E21B 10/62
Drill bits: characterised by parts
Official title: characterised by parts, e.g. cutting elements, which are detachable or adjustable (E21B10/64 takes precedence; for roller bits E21B10/20; for augers E21B10/44)
E21B10/62 (Drill bits: characterised by parts) appears on 776 US grants and 680 published applications in this corpus.
Search patents in E21B- Granted patents
- 776
- Published applications
- 680
- Assignees
- 207
- Inventors
- 1,060
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 8 | 0 |
| 1982 | 10 | 0 |
| 1983 | 14 | 0 |
| 1984 | 11 | 0 |
| 1985 | 10 | 0 |
| 1986 | 8 | 0 |
| 1987 | 11 | 0 |
| 1988 | 7 | 0 |
| 1989 | 11 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 9 | 0 |
| 1995 | 6 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 7 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 0 |
| 2002 | 7 | 5 |
| 2003 | 1 | 3 |
| 2004 | 2 | 13 |
| 2005 | 8 | 5 |
| 2006 | 3 | 13 |
| 2007 | 14 | 25 |
| 2008 | 15 | 33 |
| 2009 | 11 | 29 |
| 2010 | 29 | 37 |
| 2011 | 34 | 34 |
| 2012 | 29 | 35 |
| 2013 | 22 | 25 |
| 2014 | 28 | 36 |
| 2015 | 32 | 44 |
| 2016 | 33 | 31 |
| 2017 | 25 | 43 |
| 2018 | 46 | 40 |
| 2019 | 46 | 47 |
| 2020 | 52 | 31 |
| 2021 | 27 | 33 |
| 2022 | 37 | 32 |
| 2023 | 23 | 28 |
| 2024 | 32 | 29 |
| 2025 | 30 | 13 |
| 2026 | 17 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Underground directional drilling apparatus22 Sep 2026US 12,742,358 B1Melfred Borzall, Inc.
- 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
- Refreshable polycrystalline diamond compact (PDC) drill bits23 Jun 2026US 12,662,885 B2Saudi Arabian Oil Company
- Splined/grooved 2 piece bit assembly16 Jun 2026US 12,655,693 B2Halliburton Energy Services.Inc.
- Downhole tool and a bit for such downhole tool8 Oct 2026US 2026/0308987 A1Welltec A/S
- Underground directional drilling apparatus24 Sep 2026US 2026/0286786 A1Melfred Borzall, Inc.
- Drill bit3 Sep 2026US 2026/0258705 A1Zerdalab Ltd.
- Fixed cutter drill bits including cutter elements with high abrasion resistant polycrystalline diamond segments27 Aug 2026US 2026/0251020 A1Grant Prideco, L.P.
- Drill bits for drilling subterranean boreholes and mechanically locked cutter elements for same6 Aug 2026US 2026/0226799 A1National Oilwell Varco, L. P.
Most cited
By later US patents
- Bit for subterranean drilling fabricated from separately-formed major components380US 5,560,440 ABaker Hughes Incorporated · 1996
- Mosaic diamond drag bit cutter having a nonuniform wear pattern197US 5,238,074 ABaker Hughes Incorporated · 1993
- Combination mill and drill bit197US 6,131,675 ABaker Hughes Incorporated · 2000
- Pilot casing mill189US 5,027,914 A1991
- Cutting and drilling apparatus with threadably attached compacts176US 4,199,035 AGeneral Electric Company · 1980