E21B 43/112
Perforators with extendable perforating members
Official title: Perforators with extendable perforating members, e.g. actuated by fluid means
E21B43/112 (Perforators with extendable perforating members) appears on 149 US grants and 143 published applications in this corpus.
Search patents in E21B- Granted patents
- 149
- Published applications
- 143
- Assignees
- 69
- Inventors
- 282
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 5 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 4 |
| 2009 | 4 | 5 |
| 2010 | 2 | 5 |
| 2011 | 4 | 7 |
| 2012 | 4 | 5 |
| 2013 | 3 | 8 |
| 2014 | 2 | 8 |
| 2015 | 4 | 11 |
| 2016 | 11 | 7 |
| 2017 | 6 | 5 |
| 2018 | 7 | 7 |
| 2019 | 7 | 6 |
| 2020 | 9 | 15 |
| 2021 | 12 | 6 |
| 2022 | 7 | 9 |
| 2023 | 9 | 4 |
| 2024 | 10 | 7 |
| 2025 | 11 | 10 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Downhole tool7 Jul 2026US 12,674,377 B2Odfjell Technology Invest Ltd
- Downhole tool27 Jan 2026US 12,534,973 B2Saudi Arabian Oil Company
- Punch and inject tool for downhole casing and method for use thereof11 Nov 2025US 12,467,334 B2Shell USA, Inc.
- System, apparatus, and method for louver perforation4 Nov 2025US 12,460,516 B1Roscoe Moss Manufacturing Company
- Assembly for use in abandoning a wellbore9 Jul 2026US 2026/0193955 A1
- Flapper rearrangement tool and method9 Jul 2026US 2026/0193959 A1Abu Dhabi Company for Onshore Petroleum Operations Limited
- Apparatus for and method of cutting through or deforming a sidewall of a downhole tubular25 Dec 2025US 2025/0389167 A1Kaseum Holdings Limited
- Systems and Methods for Downhole Service Tools27 Nov 2025US 2025/0361792 A1Schlumberger Technology Corporation
- Integrated mill and perforating downhole tool27 Nov 2025US 2025/0361799 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Apparatus and method for perforating a subterranean formation104US 6,755,249 B2Halliburton Energy Services.Inc. · 2004
- Apparatus for treating rock surrounding a wellbore93US 4,050,529 A1977
- Downhole machining of well completion equipment91US 6,439,313 B1Schlumberger Technology Corporation · 2002
- Actuator for an appliance associated with a ducted body, especially a drill rod74US 4,821,817 AS.M.F. International · 1989
- Remote control actuation device67US 4,951,760 AS.M.F. International · 1990