E21B 10/64
Drill bits: characterised by the whole or part thereof being insertable into
Official title: characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
E21B10/64 (Drill bits: characterised by the whole or part thereof being insertable into) appears on 161 US grants and 106 published applications in this corpus.
Search patents in E21B- Granted patents
- 161
- Published applications
- 106
- Assignees
- 68
- Inventors
- 220
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 1 | 10 |
| 2005 | 0 | 4 |
| 2006 | 9 | 8 |
| 2007 | 6 | 8 |
| 2008 | 3 | 1 |
| 2009 | 6 | 14 |
| 2010 | 10 | 5 |
| 2011 | 7 | 5 |
| 2012 | 3 | 2 |
| 2013 | 4 | 4 |
| 2014 | 4 | 3 |
| 2015 | 2 | 5 |
| 2016 | 7 | 7 |
| 2017 | 1 | 3 |
| 2018 | 6 | 9 |
| 2019 | 5 | 0 |
| 2020 | 3 | 2 |
| 2021 | 2 | 3 |
| 2022 | 3 | 4 |
| 2023 | 1 | 3 |
| 2024 | 4 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Splined/grooved 2 piece bit assembly16 Jun 2026US 12,655,693 B2Halliburton Energy Services.Inc.
- Two-part drilling and running tool27 May 2025US 12,312,869 B2Halliburton Energy Services.Inc.
- Splined/grooved 2 piece bit assembly4 Mar 2025US 12,241,311 B2Halliburton Energy Services.Inc.
- Drilling unit16 Apr 2024US 11,959,337 B2Mincon Nordic Oy
- Drive sub for a drilling assembly23 Jan 2024US 11,879,298 B2Reflex Instruments Asia Pacific Pty Ltd
- Reamer for horizontal directional drilling18 Jun 2026US 2026/0168332 A1Michels Corporation
- Splined/grooved 2 piece bit assembly30 Apr 2026US 2026/0117594 A1Halliburton Energy Services.Inc.
- Drill bit and method for drilling hole for pipe to be installed in ground28 Aug 2025US 2025/0270881 A1Mincon Nordic Oy
- Two-part drilling and running tool28 Aug 2025US 2025/0270883 A1Halliburton Energy Services.Inc.
- Splined/grooved 2 piece bit assembly12 Dec 2024US 2024/0410230 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Bit for subterranean drilling fabricated from separately-formed major components380US 5,560,440 ABaker Hughes Incorporated · 1996
- Drilling with casing and retrievable drill bit314US 5,271,472 AAtlantic Richfield Company · 1993
- Drilling with casing and retrievable drill bit289US 5,197,553 AAtlantic Richfield Company · 1993
- Expandable gage bit for drilling and method of drilling271US 5,361,859 ABaker Hughes Incorporated · 1994
- Drilling with casing and retrievable bit-motor assembly249US 5,472,057 AAtlantic Richfield Company · 1995