E21B 7/021
With a rotary table, i.e. a fixed rotary drive for a relatively
Official title: {With a rotary table, i.e. a fixed rotary drive for a relatively advancing tool}
E21B7/021 (With a rotary table, i.e. a fixed rotary drive for a relatively) appears on 40 US grants and 29 published applications in this corpus.
Search patents in E21B- Granted patents
- 40
- Published applications
- 29
- Assignees
- 28
- Inventors
- 68
- Latest grant
- 19 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 3 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 3 |
| 2017 | 1 | 2 |
| 2018 | 0 | 1 |
| 2019 | 3 | 3 |
| 2020 | 2 | 5 |
| 2021 | 1 | 2 |
| 2022 | 7 | 3 |
| 2023 | 3 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Drilling machine for foundation piles comprising an electric energy recovery winch3 Oct 2023US 11,773,651 B2
- Drilling apparatus and related method15 Aug 2023US 11,725,457 B2Watson, Incorporated
- Robotic apparatus for performing drill floor operations18 Jul 2023US 11,702,894 B2Noble Drilling A/S
- Working machine and method for working the ground18 Oct 2022US 11,473,375 B2BAUER Maschinen GmbH
- Drilling arrangement and methodology29 Jan 2026US 2026/0028879 A1
- Drilling apparatus and related method3 Nov 2022US 2022/0349258 A1Watson, Incorporated
- High-capacity mast on a drilling rig3 Nov 2022US 2022/0349268 A1Nabors Drilling Technologies USA, Inc.
- Robotic apparatus for performing drill floor operations21 Apr 2022US 2022/0120146 A1Maersk Drilling A/S
- Drilling apparatus and related method9 Sep 2021US 2021/0277720 A1Watson, Incorporated
Most cited
By later US patents
- Coiled tubing drilling rig52US 6,502,641 B1Precision Drilling Corporation · 2003
- Mobile machine for subterranean installation of piping and the like25US 4,475,604 AThe Charles Machine Works, Inc. · 1984
- Mobile boring rig21US 5,269,107 AIng. Guenter Klemm Bohrtechnik GmbH · 1993
- Hydraulically driven kelly crowd20US 4,137,974 ASmith International, Inc. · 1979
- Portable earth drilling apparatus19US 4,020,909 A1977