E21B 33/076
Specially adapted for underwater installations
Official title: specially adapted for underwater installations
E21B33/076 (Specially adapted for underwater installations) appears on 405 US grants and 365 published applications in this corpus.
Search patents in E21B- Granted patents
- 405
- Published applications
- 365
- Assignees
- 137
- Inventors
- 625
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 1 |
| 2002 | 13 | 20 |
| 2003 | 8 | 16 |
| 2004 | 14 | 19 |
| 2005 | 7 | 7 |
| 2006 | 14 | 9 |
| 2007 | 6 | 2 |
| 2008 | 5 | 9 |
| 2009 | 3 | 11 |
| 2010 | 7 | 21 |
| 2011 | 10 | 26 |
| 2012 | 14 | 22 |
| 2013 | 13 | 14 |
| 2014 | 22 | 24 |
| 2015 | 27 | 22 |
| 2016 | 22 | 18 |
| 2017 | 20 | 21 |
| 2018 | 23 | 18 |
| 2019 | 15 | 15 |
| 2020 | 15 | 26 |
| 2021 | 17 | 11 |
| 2022 | 17 | 8 |
| 2023 | 11 | 10 |
| 2024 | 8 | 8 |
| 2025 | 9 | 6 |
| 2026 | 7 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Subsea well intervention systems and methods10 Mar 2026US 12,571,279 B1Halliburton Energy Services.Inc.
- Subsea well intervention systems and methods24 Feb 2026US 12,560,045 B1Halliburton Energy Services.Inc.
- Subsea well intervention systems and methods24 Feb 2026US 12,560,046 B1Halliburton Energy Services.Inc.
- System and process for subsea fiberoptic logging of a well3 Feb 2026US 12,540,544 B2Trendsetter Engineering, Inc.
- Rotating and reciprocating swivel apparatus and method27 Jan 2026US 12,534,972 B2Mako Rentals, Inc.
- Apparatus, systems and methods for oil and gas operations28 May 2026US 2026/0146512 A1Enpro Subsea Limited
- System and Process for Subsea Fiberoptic Logging of a Well18 Sep 2025US 2025/0290406 A1Trendsetter Engineering, Inc.
- Rotating and reciprocating swivel apparatus and method31 Jul 2025US 2025/0243727 A1Mako Rentals, Inc.
- System and process for subsea fiberoptic logging of a well3 Jul 2025US 2025/0215790 A1Trendsetter Engineering, Inc.
- Rotating and reciprocating swivel apparatus and method5 Jun 2025US 2025/0179880 A1Mako Rentals, Inc.
Most cited
By later US patents
- Remote cementing plug launching system124US 4,624,312 AHalliburton Company · 1986
- Drilling system and method for controlling equivalent circulating density during drilling of wellbores105US 7,270,185 B2Baker Hughes Incorporated · 2007
- Lightweight intervention system100US 6,053,252 AExpro North Sea Limited · 2000
- Method for remotely launching subsea pigs in response to wellhead pressure change97US 6,022,421 ASonsub International Ltd. · 2000
- Subsea wellbore drilling system for reducing bottom hole pressure97US 6,415,877 B1Deep Vision Inc. · 2002