E21B 10/605
The bit being a core-bit
Official title: {the bit being a core-bit}
E21B10/605 (The bit being a core-bit) appears on 43 US grants and 32 published applications in this corpus.
Search patents in E21B- Granted patents
- 43
- Published applications
- 32
- Assignees
- 25
- Inventors
- 85
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 5 |
| 2016 | 1 | 2 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 2 | 2 |
| 2020 | 2 | 1 |
| 2021 | 3 | 1 |
| 2022 | 0 | 5 |
| 2023 | 4 | 2 |
| 2024 | 3 | 2 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Rapid assembly and automatic sampling drilling tool for frozen soil layer exploration7 Oct 2025US 12,435,588 B2Powerchina Huadong Engineering Corporation Limited
- Continuous sampling drill bit23 Sep 2025US 12,421,804 B2Veracio Ltd.
- Sidewall coring tool systems and methods8 Jul 2025US 12,352,161 B2Schlumberger Technology Corporation
- Sidewall coring tool systems and methods16 Jul 2024US 12,037,900 B2Schlumberger Technology Corporation
- Sidewall coring tool systems and methods11 Jun 2024US 12,006,820 B2Schlumberger Technology Corporation
- Continuous Sampling Drill Bit30 Oct 2025US 2025/0334007 A1Veracio Ltd.
- Rapid assembly and automatic sampling drilling tool for frozen soil layer exploration14 Aug 2025US 2025/0257624 A1Powerchina Huadong Engineering Corporation Limited
- Sidewall coring tool systems and methods29 Aug 2024US 2024/0287900 A1Schlumberger Technology Corporation
- Continuous Sampling Drill Bit4 Jan 2024US 2024/0003192 A1Longyear TM, Inc.
- Continuous sampling drill bit9 Nov 2023US 2023/0358103 A1Veracio Ltd.
Most cited
By later US patents
- Combination drill bit328US 5,016,718 A1991
- Rotary drill bit96US 4,640,374 AStrata Bit Corporation · 1987
- Rotary drill bit95US 4,538,691 AStrata Bit Corporation · 1985
- Combination drill bit74US 5,176,212 A1993
- Kerf-cutting apparatus and method for improved drilling rates48US 4,892,159 AExxon Production Research Company · 1990