E21B 31/16
Combined with cutting or destroying means
Official title: combined with cutting or destroying means
E21B31/16 (Combined with cutting or destroying means) appears on 100 US grants and 79 published applications in this corpus.
Search patents in E21B- Granted patents
- 100
- Published applications
- 79
- Assignees
- 45
- Inventors
- 186
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 3 | 3 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 3 |
| 2014 | 3 | 5 |
| 2015 | 3 | 2 |
| 2016 | 4 | 3 |
| 2017 | 3 | 3 |
| 2018 | 1 | 3 |
| 2019 | 5 | 5 |
| 2020 | 4 | 8 |
| 2021 | 10 | 6 |
| 2022 | 7 | 11 |
| 2023 | 6 | 9 |
| 2024 | 8 | 6 |
| 2025 | 5 | 5 |
| 2026 | 4 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Axial position-controlled operation toolstring and method8 Sep 2026US 12,729,595 B2Archer Oiltools AS
- Methods and apparatus for casing recovery14 Jul 2026US 12,680,408 B2Ardyne Holdings Limited
- Spear and packer tool, an assembly comprising said tool, and a method for using said tool and said assembly20 Jan 2026US 12,529,279 B2Archer Oiltools AS
- Casing cutting apparatus and methods of use13 Jan 2026US 12,523,109 B2Clear Choice Energy Services Ltd.
- Through-tubing plug4 Nov 2025US 12,460,501 B2Saudi Arabian Oil Company
- Tool for the recovery of a casing hanger from a wellhead10 Sep 2026US 2026/0266154 A1Aker Solutions Subsea AS
- Apparatus To Move An Object In An Open Hole Section of A Wellbore20 Nov 2025US 2025/0354448 A1Ardyne Holdings Limited
- Method for Casing Recovery18 Sep 2025US 2025/0290380 A1
- Methods and Apparatus for Casing Recovery17 Jul 2025US 2025/0230723 A1Ardyne Holdings Limited
- Through-tubing plug3 Apr 2025US 2025/0109648 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Retrievable whipstock anchor assembly139US 5,398,754 ABaker Hughes Incorporated · 1995
- Retrieving tool and method81US 5,074,361 AHalliburton Company · 1991
- Packer mill81US 5,881,816 AWeatherford/Lamb, Inc. · 1999
- Method and apparatus to cut and remove casing74US 5,253,710 AHomco International, Inc. · 1993
- Side entry sub hydraulic wireline cutter and method68US 7,264,060 B2Baker Hughes Incorporated · 2007