E21B 33/143
For underwater installations
Official title: {for underwater installations}
E21B33/143 (For underwater installations) appears on 95 US grants and 65 published applications in this corpus.
Search patents in E21B- Granted patents
- 95
- Published applications
- 65
- Assignees
- 51
- Inventors
- 173
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 4 |
| 2012 | 0 | 2 |
| 2013 | 2 | 2 |
| 2014 | 4 | 5 |
| 2015 | 0 | 6 |
| 2016 | 7 | 2 |
| 2017 | 4 | 5 |
| 2018 | 3 | 8 |
| 2019 | 3 | 5 |
| 2020 | 7 | 2 |
| 2021 | 6 | 3 |
| 2022 | 0 | 3 |
| 2023 | 5 | 5 |
| 2024 | 6 | 4 |
| 2025 | 4 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wellhead assemblies and methods2 Jun 2026US 12,644,352 B2Onesubsea, LLC
- Downhole apparatus and methods21 Apr 2026US 12,607,101 B2Expro North Sea Limited
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells17 Jun 2025US 12,331,614 B2Schlumberger Technology Corporation
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells27 May 2025US 12,312,905 B2Schlumberger Technology Corporation
- Methods, apparatus and systems for creating bismuth alloy plugs for abandoned wells27 May 2025US 12,312,906 B2Schlumberger Technology Corporation
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells9 Oct 2025US 2025/0314146 A1Schlumberger Technology Corporation
- Wellhead assemblies and methods18 Sep 2025US 2025/0290381 A1Onesubsea, LLC
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells16 May 2024US 2024/0159124 A1Schlumberger Technology Corporation
- Downhole apparatus and methods9 May 2024US 2024/0151122 A1Deltatek Oil Tools Limited
- Rigless drilling and wellhead installation2 May 2024US 2024/0141731 A1Vetco Gray Scandinavia AS
Most cited
By later US patents
- Method and compositions for use in cementing157US 6,145,591 ABJ Services Company · 2000
- Telescoping casing joint for landing a casting string in a well bore125US 5,566,772 ADavis-Lynch, Inc. · 1996
- Subsea inflatable packer system90US 5,458,194 ACTC International · 1995
- Method for cementing in a formation subject to water influx88US 5,484,019 AHalliburton Company · 1996
- Method and apparatus for running and cementing pipe70US 4,474,243 AExxon Production Research Company · 1984