E21B 37/10
Well swabs
E21B37/10 (Well swabs) appears on 91 US grants and 67 published applications in this corpus.
Search patents in E21B- Granted patents
- 91
- Published applications
- 67
- Assignees
- 48
- Inventors
- 180
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 4 |
| 2004 | 2 | 3 |
| 2005 | 4 | 3 |
| 2006 | 1 | 1 |
| 2007 | 3 | 2 |
| 2008 | 2 | 3 |
| 2009 | 2 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 0 | 0 |
| 2016 | 0 | 8 |
| 2017 | 3 | 3 |
| 2018 | 2 | 6 |
| 2019 | 6 | 6 |
| 2020 | 7 | 2 |
| 2021 | 3 | 6 |
| 2022 | 9 | 6 |
| 2023 | 4 | 2 |
| 2024 | 2 | 2 |
| 2025 | 5 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sub-surface release plug with pressure bypass25 Aug 2026US 12,716,323 B2Weatherford Technology Holdings, LLC
- Energized swabbing device for a slickline based well initiation service tool30 Dec 2025US 12,509,965 B2Saudi Arabian Oil Company
- Dewaxer flow enhancer system and method21 Oct 2025US 12,448,868 B2
- Methods and devices for casing and cementing wellbores29 Apr 2025US 12,286,854 B1Thru Tubing Solutions, Inc.
- Wiper dart having a bi-diameter wiper cup18 Mar 2025US 12,252,959 B1Halliburton Energy Services.Inc.
- Sub-surface release plug with pressure bypass18 Jun 2026US 2026/0168349 A1Weatherford Technology Holdings, LLC
- Spinning diamond broach12 Feb 2026US 2026/0043311 A1Tally Production Systems, LLC
- Energized swabbing device for a slickline based well initiation service tool27 Nov 2025US 2025/0361796 A1Aramco Overseas Company UK Ltd
- Wiper dart having a bi-diameter wiper cup13 Mar 2025US 2025/0084733 A1Halliburton Energy Services.Inc.
- Dewaxer flow enhancer system and method29 Aug 2024US 2024/0287873 A1
Most cited
By later US patents
- Swab109US 4,190,108 A1980
- Reinforced seal unit for pumpdown pistons or well swabs24US 4,227,573 AOtis Engineering Corporation · 1980
- Pressure-operated oil and gas well swabbing device24US 4,986,727 APetro-Well Supply, Inc. · 1991
- Downhole surge pressure reduction and filtering apparatus24US 6,571,869 B1Weatherford/Lamb, Inc. · 2003
- Well treatment system and method24US 7,287,589 B2Schlumberger Technology Corporation · 2007