E21B 33/1295
Actuated by fluid pressure
Official title: actuated by fluid pressure
E21B33/1295 (Actuated by fluid pressure) appears on 359 US grants and 161 published applications in this corpus.
Search patents in E21B- Granted patents
- 359
- Published applications
- 161
- Assignees
- 102
- Inventors
- 531
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 16 | 0 |
| 1985 | 7 | 0 |
| 1986 | 8 | 0 |
| 1987 | 12 | 0 |
| 1988 | 12 | 0 |
| 1989 | 6 | 0 |
| 1990 | 9 | 0 |
| 1991 | 8 | 0 |
| 1992 | 12 | 0 |
| 1993 | 14 | 0 |
| 1994 | 10 | 0 |
| 1995 | 16 | 0 |
| 1996 | 13 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 3 |
| 2002 | 2 | 3 |
| 2003 | 4 | 7 |
| 2004 | 4 | 4 |
| 2005 | 2 | 5 |
| 2006 | 4 | 3 |
| 2007 | 3 | 1 |
| 2008 | 3 | 3 |
| 2009 | 2 | 7 |
| 2010 | 2 | 8 |
| 2011 | 3 | 6 |
| 2012 | 9 | 9 |
| 2013 | 4 | 6 |
| 2014 | 6 | 7 |
| 2015 | 8 | 8 |
| 2016 | 7 | 4 |
| 2017 | 4 | 8 |
| 2018 | 8 | 12 |
| 2019 | 7 | 5 |
| 2020 | 9 | 11 |
| 2021 | 12 | 8 |
| 2022 | 8 | 12 |
| 2023 | 8 | 10 |
| 2024 | 7 | 8 |
| 2025 | 8 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Anti-preset mechanism for production packers8 Sep 2026US 12,729,598 B2Halliburton Energy Services.Inc.
- Packer and unsealing method thereof16 Jun 2026US 12,655,710 B2China Petroleum & Chemical Corporation
- Annular barrier16 Dec 2025US 12,497,853 B2Welltec Manufacturing Center Completions ApS
- Completion system for CCS monitoring16 Dec 2025US 12,497,854 B2Welltec Manufacturing Center Completions ApS
- High expansion multi-slip frac plug with narrow cross-section16 Dec 2025US 12,497,856 B2Lateral Completions Ltd.
- Anti-preset mechanism for production packers27 Aug 2026US 2026/0251033 A1Halliburton Energy Services.Inc.
- Packer and unsealing method thereof29 Jan 2026US 2026/0028891 A1China Petroleum & Chemical Corporation
- Systems And Methods For Flow-Activated Initiation Of Plug Assembly Flow Seats10 Apr 2025US 2025/0116170 A1Paramount Design LLC
- Completion system for ccs monitoring28 Nov 2024US 2024/0392646 A1Welltec Manufacturing Center Completions ApS
- Downhole plugging tool with ballistic plug and method of using same1 Aug 2024US 2024/0254849 A1GR Energy Services Management, LP
Most cited
By later US patents
- Method and apparatus for providing controlled force transference to a wellbore tool200US 5,343,963 A1994
- Gravel packing system181US 5,332,038 ABaker Hughes Incorporated · 1994
- Apparatus and method for orienting and setting a hydraulically-actuatable tool in a borehole180US 5,443,129 ASmith International, Inc. · 1995
- Retrievable straddle packer171US 4,590,995 AHalliburton Company · 1986
- Whipstock packer assembly163US 4,765,404 ADrilex Systems, Inc. · 1988