E21B 33/12
Packers
Official title: Packers; Plugs (used for cementing E21B33/134, E21B33/16)
E21B33/12 (Packers) appears on 6,176 US grants and 5,785 published applications in this corpus.
Search patents in E21B- Granted patents
- 6,176
- Published applications
- 5,785
- Assignees
- 1,191
- Inventors
- 6,997
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 36 | 0 |
| 1977 | 33 | 0 |
| 1978 | 30 | 0 |
| 1979 | 28 | 0 |
| 1980 | 24 | 0 |
| 1981 | 43 | 0 |
| 1982 | 40 | 0 |
| 1983 | 59 | 0 |
| 1984 | 71 | 0 |
| 1985 | 50 | 0 |
| 1986 | 58 | 0 |
| 1987 | 67 | 0 |
| 1988 | 46 | 0 |
| 1989 | 50 | 0 |
| 1990 | 50 | 0 |
| 1991 | 51 | 0 |
| 1992 | 54 | 0 |
| 1993 | 63 | 0 |
| 1994 | 70 | 0 |
| 1995 | 62 | 0 |
| 1996 | 56 | 0 |
| 1997 | 42 | 0 |
| 1998 | 61 | 0 |
| 1999 | 49 | 0 |
| 2000 | 47 | 0 |
| 2001 | 71 | 17 |
| 2002 | 53 | 55 |
| 2003 | 49 | 78 |
| 2004 | 55 | 91 |
| 2005 | 54 | 87 |
| 2006 | 61 | 79 |
| 2007 | 65 | 105 |
| 2008 | 65 | 123 |
| 2009 | 71 | 167 |
| 2010 | 119 | 187 |
| 2011 | 94 | 163 |
| 2012 | 114 | 194 |
| 2013 | 136 | 257 |
| 2014 | 149 | 280 |
| 2015 | 221 | 391 |
| 2016 | 270 | 425 |
| 2017 | 306 | 346 |
| 2018 | 323 | 420 |
| 2019 | 436 | 384 |
| 2020 | 382 | 356 |
| 2021 | 391 | 373 |
| 2022 | 362 | 334 |
| 2023 | 321 | 280 |
| 2024 | 279 | 245 |
| 2025 | 309 | 235 |
| 2026 | 180 | 113 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 33/1208Characterised by the construction of the sealing or packing means1,828
- E21B 33/129With mechanical slips for hooking into the casing1,499
- E21B 33/128With a member expanded radially by axial pressure1,055
- E21B 33/124Units with longitudinally-spaced plugs for isolating the intermediate space942
- E21B 33/127With inflatable sleeve921
- E21B 33/126With fluid-pressure-operated elastic cup or skirt262
- E21B 33/1204Permanent214
- E21B 33/122Multiple string packers159
Recent patents
- Retrievable packer element—anti extrusion barrier6 Oct 2026US 12,753,671 B2Expro North Sea Limited
- Garter spring including spacer elements6 Oct 2026US 12,753,672 B2Halliburton Energy Services.Inc.
- Systems and methods for attached-anchored casing stub repair6 Oct 2026US 12,753,678 B2Saudi Arabian Oil Company
- Method of creating an annular zonal isolation seal in a downhole annulus6 Oct 2026US 12,753,679 B2Shell USA, Inc.
- Elastomeric wellbore seal with silicon-based polymer29 Sep 2026US 12,747,384 B2Halliburton Energy Services.Inc.
- Resettable, retrievable multi-size donut seal8 Oct 2026US 2026/0308999 A1Halliburton Energy Services.Inc.
- Downhole tool and method of use8 Oct 2026US 2026/0309000 A1The WellBoss Company, LLC
- Hydrogen swellable fillers for surface and underground fluid isolation barriers1 Oct 2026US 2026/0297416 A1Schlumberger Technology Corporation
- Plugging assemblies for plugging cased wellbores1 Oct 2026US 2026/0298044 A1G&H Diversified Manufacturing LP
- Downhole tool including a sacrificial conductive protection layer positioned about a material to be protected1 Oct 2026US 2026/0298048 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Stormwater filter assembly483US 8,110,099 B2Contech Stormwater Solutions Inc. · 2012
- Method for treating multiple wellbore intervals339US 6,543,538 B2ExxonMobil Upstream Research Company · 2003
- Well control systems employing downhole network334US 5,959,547 ABaker Hughes Incorporated · 1999
- Expandable wellbore junction301US 6,135,208 AHalliburton Energy Services.Inc. · 2000
- One-time use composite tool formed of fibers and a biodegradable resin287US 7,093,664 B2Halliburton Energy Services.Inc. · 2006