E21B 29/00
Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes
Official title: Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
E21B29/00 (Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes) appears on 2,571 US grants and 2,264 published applications in this corpus.
Search patents in E21B- Granted patents
- 2,571
- Published applications
- 2,264
- Assignees
- 647
- Inventors
- 3,345
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 12 | 0 |
| 1980 | 12 | 0 |
| 1981 | 9 | 0 |
| 1982 | 13 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 24 | 0 |
| 1986 | 14 | 0 |
| 1987 | 25 | 0 |
| 1988 | 18 | 0 |
| 1989 | 22 | 0 |
| 1990 | 21 | 0 |
| 1991 | 38 | 0 |
| 1992 | 30 | 0 |
| 1993 | 28 | 0 |
| 1994 | 35 | 0 |
| 1995 | 30 | 0 |
| 1996 | 23 | 0 |
| 1997 | 21 | 0 |
| 1998 | 51 | 0 |
| 1999 | 31 | 0 |
| 2000 | 50 | 0 |
| 2001 | 38 | 16 |
| 2002 | 34 | 50 |
| 2003 | 48 | 58 |
| 2004 | 56 | 62 |
| 2005 | 37 | 65 |
| 2006 | 66 | 40 |
| 2007 | 46 | 38 |
| 2008 | 37 | 55 |
| 2009 | 44 | 47 |
| 2010 | 32 | 68 |
| 2011 | 41 | 60 |
| 2012 | 58 | 77 |
| 2013 | 50 | 98 |
| 2014 | 66 | 134 |
| 2015 | 93 | 111 |
| 2016 | 108 | 158 |
| 2017 | 97 | 128 |
| 2018 | 112 | 157 |
| 2019 | 159 | 138 |
| 2020 | 139 | 133 |
| 2021 | 153 | 133 |
| 2022 | 130 | 115 |
| 2023 | 119 | 106 |
| 2024 | 87 | 85 |
| 2025 | 111 | 88 |
| 2026 | 59 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 29/02Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes583
- E21B 29/002Cutting581
- E21B 29/06Cutting windows533
- E21B 29/10Reconditioning of well casings359
- E21B 29/08Cutting or deforming pipes to control fluid flow222
- E21B 29/04Cutting of wire lines or the like148
- E21B 29/12Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes138
Recent patents
- Downhole tool including related lug slots and lugs for coupling a milling tool and whipstock assembly6 Oct 2026US 12,753,666 B2Halliburton Energy Services.Inc.
- Two pass window milling system that can be deployed and operated in one trip6 Oct 2026US 12,753,668 B2Halliburton Energy Services.Inc.
- Systems, tools and methods for well decommissioning29 Sep 2026US 12,747,646 B2Foro Energy, Inc.
- Robotic hydro-excavation devices15 Sep 2026US 12,735,947 B2Nova Dynamics, LLC
- Apparatus for and method of cutting through or deforming a sidewall of a downhole tubular8 Sep 2026US 12,729,594 B2Kaseum Holdings Limited
- 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
- Alignable guidance device for casing entry milling and cementing operations24 Sep 2026US 2026/0286789 A1Scientific Drilling International, Inc.
- Systems for Generating Energy from Geothermal Sources and Methods of Operating and Constructing Same24 Sep 2026US 2026/0287213 A1Roda Energy Corporation
Most cited
By later US patents
- Method of creating a wellbore in an underground formation356US 5,348,095 AShell Oil Company · 1994
- Procedures and equipment for profiling and jointing of pipes319US 6,457,532 B1Weatherford/Lamb, Inc. · 2002
- Expandable wellbore junction301US 6,135,208 AHalliburton Energy Services.Inc. · 2000
- Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells using deformable sealing means292US 5,318,122 ABaker Hughes Incorporated · 1994
- Downhole pipe expansion apparatus and method258US 6,021,850 ABaker Hughes Incorporated · 2000