E21B 10/50
The bit being of roller type
Official title: the bit being of roller type
E21B10/50 (The bit being of roller type) appears on 577 US grants and 323 published applications in this corpus.
Search patents in E21B- Granted patents
- 577
- Published applications
- 323
- Assignees
- 96
- Inventors
- 626
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 8 | 0 |
| 1981 | 8 | 0 |
| 1982 | 10 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 10 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 10 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 5 | 0 |
| 1994 | 21 | 0 |
| 1995 | 17 | 0 |
| 1996 | 10 | 0 |
| 1997 | 14 | 0 |
| 1998 | 26 | 0 |
| 1999 | 18 | 0 |
| 2000 | 17 | 0 |
| 2001 | 18 | 7 |
| 2002 | 15 | 15 |
| 2003 | 20 | 16 |
| 2004 | 12 | 15 |
| 2005 | 10 | 16 |
| 2006 | 17 | 18 |
| 2007 | 10 | 12 |
| 2008 | 10 | 18 |
| 2009 | 10 | 8 |
| 2010 | 17 | 19 |
| 2011 | 10 | 13 |
| 2012 | 6 | 13 |
| 2013 | 11 | 18 |
| 2014 | 13 | 16 |
| 2015 | 13 | 11 |
| 2016 | 22 | 21 |
| 2017 | 10 | 17 |
| 2018 | 17 | 14 |
| 2019 | 18 | 11 |
| 2020 | 14 | 8 |
| 2021 | 19 | 6 |
| 2022 | 5 | 12 |
| 2023 | 3 | 6 |
| 2024 | 14 | 5 |
| 2025 | 5 | 4 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Non-uniform roller cone14 Jul 2026US 12,680,393 B2Schlumberger Technology Corporation
- Polycrystalline diamond and methods for fabricating the same14 Jul 2026US 12,680,395 B2US Synthetic Corporation
- Polycrystalline diamond compact table with polycrystalline diamond extensions therefrom23 Jun 2026US 12,662,382 B2Sf Diamond Co., Ltd.
- Cutting insert assemblies and related systems and methods2 Dec 2025US 12,486,722 B2US Synthetic Corporation
- Method of handling slides7 Oct 2025US 12,435,574 B2Mikroscan Technologies
- Diamond drill bit with self-adaptive cushioning module20 Aug 2026US 2026/0243135 A1Chengdu Weiyi Petroleum Technology Co., Ltd.
- Pdc-roller hybrid drill bit6 Aug 2026US 2026/0226798 A1China Petroleum & Chemical Corporation
- Cutting element and methods of making same5 Feb 2026US 2026/0036002 A1Element Six (UK) Limited
- Apparatus for handling slides22 Jan 2026US 2026/0021489 A1Mikroscan Technologies
- Non-uniform roller cone28 Aug 2025US 2025/0270882 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Drill bit arcuate-shaped inserts with cutting edges and method of manufacture391US 7,331,410 B2Smith International, Inc. · 2008
- Rock bits and inserts therefor390US 4,811,801 ASmith International, Inc. · 1989
- Wellbore milling and drilling190US 5,887,655 AWeatherford/Lamb, Inc. · 1999
- Double cemented carbide composites169US 5,880,382 ASmith International, Inc. · 1999
- Surface geometry for non-planar drill inserts168US 6,196,340 B1US Synthetic Corporation · 2001