E21B 3/025
With a to-and-fro rotation of the tool
Official title: with a to-and-fro rotation of the tool
E21B3/025 (With a to-and-fro rotation of the tool) appears on 33 US grants and 23 published applications in this corpus.
Search patents in E21B- Granted patents
- 33
- Published applications
- 23
- Assignees
- 31
- Inventors
- 77
- Latest grant
- 14 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 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 0 |
| 2019 | 0 | 2 |
| 2020 | 4 | 5 |
| 2021 | 1 | 5 |
| 2022 | 5 | 2 |
| 2023 | 4 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wellbore friction depth sounding by oscillating a drill string or casing14 Oct 2025US 12,442,287 B2Magnetic Variation Services, LLC
- Arrangement of a ground drilling device, method for operating a ground drilling device and use of an arrangement of a ground drilling device5 Dec 2023US 11,834,921 B2TRACTO-TECHNIK GmbH & Co. KG
- Wellbore friction depth sounding by oscillating a drill string or casing3 Oct 2023US 11,773,711 B2Magnetic Variation Services, LLC
- Inertial compensation for a quill oscillator26 Sep 2023US 11,767,749 B2Ensign Drilling Inc.
- Variable-length axial linkage for tubular running tools24 Jan 2023US 11,560,761 B2Noetic Technologies Inc.
- Apparatus and a method of drilling holes2 Apr 2026US 2026/0092502 A1Golf & Machines Aps
- Methods and systems for wellbore friction profile15 Jan 2026US 2026/0015934 A1Magnetic Variation Services, LLC
- Wellbore friction depth sounding by oscillating a drill string or casing21 Dec 2023US 2023/0407739 A1Magnetic Variation Services, LLC
- Variable-length axial linkage for tubular running tools6 Oct 2022US 2022/0316284 A1Noetic Technologies Inc.
- Arrangement of a ground drilling device, method for operating a ground drilling device and use of an arrangement of a ground drilling device4 Aug 2022US 2022/0243533 A1TRACTO-TECHNIK GmbH & Co. KG
Most cited
By later US patents
- Drilling and/or lifting machine35US 4,703,811 A1987
- Directional drilling control30US 7,461,705 B2Varco I/P, Inc. · 2008
- Drilling apparatus15US 5,092,411 ARudolf Hausherr & Sohne GmbH & Co. KG · 1992
- Pile driver, pile drawer and/or drilling machine14US 4,785,892 A1988
- System for directional boring including a drilling head with overrunning clutch and method of boring14US 7,641,000 B2Vermeer Manufacturing Company · 2010