E21B 10/43
Characterised by the arrangement of teeth or other cutting elements
Official title: characterised by the arrangement of teeth or other cutting elements
E21B10/43 (Characterised by the arrangement of teeth or other cutting elements) appears on 425 US grants and 450 published applications in this corpus.
Search patents in E21B- Granted patents
- 425
- Published applications
- 450
- Assignees
- 127
- Inventors
- 665
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 7 |
| 2002 | 9 | 11 |
| 2003 | 6 | 7 |
| 2004 | 7 | 4 |
| 2005 | 2 | 1 |
| 2006 | 4 | 7 |
| 2007 | 2 | 11 |
| 2008 | 3 | 17 |
| 2009 | 3 | 13 |
| 2010 | 12 | 21 |
| 2011 | 9 | 20 |
| 2012 | 12 | 17 |
| 2013 | 9 | 26 |
| 2014 | 19 | 22 |
| 2015 | 14 | 22 |
| 2016 | 21 | 27 |
| 2017 | 17 | 14 |
| 2018 | 29 | 19 |
| 2019 | 26 | 26 |
| 2020 | 27 | 32 |
| 2021 | 21 | 23 |
| 2022 | 22 | 32 |
| 2023 | 23 | 15 |
| 2024 | 31 | 23 |
| 2025 | 25 | 12 |
| 2026 | 13 | 21 |
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
- Jetting system for drilling operations8 Sep 2026US 12,729,588 B1Saudi Arabian Oil Company
- Variable cutting element exposure in a cutting tool1 Sep 2026US 12,723,472 B1Schlumberger Technology Corporation
- Fixed cutter drill bits with mechanically attached cutter element assemblies18 Aug 2026US 12,709,946 B2Grant Prideco, L.P.
- Long-life drill bit with downhole self-renewal capability11 Aug 2026US 12,704,025 B2Southwest Petroleum University
- Earth-boring tools including cutting elements having different characteristics in different regions of the earth-boring tools10 Sep 2026US 2026/0266140 A1Baker Hughes Oilfield Operations LLC
- Drill bit3 Sep 2026US 2026/0258705 A1Zerdalab Ltd.
- 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
- Drill bit design and drilling operation control workflow for mitigating torque oscillations30 Jul 2026US 2026/0218597 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Stability enhanced drill bit and cutting structure having zones of varying wear resistance195US 5,607,024 ASmith International, Inc. · 1997
- Drilling assembly and method of drilling for unstable and depleted formations187US 5,957,225 ABP Amoco Corporation · 1999
- Diamond drag bit for soft formations154US 4,981,184 ASmith International, Inc. · 1991
- Bi-center and bit method for enhancing stability133US 5,678,644 ADiamond Products International, Inc. · 1997
- Cutter head, drill bit and similar drilling tools129US 4,200,159 AChristensen, Inc. · 1980