E21B 31/06
Fishing for or freeing objects in boreholes or wells: using magnetic means
Official title: using magnetic means
E21B31/06 (Fishing for or freeing objects in boreholes or wells: using magnetic means) appears on 77 US grants and 74 published applications in this corpus.
Search patents in E21B- Granted patents
- 77
- Published applications
- 74
- Assignees
- 43
- Inventors
- 122
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 3 |
| 2007 | 1 | 4 |
| 2008 | 3 | 3 |
| 2009 | 1 | 0 |
| 2010 | 1 | 4 |
| 2011 | 0 | 4 |
| 2012 | 1 | 1 |
| 2013 | 1 | 3 |
| 2014 | 5 | 1 |
| 2015 | 2 | 4 |
| 2016 | 3 | 3 |
| 2017 | 0 | 2 |
| 2018 | 5 | 4 |
| 2019 | 3 | 5 |
| 2020 | 4 | 2 |
| 2021 | 2 | 9 |
| 2022 | 8 | 7 |
| 2023 | 7 | 4 |
| 2024 | 4 | 3 |
| 2025 | 4 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Wellbore cleaning tools30 Jun 2026US 12,669,028 B2Wellbore Integrity Solutions LLC
- Magnetized wireline pulling tool24 Feb 2026US 12,560,041 B1Saudi Arabian Oil Company
- Back pressure valve recovery tool and methods of use9 Dec 2025US 12,492,604 B1Saudi Arabian Oil Company
- Downhole magnet, downhole magnetic jetting tool and method of attachment of magnet pieces to the tool body4 Nov 2025US 12,460,510 B2Odfjell Well Service Norway AS
- Diffuser and filter assemblies with magnetic features14 Oct 2025US 12,442,265 B2
- Completions-based well cleanout using magnetic cleanout tool30 Jul 2026US 2026/0218587 A1Halliburton Energy Services.Inc.
- Back pressure valve recovery tool and methods of use11 Dec 2025US 2025/0376905 A1Saudi Arabian Oil Company
- Downhole Fish Grabbing Tool9 Oct 2025US 2025/0314144 A1Saudi Arabian Oil Company
- Wellbore cleaning tools1 May 2025US 2025/0137355 A1Wellbore Integrity Solutions LLC
- Debris capturing magnet with real time debris capacity monitoring5 Dec 2024US 2024/0401427 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Junk bailer apparatus for use in retrieving debris from a well bore of an oil and gas well125US 5,944,100 ABaker Hughes Incorporated · 1999
- Junk basket and method of removing foreign material from a well73US 4,059,155 AInternational Enterprises, Inc. · 1977
- Magnetic well cleaning apparatus52US 6,655,462 B1SPS-AFOS International Limited · 2003
- Downhole cutting separator50US 6,176,311 B1Baker Hughes Incorporated · 2001
- Multipurpose fluid flow assisted downhole tool42US 4,296,822 AOmega Tools International · 1981