E21B 19/18
Connecting or disconnecting drill bit and drilling pipe
E21B19/18 (Connecting or disconnecting drill bit and drilling pipe) appears on 75 US grants and 76 published applications in this corpus.
Search patents in E21B- Granted patents
- 75
- Published applications
- 76
- Assignees
- 57
- Inventors
- 178
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 3 |
| 2007 | 2 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 3 | 0 |
| 2014 | 0 | 2 |
| 2015 | 3 | 7 |
| 2016 | 1 | 2 |
| 2017 | 2 | 8 |
| 2018 | 3 | 3 |
| 2019 | 8 | 4 |
| 2020 | 4 | 6 |
| 2021 | 3 | 8 |
| 2022 | 7 | 3 |
| 2023 | 2 | 2 |
| 2024 | 4 | 7 |
| 2025 | 8 | 5 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for moving tubular rotary slips25 Aug 2026US 12,716,301 B2Helmerich & Payne, Inc.
- Drilling tool changer device and a method for making the change25 Aug 2026US 12,716,303 B2
- Automatic drill bit changing magazine28 Apr 2026US 12,612,830 B1Caterpillar Inc.
- Drilling tool changer device and a method for making the change16 Dec 2025US 12,497,846 B2
- Drilling tool changer apparatus2 Sep 2025US 12,404,731 B2Epiroc Drilling Solutions, LLC
- Automated bit handling and changing system and process6 Aug 2026US 2026/0226804 A1Sandvik Mining and Construction USA, LLC
- Flexible coupling arrangement for directional drilling system2 Apr 2026US 2026/0092504 A1
- Table bushing lifting ring26 Mar 2026US 2026/0085586 A1Sandvik Mining and Construction USA, LLC
- Drilling tool changer device and a method for making the change12 Mar 2026US 2026/0071506 A1
- Automated bit handling and changing system and process19 Feb 2026US 2026/0049530 A1Sandvik Mining and Construction USA, LLC
Most cited
By later US patents
- Side hole drilling in boreholes78US 4,226,288 ACalifornia Institute of Technology · 1980
- Tubular connect/disconnect apparatus34US 7,188,547 B1Varco I/P, Inc. · 2007
- Pivoting pipe handler for off-line make up of drill pipe joints33US 7,228,919 B2National-Oilwell, L. P. · 2007
- Bit breakers, bits, systems, and methods with improved makeup/breakout engagement28US 6,311,789 B1Halliburton Energy Services.Inc. · 2001
- Bit breaker24US 4,495,840 AReed Rock Bit Company · 1985