E21B 29/002
Cutting
Official title: {Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe}
E21B29/002 (Cutting) appears on 581 US grants and 606 published applications in this corpus.
Search patents in E21B- Granted patents
- 581
- Published applications
- 606
- Assignees
- 185
- Inventors
- 889
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 15 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 9 | 10 |
| 2003 | 7 | 10 |
| 2004 | 8 | 13 |
| 2005 | 10 | 10 |
| 2006 | 10 | 5 |
| 2007 | 5 | 6 |
| 2008 | 9 | 13 |
| 2009 | 12 | 12 |
| 2010 | 8 | 12 |
| 2011 | 9 | 17 |
| 2012 | 8 | 16 |
| 2013 | 11 | 17 |
| 2014 | 13 | 33 |
| 2015 | 21 | 36 |
| 2016 | 25 | 42 |
| 2017 | 20 | 31 |
| 2018 | 29 | 42 |
| 2019 | 41 | 43 |
| 2020 | 45 | 42 |
| 2021 | 47 | 41 |
| 2022 | 39 | 38 |
| 2023 | 31 | 35 |
| 2024 | 32 | 33 |
| 2025 | 39 | 32 |
| 2026 | 19 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus for and method of cutting through or deforming a sidewall of a downhole tubular8 Sep 2026US 12,729,594 B2Kaseum Holdings Limited
- Axial position-controlled operation toolstring and method8 Sep 2026US 12,729,595 B2Archer Oiltools AS
- Downhole milling displacement measurement and control25 Aug 2026US 12,716,346 B2Schlumberger Technology Corporation
- Downhole tool7 Jul 2026US 12,674,377 B2Odfjell Technology Invest Ltd
- Systems and methods for drilling geothermal wells30 Jun 2026US 12,669,018 B2Helmerich & Payne Technologies, LLC
- Improvements in or Relating to Well Abandonment8 Oct 2026US 2026/0308995 A1
- Systems and methods for drilling geothermal wells1 Oct 2026US 2026/0298032 A1Helmerich & Payne Technologies, LLC
- Downhole tool1 Oct 2026US 2026/0298045 A1Welltec A/S
- Downhole tool3 Sep 2026US 2026/0258709 A1Welltec A/S
- Apparatus and method for cutting a tubular in an oil or gas well27 Aug 2026US 2026/0251030 A1Kaseum Holdings Limited
Most cited
By later US patents
- Procedures and equipment for profiling and jointing of pipes319US 6,457,532 B1Weatherford/Lamb, Inc. · 2002
- Method and apparatus for downhole sealing252US 6,425,444 B1Weatherford/Lamb, Inc. · 2002
- Method and apparatus for drilling and lining a wellbore236US 6,543,552 B1Weatherford/Lamb, Inc. · 2003
- Cutter blades for rotary tubing tools210US 5,242,017 A1993
- Pilot casing mill189US 5,027,914 A1991