E21B 10/22
Characterised by bearing, lubrication or sealing details
Official title: characterised by bearing, lubrication or sealing details
E21B10/22 (Characterised by bearing, lubrication or sealing details) appears on 744 US grants and 319 published applications in this corpus.
Search patents in E21B- Granted patents
- 744
- Published applications
- 319
- Assignees
- 152
- Inventors
- 774
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 19 | 0 |
| 1978 | 13 | 0 |
| 1979 | 17 | 0 |
| 1980 | 33 | 0 |
| 1981 | 48 | 0 |
| 1982 | 12 | 0 |
| 1983 | 23 | 0 |
| 1984 | 25 | 0 |
| 1985 | 36 | 0 |
| 1986 | 32 | 0 |
| 1987 | 17 | 0 |
| 1988 | 26 | 0 |
| 1989 | 17 | 0 |
| 1990 | 10 | 0 |
| 1991 | 15 | 0 |
| 1992 | 10 | 0 |
| 1993 | 9 | 0 |
| 1994 | 10 | 0 |
| 1995 | 12 | 0 |
| 1996 | 14 | 0 |
| 1997 | 8 | 0 |
| 1998 | 9 | 0 |
| 1999 | 12 | 0 |
| 2000 | 13 | 0 |
| 2001 | 21 | 4 |
| 2002 | 14 | 8 |
| 2003 | 11 | 10 |
| 2004 | 12 | 9 |
| 2005 | 3 | 14 |
| 2006 | 12 | 14 |
| 2007 | 12 | 14 |
| 2008 | 11 | 22 |
| 2009 | 7 | 19 |
| 2010 | 9 | 20 |
| 2011 | 12 | 19 |
| 2012 | 6 | 13 |
| 2013 | 15 | 15 |
| 2014 | 11 | 18 |
| 2015 | 13 | 15 |
| 2016 | 14 | 23 |
| 2017 | 7 | 11 |
| 2018 | 16 | 13 |
| 2019 | 20 | 17 |
| 2020 | 14 | 13 |
| 2021 | 13 | 10 |
| 2022 | 7 | 3 |
| 2023 | 5 | 4 |
| 2024 | 8 | 5 |
| 2025 | 7 | 5 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Bearing assembly with flow restrictor for a dual rod directional drilling apparatus and method of use28 Jul 2026US 12,692,750 B2Hunting Energy Services, Inc.
- Method of thermal assembly of leg-cone assemblies into a rotating cone drill bit body16 Dec 2025US 12,497,840 B1Salvation Drilling Tools, LLC
- Bearing assemblies, bearing apparatuses, and related methods4 Nov 2025US 12,460,674 B2US Synthetic Corporation
- Bearing materials for tricone bit rolling elements21 Oct 2025US 12,448,850 B2Caterpillar Inc.
- Earth-boring tool geometry and associated apparatus and methods19 Aug 2025US 12,392,199 B2
- Pdc-roller hybrid drill bit6 Aug 2026US 2026/0226798 A1China Petroleum & Chemical Corporation
- Bearing assembly with flow restrictor for a dual rod directional drilling apparatus and method of use3 Jul 2025US 2025/0215751 A1Hunting Energy Services, Inc.
- Retainer for rotary cone drill bit30 Jan 2025US 2025/0034948 A1Caterpillar Inc.
- Conduits for feeding air to small bearings of journal area of rotary drill bit30 Jan 2025US 2025/0034949 A1Caterpillar Inc.
- Grease with nanoparticles for tricone bits30 Jan 2025US 2025/0034950 A1Caterpillar Inc.
Most cited
By later US patents
- Composite polycrystalline diamond compact502US 4,604,106 ASmith International, Inc. · 1986
- Polycrystalline diamond bearing system for a roller cone rock bit395US 4,738,322 ASmith International, Inc. · 1988
- Composite polycrystalline diamond209US 4,525,178 AMegadiamond Industries, Inc. · 1985
- Transistion layer polycrystalline diamond bearing208US 4,729,440 ASmith International, Inc. · 1988
- Polycrystalline diamond bearing system for a roller cone rock bit202US 4,802,539 ASmith International, Inc. · 1989