E21B 7/002
Drilling with diversely driven shafts extending into the borehole
Official title: {Drilling with diversely driven shafts extending into the borehole ( E21B7/001 takes precedence)}
E21B7/002 (Drilling with diversely driven shafts extending into the borehole) appears on 106 US grants and 86 published applications in this corpus.
Search patents in E21B- Granted patents
- 106
- Published applications
- 86
- Assignees
- 54
- Inventors
- 190
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 2 |
| 2002 | 6 | 3 |
| 2003 | 2 | 3 |
| 2004 | 2 | 5 |
| 2005 | 3 | 3 |
| 2006 | 5 | 1 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 3 |
| 2011 | 1 | 1 |
| 2012 | 2 | 3 |
| 2013 | 1 | 5 |
| 2014 | 1 | 6 |
| 2015 | 3 | 2 |
| 2016 | 6 | 6 |
| 2017 | 5 | 2 |
| 2018 | 5 | 5 |
| 2019 | 5 | 5 |
| 2020 | 5 | 7 |
| 2021 | 6 | 7 |
| 2022 | 3 | 7 |
| 2023 | 5 | 1 |
| 2024 | 5 | 2 |
| 2025 | 2 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus for capturing axial force on an inner drive member5 May 2026US 12,618,289 B2The Charles Machine Works, Inc.
- Drilling assembly14 Apr 2026US 12,601,223 B2BAUER Spezialtiefbau GmbH
- Apparatus for capturing axial force on an inner drive member4 Feb 2025US 12,215,586 B2The Charles Machine Works, Inc.
- Hydraulic fracturing and cutting cooperative device suitable for hard rock and use method thereof7 Jan 2025US 12,188,339 B2China University of Mining and Technology
- High pressure injection flushing heads and systems including such flushing heads12 Nov 2024US 12,139,978 B2Boart Longyear Company
- Reamer for horizontal directional drilling18 Jun 2026US 2026/0168332 A1Michels Corporation
- Drill drive arrangement4 Dec 2025US 2025/0369286 A1EURODRILL GmbH
- Drilling assembly6 Nov 2025US 2025/0341132 A1BAUER Spezialtiefbau GmbH
- Apparatus for capturing axial force on an inner drive member5 Jun 2025US 2025/0179875 A1The Charles Machine Works, Inc.
- Hydraulic fracturing and cutting cooperative device suitable for hard rock and use method thereof28 Nov 2024US 2024/0392669 A1China University of Mining and Technology
Most cited
By later US patents
- Subsea wellbore drilling system for reducing bottom hole pressure97US 6,415,877 B1Deep Vision Inc. · 2002
- Multiple lateral hydraulic drilling apparatus and method77US 6,206,112 B1Petrolphysics Partners LP · 2001
- Directional boring head with deflection shoe and method of boring74US 5,490,569 AThe Charles Machine Works, Inc. · 1996
- Subsea wellbore drilling system for reducing bottom hole pressure64US 6,648,081 B2Deep Vision Inc. · 2003
- Control systems and methods for active controlled bottomhole pressure systems61US 7,174,975 B2Baker Hughes Incorporated · 2007