E21B 15/02
Supports for the drilling machine: specially adapted for underwater drilling
Official title: specially adapted for underwater drilling (E21B15/04 takes precedence)
E21B15/02 (Supports for the drilling machine: specially adapted for underwater drilling) appears on 208 US grants and 222 published applications in this corpus.
Search patents in E21B- Granted patents
- 208
- Published applications
- 222
- Assignees
- 119
- Inventors
- 347
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 1 |
| 2002 | 6 | 6 |
| 2003 | 2 | 2 |
| 2004 | 3 | 1 |
| 2005 | 3 | 4 |
| 2006 | 1 | 2 |
| 2007 | 0 | 2 |
| 2008 | 2 | 5 |
| 2009 | 3 | 6 |
| 2010 | 3 | 8 |
| 2011 | 1 | 6 |
| 2012 | 3 | 6 |
| 2013 | 4 | 11 |
| 2014 | 3 | 10 |
| 2015 | 13 | 13 |
| 2016 | 15 | 19 |
| 2017 | 11 | 22 |
| 2018 | 16 | 30 |
| 2019 | 25 | 20 |
| 2020 | 20 | 13 |
| 2021 | 11 | 11 |
| 2022 | 13 | 12 |
| 2023 | 9 | 2 |
| 2024 | 6 | 5 |
| 2025 | 4 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Offshore drilling vessel with an external cable connection and method therefor18 Mar 2025US 12,252,223 B2Noble Drilling A/S
- Mobile offshore carbon capture and sequestration systems and methods using jack-up structure8 Jan 2026US 2026/0009314 A1Vtec Consulting LLC
- Geotechnical rig systems and methods20 Nov 2025US 2025/0354443 A1Gregg Drilling, LLC
- System and method for composite mudmat and mounting base25 Sep 2025US 2025/0297534 A1Baker Hughes Energy Technology UK Limited
- Mobile offshore carbon capture and sequestration systems and methods using jack-up structure19 Jun 2025US 2025/0198258 A1Vtec Consulting LLC
- Miniature Portable Offshore Oil Rig13 Mar 2025US 2025/0083779 A1
Most cited
By later US patents
- Dual hoist derrick system for deep sea drilling97US 6,217,258 B1Japan Drilling Co., Ltd. · 2001
- Multi-activity offshore exploration and/or development drilling method and apparatus68US 6,047,781 ATransocean Offshore Inc. · 2000
- Drilling tower68US 6,343,892 B12002
- Development drilling system63US 4,819,730 ASchlumberger Technology Corporation · 1989
- Auxiliary offshore rig and methods for using same62US 4,208,158 AFranklin Enterprises, Inc. · 1980