E21B 10/23
With drilling fluid supply to the bearings
Official title: with drilling fluid supply to the bearings
E21B10/23 (With drilling fluid supply to the bearings) appears on 51 US grants and 22 published applications in this corpus.
Search patents in E21B- Granted patents
- 51
- Published applications
- 22
- Assignees
- 24
- Inventors
- 76
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 2 | 1 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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.
- Shank adapter, rock drilling machine and method29 Jul 2025US 12,371,952 B2Sandvik Mining and Construction Oy
- Dual function pressure compensator for a lubricant reservoir of a sealed rock bit12 Oct 2021US 11,142,958 B1
- Coated surfaces for bearings used in drilling motors5 Jan 2021US 10,883,311 B2Aktiebolaget Skf
- By-pass fluid passageway for drill tool21 Apr 2020US 10,626,677 B2Sandvik Intellectual Property AB
- Bearing assembly with flow restrictor for a dual rod directional drilling apparatus and method of use3 Jul 2025US 2025/0215751 A1Hunting Energy Services, Inc.
- Shank adapter, rock drilling machine and method11 Jul 2024US 2024/0229571 A9Sandvik Mining and Construction Oy
- Shank adapter, rock drilling machine and method25 Apr 2024US 2024/0133247 A1Sandvik Mining and Construction Oy
- Floating Plug Anti-Leak17 Sep 2020US 2020/0291725 A1Halliburton Energy Services.Inc.
- Coated surfaces for bearings used in drilling motors18 Jul 2019US 2019/0218861 A1Aktiebolaget Skf
Most cited
By later US patents
- Cone mouth debris exclusion shield51US 4,688,651 ADresser Industries, Inc. · 1987
- Jet dual bit44US 4,293,048 ASmith International, Inc. · 1981
- Enlarged bore hole drilling method38US 4,219,087 ATri-State Oil Tool Industries, Inc. · 1980
- Sealed lubricated and air cooled rock bit bearing38US 4,386,668 AHughes Tool Company · 1983
- Cooling a drilling tool component with a separate flow stream of reduced-temperature gaseous drilling fluid34US 4,287,957 A1981