E21B 33/134
Bridging plugs
E21B33/134 (Bridging plugs) appears on 884 US grants and 929 published applications in this corpus.
Search patents in E21B- Granted patents
- 884
- Published applications
- 929
- Assignees
- 280
- Inventors
- 1,416
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 11 | 0 |
| 1985 | 4 | 0 |
| 1986 | 0 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 7 | 0 |
| 1997 | 11 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 4 |
| 2003 | 7 | 9 |
| 2004 | 9 | 18 |
| 2005 | 5 | 12 |
| 2006 | 10 | 11 |
| 2007 | 10 | 10 |
| 2008 | 8 | 21 |
| 2009 | 11 | 13 |
| 2010 | 19 | 23 |
| 2011 | 14 | 31 |
| 2012 | 11 | 29 |
| 2013 | 18 | 37 |
| 2014 | 17 | 39 |
| 2015 | 37 | 63 |
| 2016 | 46 | 67 |
| 2017 | 49 | 67 |
| 2018 | 51 | 89 |
| 2019 | 76 | 74 |
| 2020 | 74 | 70 |
| 2021 | 75 | 68 |
| 2022 | 68 | 52 |
| 2023 | 50 | 50 |
| 2024 | 46 | 35 |
| 2025 | 43 | 24 |
| 2026 | 19 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compact downhole tool1 Sep 2026US 12,723,485 B2Nine Downhole Technologies, LLC
- Downhole tool having a fluid reservoir and methods thereof1 Sep 2026US 12,723,486 B2Brummert Applied Sciences, LLC
- Anchor system, method, and borehole system11 Aug 2026US 12,704,035 B2Baker Hughes Oilfield Operations LLC
- Plugging assemblies for plugging cased wellbores11 Aug 2026US 12,704,036 B2G&H Diversified Manufacturing LP
- Inflatable bore hole plug14 Jul 2026US 12,680,406 B2Mti Group Pty Ltd
- Improvements in or Relating to Well Abandonment8 Oct 2026US 2026/0308995 A1
- Plugging assemblies for plugging cased wellbores1 Oct 2026US 2026/0298044 A1G&H Diversified Manufacturing LP
- Gas extraction method and system based on non-solidifying sealing material1 Oct 2026US 2026/0298089 A1Taiyuan University of Technology
- Debris protection and retrievability system for bridge plugs and packers30 Jul 2026US 2026/0218584 A1Halliburton Energy Services.Inc.
- Wellbore seal23 Jul 2026US 2026/0210235 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Compositions and methods for cementing using elastic particles353US 6,508,305 B1BJ Services Company · 2003
- Dissolvable downhole tools274US 7,168,494 B2Halliburton Energy Services.Inc. · 2007
- Temporary plug system266US 5,479,986 AHalliburton Company · 1996
- Wellbore tool with disintegratable components and method of controlling flow249US 7,350,582 B2Weatherford/Lamb, Inc. · 2008
- Method for removing a tool from a well174US 7,044,230 B2Halliburton Energy Services.Inc. · 2006