E21B 43/36
Underwater separating arrangements
Official title: Underwater separating arrangements (E21B43/38 takes precedence)
E21B43/36 (Underwater separating arrangements) appears on 302 US grants and 321 published applications in this corpus.
Search patents in E21B- Granted patents
- 302
- Published applications
- 321
- Assignees
- 148
- Inventors
- 637
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 7 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 3 |
| 2003 | 5 | 7 |
| 2004 | 3 | 11 |
| 2005 | 5 | 11 |
| 2006 | 10 | 9 |
| 2007 | 3 | 7 |
| 2008 | 3 | 3 |
| 2009 | 7 | 14 |
| 2010 | 5 | 20 |
| 2011 | 11 | 16 |
| 2012 | 16 | 16 |
| 2013 | 18 | 13 |
| 2014 | 12 | 13 |
| 2015 | 9 | 33 |
| 2016 | 16 | 27 |
| 2017 | 17 | 22 |
| 2018 | 12 | 26 |
| 2019 | 20 | 17 |
| 2020 | 24 | 20 |
| 2021 | 14 | 7 |
| 2022 | 8 | 7 |
| 2023 | 12 | 8 |
| 2024 | 8 | 4 |
| 2025 | 5 | 3 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Well stream compression system21 Jul 2026US 12,687,097 B2OneSubsea IP UK Limited
- Phase management system in oil and gas production subsea streams16 Jun 2026US 12,656,792 B2Petroleo Brasileiro S.A. - Petrobras
- Oilfield production particulate monitoring assembly3 Jun 2025US 12,320,777 B2OneSubsea IP UK Limited
- Subsea facility and method for processing gas from a subsea gas production field27 May 2025US 12,312,932 B2Saipem S.P.A.
- Drain apparatus for a subsea pipeline29 Apr 2025US 12,286,876 B2Trevelyan Trading Ltd
- Reverse flow selector system in umbilical28 May 2026US 2026/0146515 A1Petroleo Brasileiro S.A. - Petrobras
- ESP Recirculation System with Gas Separation14 May 2026US 2026/0132709 A1Baker Hughes Oilfield Operations LLC
- Subsea Pipe With Integrated Filter23 Apr 2026US 2026/0110237 A1Chevron U.S.A.Inc.
- Well stream compression system12 Mar 2026US 2026/0071532 A1OneSubsea IP UK Limited
- Structural damping for subsea noise mitigation7 Aug 2025US 2025/0250993 A1Chevron U.S.A.Inc.
Most cited
By later US patents
- Method and a plant for transport of hydrocarbons over a long distance from an offshore source of hydrocarbons555US 4,991,614 AKvaerner Engineering A.S. · 1991
- System for increasing the recovery of product fluids from underwater marine deposits72US 4,527,632 A1985
- Integrated subsea power pack for drilling and production72US 7,011,152 B2Vetco Aibel AS · 2006
- Subsea blowout containment method and apparatus57US 4,324,505 A1982
- Sea bed process complex57US 4,848,475 AThe British Petroleum Company p.l.c. · 1989