E21B 33/122
Multiple string packers
E21B33/122 (Multiple string packers) appears on 159 US grants and 103 published applications in this corpus.
Search patents in E21B- Granted patents
- 159
- Published applications
- 103
- Assignees
- 58
- Inventors
- 256
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 7 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 2 |
| 2003 | 3 | 2 |
| 2004 | 2 | 1 |
| 2005 | 3 | 2 |
| 2006 | 1 | 3 |
| 2007 | 4 | 2 |
| 2008 | 0 | 1 |
| 2009 | 3 | 3 |
| 2010 | 2 | 2 |
| 2011 | 3 | 4 |
| 2012 | 1 | 2 |
| 2013 | 3 | 6 |
| 2014 | 5 | 5 |
| 2015 | 6 | 3 |
| 2016 | 3 | 7 |
| 2017 | 2 | 11 |
| 2018 | 8 | 7 |
| 2019 | 11 | 11 |
| 2020 | 6 | 9 |
| 2021 | 8 | 5 |
| 2022 | 5 | 1 |
| 2023 | 5 | 5 |
| 2024 | 6 | 5 |
| 2025 | 7 | 4 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Downhole fluid separator design in multilateral well13 Jan 2026US 12,523,123 B2Halliburton Energy Services.Inc.
- Annular barrier16 Dec 2025US 12,497,853 B2Welltec Manufacturing Center Completions ApS
- Wireless gas lift11 Nov 2025US 12,467,345 B2Silverwell Technology Limited
- Method and system for automated multi-zone downhole closed loop reservoir testing21 Oct 2025US 12,448,887 B2Schlumberger Technology Corporation
- Processes for injection of fluids into a wellbore via drill pipe30 Sep 2025US 12,428,928 B2Schlumberger Technology Corporation
- Gas-activated vent valve below packer for stable electrical submersible pump (esp) operation in gassy wells28 Aug 2025US 2025/0270898 A1Saudi Arabian Oil Company
- Multiple expandable metal packers with hydrolock prevention6 Mar 2025US 2025/0075588 A1Schlumberger Technology Corporation
- Downhole fluid separator design in multilateral well27 Feb 2025US 2025/0067150 A1Halliburton Energy Services.Inc.
- Processes for injection of fluids into a wellbore via drill pipe20 Feb 2025US 2025/0059847 A1Schlumberger Technology Corporation
- Method and system for automated multi-zone downhole closed loop reservoir testing19 Dec 2024US 2024/0418084 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Method and apparatus for wellbore fluid treatment180US 6,907,936 B2Packers Plus Energy Services Inc. · 2005
- Inductive coupler activated completion system138US 5,971,072 ASchlumberger Technology Corporation · 1999
- Parallel seal assembly123US 5,472,048 ABaker Hughes Incorporated · 1995
- Dual string tubing hanger117US 4,098,334 ABaker International Corporation · 1978
- Method and apparatus for wellbore fluid treatment96US 8,397,820 B2Packers Plus Energy Services Inc. · 2013