting elements, and associated components and methods25 Jul 2024US 2024/0247547 A1Baker Hughes Oilfield Operations LLC
- Drill head for creating a borehole in the ground27 Jun 2024US 2024/0209699 A1Herrenknecht AG
Most cited
By later US patents
- Process and apparatus for completing a well in an unconsolidated formation164US 5,255,741 AMobil Oil Corporation · 1993
- Stabilizer and rotary expansible drill bit apparatus113US 4,081,042 ATri-State Oil Tool Industries, Inc. · 1978
- Expandable stabilizer with roller reamer elements111US 8,028,767 B2Baker Hughes Incorporated · 2011
- Sonic apparatus and method for slurry well bore mining and production99US 4,366,988 A1983
- Remotely operable hydraulic underreamer99US 6,378,632 B1Smith International, Inc. · 2002