E21B 10/48
The bit being of core type
Official title: the bit being of core type
E21B10/48 (The bit being of core type) appears on 134 US grants and 91 published applications in this corpus.
Search patents in E21B- Granted patents
- 134
- Published applications
- 91
- Assignees
- 58
- Inventors
- 205
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 6 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 5 |
| 2010 | 2 | 5 |
| 2011 | 4 | 8 |
| 2012 | 5 | 3 |
| 2013 | 3 | 6 |
| 2014 | 4 | 7 |
| 2015 | 4 | 9 |
| 2016 | 11 | 6 |
| 2017 | 7 | 3 |
| 2018 | 3 | 8 |
| 2019 | 6 | 5 |
| 2020 | 8 | 3 |
| 2021 | 6 | 4 |
| 2022 | 3 | 2 |
| 2023 | 2 | 5 |
| 2024 | 3 | 3 |
| 2025 | 2 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Polycrystalline diamond compact table with polycrystalline diamond extensions therefrom23 Jun 2026US 12,662,382 B2Sf Diamond Co., Ltd.
- Downhole rock mechanics characterisation tool, assembly and method20 Jan 2026US 12,529,309 B2ENI S. p. A.
- 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
- Polycrystalline diamond compact table with polycrystalline diamond extensions therefrom17 Dec 2024US 12,168,608 B2Sf Diamond Co., Ltd.
- Continuous Sampling Drill Bit30 Oct 2025US 2025/0334007 A1Veracio Ltd.
- Polycrystalline Diamond Compact Table with Polycrystalline Diamond Extensions Therefrom3 Apr 2025US 2025/0109025 A1Sf Diamond Co., Ltd.
- Polycrystalline Diamond Compact Table with Polycrystalline Diamond Extensions Therefrom13 Feb 2025US 2025/0051170 A1Sf Diamond Co., Ltd.
- Sidewall coring tool systems and methods29 Aug 2024US 2024/0287900 A1Schlumberger Technology Corporation
- Tool with a base element and studs provided thereon and use of such tool for forming secant walls7 Mar 2024US 2024/0076941 A1Proferro NV
Most cited
By later US patents
- Combination drill bit328US 5,016,718 A1991
- Drill bit162US 4,128,136 ALamage Limited · 1978
- Drill bit148US 4,373,593 AChristensen, Inc. · 1983
- Self-centering polycrystalline diamond cutting rock bit135US 5,655,614 ASmith International, Inc. · 1997
- Rotary drill bit and method for making same130US 4,098,362 AGeneral Electric Company · 1978