E21B 33/1208
Characterised by the construction of the sealing or packing means
Official title: {characterised by the construction of the sealing or packing means (E21B33/1277 takes precedence)}
E21B33/1208 (Characterised by the construction of the sealing or packing means) appears on 1,828 US grants and 2,059 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,828
- Published applications
- 2,059
- Assignees
- 445
- Inventors
- 2,591
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 9 | 0 |
| 1985 | 10 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 1 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 10 | 0 |
| 1995 | 4 | 0 |
| 1996 | 8 | 0 |
| 1997 | 12 | 0 |
| 1998 | 6 | 0 |
| 1999 | 13 | 0 |
| 2000 | 9 | 0 |
| 2001 | 14 | 0 |
| 2002 | 8 | 11 |
| 2003 | 9 | 23 |
| 2004 | 15 | 27 |
| 2005 | 13 | 25 |
| 2006 | 18 | 23 |
| 2007 | 12 | 40 |
| 2008 | 25 | 63 |
| 2009 | 34 | 71 |
| 2010 | 54 | 93 |
| 2011 | 41 | 67 |
| 2012 | 47 | 81 |
| 2013 | 58 | 98 |
| 2014 | 66 | 95 |
| 2015 | 70 | 111 |
| 2016 | 81 | 115 |
| 2017 | 101 | 101 |
| 2018 | 84 | 146 |
| 2019 | 132 | 132 |
| 2020 | 136 | 111 |
| 2021 | 118 | 135 |
| 2022 | 117 | 130 |
| 2023 | 117 | 124 |
| 2024 | 101 | 86 |
| 2025 | 133 | 99 |
| 2026 | 69 | 52 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Downhole tool including a sacrificial conductive protection layer positioned about a material to be protected1 Oct 2026US 2026/0298048 A1Halliburton Energy Services.Inc.
- Apparatus for oil well completion using retrievable rotating packer hanger24 Sep 2026US 2026/0286797 A1
- High expansion aggregate seal24 Sep 2026US 2026/0286805 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Stormwater filter assembly483US 8,110,099 B2Contech Stormwater Solutions Inc. · 2012
- Expandable wellbore junction301US 6,135,208 AHalliburton Energy Services.Inc. · 2000
- Chip resistant buttons for downhole tools having slip elements243US 5,984,007 AHalliburton Energy Services.Inc. · 1999
- Metal seal well packer240US 5,685,369 AABB Vetco Gray Inc. · 1997
- Straight Bore metal-to-metal wellbore seal apparatus and method of sealing in a wellbore216US 5,511,620 A1996