E21B 3/04
Rotary tables
E21B3/04 (Rotary tables) appears on 172 US grants and 113 published applications in this corpus.
Search patents in E21B- Granted patents
- 172
- Published applications
- 113
- Assignees
- 85
- Inventors
- 286
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 1 | 4 |
| 2006 | 6 | 1 |
| 2007 | 0 | 2 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 5 |
| 2014 | 2 | 7 |
| 2015 | 1 | 7 |
| 2016 | 3 | 13 |
| 2017 | 11 | 11 |
| 2018 | 10 | 12 |
| 2019 | 17 | 13 |
| 2020 | 16 | 9 |
| 2021 | 7 | 3 |
| 2022 | 11 | 3 |
| 2023 | 2 | 1 |
| 2024 | 5 | 4 |
| 2025 | 5 | 5 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adjustable gas spring tuned mass damper12 May 2026US 12,624,629 B2Baker Hughes Oilfield Operations LLC
- Tall flange rubber adapter11 Nov 2025US 12,467,333 B1Pruitt Tool & Supply Co.
- Drill pipe tally system28 Oct 2025US 12,454,868 B2Magnetic Variation Services, LLC
- Method and apparatus for operating hydraulic equipment through a rotary table11 Mar 2025US 12,247,451 B2Consolidated Rig Works, L.P.
- Autocentric self-aligning tubing hanger deployment tool4 Mar 2025US 12,241,328 B1Saudi Arabian Oil Company
- Rotary drives for civil engineering1 Oct 2026US 2026/0298029 A1BAUER Maschinen GmbH
- Drill drive arrangement, multiple rotary drive arrangement, and drilling rig for civil engineering, as well as method for operating a drill drive arrangement for civil engineering1 Oct 2026US 2026/0298030 A1BAUER Maschinen GmbH
- Block velocity determination system and methods29 Jan 2026US 2026/0028887 A1Magnetic Variation Services, LLC
- Connector assembly for use with microtunneling apparatus27 Nov 2025US 2025/0361777 A1
- Portable Downforce System and Method5 Jun 2025US 2025/0179884 A1Treeline Well Services LP
Most cited
By later US patents
- Wellbore circulation system136US 6,412,554 B1Weatherford/Lamb, Inc. · 2002
- Drilling head99US 4,480,703 ASmith International, Inc. · 1984
- Combined drilling apparatus and method98US 6,158,516 ACudd Pressure Control, Inc. · 2000
- Method of rotating a tubular member93US 5,746,276 AEckel Manufacturing Company, Inc. · 1998
- Tong for wellbore operations90US 6,668,684 B2Weatherford/Lamb, Inc. · 2003