E21B 10/14
Combined with non-rolling cutters other than of leading-portion type
Official title: combined with non-rolling cutters other than of leading-portion type
E21B10/14 (Combined with non-rolling cutters other than of leading-portion type) appears on 103 US grants and 105 published applications in this corpus.
Search patents in E21B- Granted patents
- 103
- Published applications
- 105
- Assignees
- 35
- Inventors
- 179
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 3 | 8 |
| 2011 | 2 | 10 |
| 2012 | 4 | 2 |
| 2013 | 4 | 4 |
| 2014 | 1 | 5 |
| 2015 | 5 | 7 |
| 2016 | 3 | 10 |
| 2017 | 4 | 7 |
| 2018 | 11 | 5 |
| 2019 | 6 | 13 |
| 2020 | 10 | 8 |
| 2021 | 7 | 7 |
| 2022 | 9 | 6 |
| 2023 | 2 | 2 |
| 2024 | 6 | 2 |
| 2025 | 2 | 3 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Earth-boring tools, hybrid earth-boring tools, and associated apparatus and methods29 Sep 2026US 12,747,636 B2Baker Hughes Oilfield Operations LLC
- Variable cutting element exposure in a cutting tool1 Sep 2026US 12,723,472 B1Schlumberger Technology Corporation
- Non-uniform roller cone14 Jul 2026US 12,680,393 B2Schlumberger Technology Corporation
- Earth-boring tool geometry and associated apparatus and methods19 Aug 2025US 12,392,199 B2
- Two-stage drill bit12 Aug 2025US 12,385,324 B2Schlumberger Technology Corporation
- Earth-boring tools, hybrid earth-boring tools, and associated apparatus and methods27 Aug 2026US 2026/0251018 A1Baker Hughes Oilfield Operations LLC
- Pdc-roller hybrid drill bit6 Aug 2026US 2026/0226798 A1China Petroleum & Chemical Corporation
- Blunt-nosed roller cone hybrid bit25 Dec 2025US 2025/0389159 A1Schlumberger Technology Corporation
- Non-uniform roller cone28 Aug 2025US 2025/0270882 A1Schlumberger Technology Corporation
- Two-stage drill bit8 May 2025US 2025/0146365 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Centered-leg roller cone drill bit157US 6,439,326 B1Smith International, Inc. · 2002
- Drill bit with yielding support and force applying structure for abrasion cutting elements131US 4,386,669 A1983
- Cutter head for pit-boring machine116US 4,448,269 AHitachi Construction Machinery Co., Ltd. · 1984
- Hybrid rock bit97US 4,343,371 ASmith International, Inc. · 1982
- Diamond cutter rock bit with penetration limiting94US 4,006,788 ASmith International, Inc. · 1977