E21B 7/185
Underwater
Official title: {underwater}
E21B7/185 (Underwater) appears on 36 US grants and 22 published applications in this corpus.
Search patents in E21B- Granted patents
- 36
- Published applications
- 22
- Assignees
- 26
- Inventors
- 76
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 2 |
| 2016 | 1 | 0 |
| 2017 | 2 | 3 |
| 2018 | 4 | 1 |
| 2019 | 3 | 4 |
| 2020 | 1 | 2 |
| 2021 | 3 | 2 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for construction and completion of production and injection wells in the pre-salt fields10 Mar 2026US 12,571,262 B2Petroleo Brasileiro S.A. - Petrobras
- System and method for construction and completion of production and injection wells in the pre-salt fields15 Apr 2025US 12,276,192 B2Petroleo Brasileiro S.A. - Petrobras
- Suction cylinder exploitation device and method for marine natural gas hydrates21 May 2024US 11,988,074 B2Fu Zhou University
- Resource collection system4 Oct 2022US 11,459,858 B2
- Abrasive suspension eroding system31 May 2022US 11,346,157 B2ANT Applied New Technologies AG
- System and method for construction and completion of production and injection wells in the pre-salt fields8 May 2025US 2025/0146364 A1Petroleo Brasileiro S.A. - Petrobras
- System and method for construction and completion of production and injection wells in the pre-salt fields27 Jun 2024US 2024/0209691 A1Petroleo Brasileiro S.A. - Petrobras
- Suction cylinder exploitation device and method for marine natural gas hydrates28 Sep 2023US 2023/0304383 A1Fu Zhou University
- Resource collection system11 Nov 2021US 2021/0348482 A1
- Automatic jet breaking tool for solid fluidization exploitation of natural gas hydrate13 May 2021US 2021/0140243 A1Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang)
Most cited
By later US patents
- Subsea caisson and method of installing same133US 4,558,744 ACanOcean Resources Ltd. · 1985
- Method and apparatus for running and cementing pipe70US 4,474,243 AExxon Production Research Company · 1984
- Suction-type ocean-floor wellhead33US 4,830,541 AShell Offshore Inc. · 1989
- Method and apparatus for installing a sea-floor cellar in a subsea bottom having compacted soil conditions16US 4,334,584 AAtwood Oceanics, Inc. · 1982
- Erosive-jet diver tool14US 4,716,849 ATracor Hydronautics, Inc. · 1988