E21B 29/007
With a radially-retracting cutter rotating outside the pipe
Official title: {with a radially-retracting cutter rotating outside the pipe}
E21B29/007 (With a radially-retracting cutter rotating outside the pipe) appears on 25 US grants and 25 published applications in this corpus.
Search patents in E21B- Granted patents
- 25
- Published applications
- 25
- Assignees
- 17
- Inventors
- 47
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 3 |
| 2012 | 1 | 2 |
| 2013 | 2 | 0 |
| 2014 | 2 | 0 |
| 2015 | 2 | 2 |
| 2016 | 1 | 4 |
| 2017 | 3 | 2 |
| 2018 | 1 | 2 |
| 2019 | 2 | 1 |
| 2020 | 3 | 1 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Well intervention tool and method for clearing tubes and lines20 Jan 2026US 12,529,276 B2Axter
- Downhole tool for automatic tubular cutting18 Nov 2025US 12,473,788 B2Schlumberger Technology Corporation
- External intervention downhole drilling and workover tool27 May 2025US 12,312,888 B2Saudi Arabian Oil Company
- Well abandonment12 Dec 2023US 11,840,902 B2Ardyne Holdings Limited
- Milling tool28 Jun 2022US 11,371,315 B2Swarfix AS
- Downhole tool for automatic tubular cutting26 Feb 2026US 2026/0055679 A1Schlumberger Technology Corporation
- Downhole tool for automatic tubular cutting6 Mar 2025US 2025/0075579 A1Schlumberger Technology Corporation
- Well intervention tool and method for clearing tubes and lines6 Feb 2025US 2025/0043646 A1Axter
- External intervention downhole drilling and workover tool20 Jun 2024US 2024/0200418 A1Saudi Arabian Oil Company
- Well Abandonment20 Oct 2022US 2022/0333454 A1Ardyne Holdings Limited
Most cited
By later US patents
- Method of cutting target members using a cutting saw device29US 7,922,424 B2Tetra Technologies, Inc. · 2011
- Method of cutting target members using a cutting saw device14US 8,109,693 B1Tetra Technologies, Inc. · 2012
- Method of cutting target members using a cutting saw device13US 8,465,227 B1Tetra Technologies, Inc. · 2013
- Oil well improvement system7US 9,085,950 B22015
- Subsea drilling5US 7,819,204 B2Geoprober Drilling Limited · 2010