E21B 17/012
With buoyancy elements
Official title: {with buoyancy elements (E21B17/015 takes precedence)}
E21B17/012 (With buoyancy elements) appears on 288 US grants and 289 published applications in this corpus.
Search patents in E21B- Granted patents
- 288
- Published applications
- 289
- Assignees
- 170
- Inventors
- 552
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 12 | 3 |
| 2002 | 11 | 9 |
| 2003 | 9 | 11 |
| 2004 | 6 | 12 |
| 2005 | 6 | 5 |
| 2006 | 10 | 7 |
| 2007 | 2 | 7 |
| 2008 | 6 | 15 |
| 2009 | 1 | 10 |
| 2010 | 5 | 17 |
| 2011 | 2 | 16 |
| 2012 | 11 | 16 |
| 2013 | 8 | 17 |
| 2014 | 13 | 20 |
| 2015 | 24 | 23 |
| 2016 | 18 | 17 |
| 2017 | 16 | 13 |
| 2018 | 11 | 18 |
| 2019 | 19 | 14 |
| 2020 | 10 | 11 |
| 2021 | 8 | 7 |
| 2022 | 6 | 3 |
| 2023 | 5 | 8 |
| 2024 | 5 | 6 |
| 2025 | 6 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stackable float assembly14 Jul 2026US 12,680,397 B2Eddy Pump Corporation
- Float apparatus14 Oct 2025US 12,442,256 B2Eddy Pump Corporation
- Spring14 Oct 2025US 12,442,426 B2Balmoral Comtec Limited
- Buoyancy module16 Sep 2025US 12,416,207 B2Advanced Innergy Ltd.
- Installation of subsea risers26 Aug 2025US 12,398,599 B2Subsea 7 do Brasil Servicos Ltda
- Offshore fluid handling23 Jul 2026US 2026/0210190 A1Aker Solutions Subsea AS
- Mechanism for positioning a buoyancy module19 Feb 2026US 2026/0049529 A1Oceaneering International, Inc.
- Improving fatigue resistance of steel catenary risers27 Nov 2025US 2025/0361776 A1Subsea 7 do Brasil Servicos Ltda
- Buoyancy module27 Nov 2025US 2025/0361952 A1Deepwater Buoyancy, Inc.
- Systems and methods using a compact powered subsea winch24 Oct 2024US 2024/0352812 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Drilling, production and oil storage caisson for deep water100US 4,702,321 A1987
- Riser pipe fairing84US 4,474,129 AW. R. Grace & Co. · 1984
- Composite marine riser system77US 4,634,314 AVetco Offshore, Inc. · 1987
- Fairing for elongated elements75US 4,398,487 AExxon Production Research Company · 1983
- Flexible supportive joint for sub-sea riser flotation means68US 3,952,526 ARegan Offshore International, Inc. · 1976