E21B 6/06
The rotation being intermittent
Official title: the rotation being intermittent, e.g. obtained by ratchet device
E21B6/06 (The rotation being intermittent) appears on 39 US grants and 24 published applications in this corpus.
Search patents in E21B- Granted patents
- 39
- Published applications
- 24
- Assignees
- 29
- Inventors
- 81
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 2 | 3 |
| 2006 | 3 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 3 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 2 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 3 | 2 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- State self-adaptive turbine type pulse generator and downhole drilling tool25 Nov 2025US 12,480,365 B2China Petroleum & Chemical Corporation
- Device for generating oscillations for a construction machine and method of operation25 Mar 2025US 12,258,861 B2EURODRILL GmbH
- Bottom-hole impact-rotation stepping combined unloading rock-breaking efficient drilling system and method thereof7 May 2024US 11,976,554 B2China University of Petroleum (East China)
- Multipurpose drill system16 Apr 2024US 11,959,381 B2Intelligent Drilling Applications & Technology Pty Ltd
- Non-destructive testing device customization2 Apr 2024US 11,946,371 B2Baker Hughes Oilfield Operations LLC
- State self-adaptive turbine type pulse generator and downhole drilling tool20 Mar 2025US 2025/0092740 A1China Petroleum & Chemical Corporation
- Device for generating oscillations for a construction machine and method of operation24 Oct 2024US 2024/0352797 A1EURODRILL GmbH
- Bottom-hole impact-rotation stepping combined unloading rock-breaking efficient drilling system and method thereof14 Mar 2024US 2024/0084646 A1China University of Petroleum (East China)
- Non-destructive testing device customization25 Nov 2021US 2021/0363827 A1Baker Hughes Oilfield Operations LLC
- Multipurpose drill system26 Nov 2020US 2020/0370374 A1Intelligent Drilling Applications & Technology Pty Ltd
Most cited
By later US patents
- Hammer for use in a bore hole and apparatus for use therewith38US 4,705,118 A1987
- Using a rotating inner member to drive a tool in a hollow outer member35US 6,739,413 B2The Charles Machine Works, Inc. · 2004
- Downhole tool27US 7,073,610 B2Rotech Holdings Limited · 2006
- Using a rotating inner member to drive a tool in a hollow outer member19US 7,025,152 B2The Charles Machine Works, Inc. · 2006
- Nonrotary piston for jackhammer and removable splined nut therefor15US 5,350,025 AIngersoll-Rand Company · 1994