E21B 33/124
Units with longitudinally-spaced plugs for isolating the intermediate space
E21B33/124 (Units with longitudinally-spaced plugs for isolating the intermediate space) appears on 942 US grants and 809 published applications in this corpus.
Search patents in E21B- Granted patents
- 942
- Published applications
- 809
- Assignees
- 275
- Inventors
- 1,572
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 11 | 0 |
| 1982 | 10 | 0 |
| 1983 | 7 | 0 |
| 1984 | 13 | 0 |
| 1985 | 6 | 0 |
| 1986 | 14 | 0 |
| 1987 | 12 | 0 |
| 1988 | 13 | 0 |
| 1989 | 13 | 0 |
| 1990 | 8 | 0 |
| 1991 | 8 | 0 |
| 1992 | 7 | 0 |
| 1993 | 18 | 0 |
| 1994 | 16 | 0 |
| 1995 | 9 | 0 |
| 1996 | 9 | 0 |
| 1997 | 6 | 0 |
| 1998 | 11 | 0 |
| 1999 | 8 | 0 |
| 2000 | 12 | 0 |
| 2001 | 16 | 1 |
| 2002 | 8 | 14 |
| 2003 | 9 | 13 |
| 2004 | 13 | 17 |
| 2005 | 10 | 9 |
| 2006 | 12 | 10 |
| 2007 | 12 | 15 |
| 2008 | 7 | 21 |
| 2009 | 13 | 26 |
| 2010 | 17 | 23 |
| 2011 | 13 | 28 |
| 2012 | 15 | 27 |
| 2013 | 19 | 46 |
| 2014 | 27 | 43 |
| 2015 | 34 | 89 |
| 2016 | 56 | 59 |
| 2017 | 60 | 35 |
| 2018 | 58 | 45 |
| 2019 | 43 | 47 |
| 2020 | 44 | 43 |
| 2021 | 48 | 47 |
| 2022 | 46 | 48 |
| 2023 | 47 | 38 |
| 2024 | 33 | 25 |
| 2025 | 37 | 26 |
| 2026 | 17 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Wellbore completion18 Aug 2026US 12,709,960 B1Saudi Arabian Oil Company
- Methods and devices for retaining conveyed heat up a wellbore18 Aug 2026US 12,709,962 B2Gradient Geothermal Inc.
- Electric completion system and methodology21 Jul 2026US 12,687,086 B2Schlumberger Technology Corporation
- Downhole plug19 May 2026US 12,631,080 B1Halliburton Energy Services.Inc.
- Interval control valve with modular screens downhole in a wellbore5 May 2026US 12,618,310 B1Halliburton Energy Services.Inc.
- Downhole patch13 Aug 2026US 2026/0235011 A1Welltec A/S
- Systems and methods for determining deformation of a tool string13 Aug 2026US 2026/0235027 A1Schlumberger Technology Corporation
- Method and apparatus for stress testing of geological formations with a high permeability6 Aug 2026US 2026/0226828 A1Schlumberger Technology Corporation
- Downhle packer assembly having an auto-retraction mechanism16 Jul 2026US 2026/0201772 A1Schlumberger Technology Corporation
- Expandable backup system for composite frac plugs2 Jul 2026US 2026/0185417 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Method for treating multiple wellbore intervals339US 6,543,538 B2ExxonMobil Upstream Research Company · 2003
- Technique and apparatus for selective multi-zone vertical and/or horizontal completions239US 5,337,808 ANatural Reserves Group, Inc. · 1994
- Focused formation fluid sampling probe198US 6,301,959 B1Halliburton Energy Services.Inc. · 2001
- Drainhole well completion188US 4,714,117 AAtlantic Richfield Company · 1987
- Method and apparatus for wellbore fluid treatment180US 6,907,936 B2Packers Plus Energy Services Inc. · 2005