E21B 29/12
Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes
Official title: specially adapted for underwater installations (E21B29/08 takes precedence)
E21B29/12 (Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes) appears on 138 US grants and 91 published applications in this corpus.
Search patents in E21B- Granted patents
- 138
- Published applications
- 91
- Assignees
- 71
- Inventors
- 213
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 2 |
| 2008 | 2 | 0 |
| 2009 | 2 | 4 |
| 2010 | 0 | 6 |
| 2011 | 3 | 2 |
| 2012 | 4 | 8 |
| 2013 | 2 | 4 |
| 2014 | 11 | 14 |
| 2015 | 10 | 3 |
| 2016 | 10 | 4 |
| 2017 | 4 | 8 |
| 2018 | 8 | 7 |
| 2019 | 9 | 4 |
| 2020 | 7 | 4 |
| 2021 | 4 | 6 |
| 2022 | 5 | 3 |
| 2023 | 4 | 3 |
| 2024 | 1 | 3 |
| 2025 | 5 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells17 Jun 2025US 12,331,614 B2Schlumberger Technology Corporation
- Method and apparatus for milling a window in casing27 May 2025US 12,312,891 B2ConocoPhillips Company
- 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
- System and method for cutting of offshore structures11 Feb 2025US 12,220,787 B2Petroliam Nasional Berhad (Petronas)
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells9 Oct 2025US 2025/0314146 A1Schlumberger Technology Corporation
- Method and apparatus for milling a window in casing24 Oct 2024US 2024/0352819 A1ConocoPhillips Company
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells16 May 2024US 2024/0159124 A1Schlumberger Technology Corporation
- Methods, apparatus and systems for creating bismuth alloy plugs for abandoned wells21 Mar 2024US 2024/0093571 A1Schlumberger Technology Corporation
- Methods, apparatus and systems for creating wellbore plugs for abandoned wells31 Aug 2023US 2023/0272689 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Pipe connector and method of applying same138US 4,817,716 ACameron Iron Works USA, Inc. · 1989
- Method of replacing a corroded well conductor in an offshore platform115US 4,526,232 AShell Offshore Inc. · 1985
- Detonation assembly for explosive wellhead severing system86US 4,909,320 ADrilex Systems, Inc. · 1990
- Method and apparatus for running coiled tubing in subsea wells61US 4,899,823 AOtis Engineering Corporation · 1990
- System for handling reeled tubing60US 5,002,130 AOtis Engineering Corporation · 1991