E21B 10/25
Characterised by sealing details
Official title: characterised by sealing details
E21B10/25 (Characterised by sealing details) appears on 294 US grants and 152 published applications in this corpus.
Search patents in E21B- Granted patents
- 294
- Published applications
- 152
- Assignees
- 71
- Inventors
- 357
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 11 | 0 |
| 1981 | 19 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 10 | 0 |
| 1986 | 10 | 0 |
| 1987 | 3 | 0 |
| 1988 | 8 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 13 | 0 |
| 2002 | 6 | 4 |
| 2003 | 4 | 7 |
| 2004 | 7 | 5 |
| 2005 | 2 | 9 |
| 2006 | 9 | 10 |
| 2007 | 8 | 7 |
| 2008 | 6 | 6 |
| 2009 | 2 | 8 |
| 2010 | 6 | 11 |
| 2011 | 4 | 9 |
| 2012 | 3 | 6 |
| 2013 | 6 | 7 |
| 2014 | 6 | 10 |
| 2015 | 8 | 7 |
| 2016 | 5 | 10 |
| 2017 | 3 | 4 |
| 2018 | 8 | 7 |
| 2019 | 12 | 8 |
| 2020 | 9 | 4 |
| 2021 | 6 | 5 |
| 2022 | 1 | 0 |
| 2023 | 2 | 3 |
| 2024 | 4 | 3 |
| 2025 | 3 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Shank adapter, rock drilling machine and method29 Jul 2025US 12,371,952 B2Sandvik Mining and Construction Oy
- Retainer for rotary cone drill bit13 May 2025US 12,297,698 B2Caterpillar Inc.
- Protected back-up rings for metal face seals and earth boring tools incorporating the same7 Jan 2025US 12,188,300 B2Baker Hughes Oilfield Operations LLC
- Hybrid bit20 Aug 2024US 12,065,883 B2Schlumberger Technology Corporation
- Roller cutting tool with improved sealing2 Jul 2024US 12,024,951 B2Sandvik Mining and Construction Tools AB
- Pdc-roller hybrid drill bit6 Aug 2026US 2026/0226798 A1China Petroleum & Chemical Corporation
- Retainer for rotary cone drill bit30 Jan 2025US 2025/0034948 A1Caterpillar Inc.
- Protected back-up rings for metal face seals and earth boring tools incorporating the same26 Sep 2024US 2024/0318506 A1Baker Hughes Oilfield Operations LLC
- 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
Most cited
By later US patents
- Rotary drill bit with improved cutter and seal protection130US 5,452,771 ADresser Industries, Inc. · 1995
- Self-lubricating elastomeric seal with polarized graphite126US 6,789,634 B1Smith International, Inc. · 2004
- Rotary drill bit with improved cutter and seal protection122US 5,518,077 ADresser Industries, Inc. · 1996
- Hydrodynamic lubricant seal for drill bits94US 4,610,319 A1986
- Drill bit having an improved seal and lubrication method using same90US 7,013,998 B2Halliburton Energy Services.Inc. · 2006