E21B 33/129
With mechanical slips for hooking into the casing
Official title: with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence)
E21B33/129 (With mechanical slips for hooking into the casing) appears on 1,499 US grants and 1,167 published applications in this corpus.
Search patents in E21B- Granted patents
- 1,499
- Published applications
- 1,167
- Assignees
- 351
- Inventors
- 1,819
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 17 | 0 |
| 1978 | 14 | 0 |
| 1979 | 19 | 0 |
| 1980 | 12 | 0 |
| 1981 | 17 | 0 |
| 1982 | 12 | 0 |
| 1983 | 27 | 0 |
| 1984 | 40 | 0 |
| 1985 | 25 | 0 |
| 1986 | 27 | 0 |
| 1987 | 32 | 0 |
| 1988 | 17 | 0 |
| 1989 | 14 | 0 |
| 1990 | 19 | 0 |
| 1991 | 22 | 0 |
| 1992 | 21 | 0 |
| 1993 | 25 | 0 |
| 1994 | 24 | 0 |
| 1995 | 22 | 0 |
| 1996 | 20 | 0 |
| 1997 | 15 | 0 |
| 1998 | 17 | 0 |
| 1999 | 10 | 0 |
| 2000 | 10 | 0 |
| 2001 | 13 | 3 |
| 2002 | 13 | 15 |
| 2003 | 8 | 21 |
| 2004 | 16 | 19 |
| 2005 | 8 | 19 |
| 2006 | 16 | 13 |
| 2007 | 9 | 8 |
| 2008 | 11 | 12 |
| 2009 | 13 | 26 |
| 2010 | 19 | 28 |
| 2011 | 16 | 31 |
| 2012 | 21 | 39 |
| 2013 | 23 | 43 |
| 2014 | 29 | 47 |
| 2015 | 48 | 82 |
| 2016 | 47 | 88 |
| 2017 | 65 | 70 |
| 2018 | 67 | 108 |
| 2019 | 102 | 74 |
| 2020 | 85 | 89 |
| 2021 | 84 | 86 |
| 2022 | 73 | 74 |
| 2023 | 68 | 59 |
| 2024 | 64 | 52 |
| 2025 | 63 | 37 |
| 2026 | 31 | 24 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Anti-preset mechanism for production packers8 Sep 2026US 12,729,598 B2Halliburton Energy Services.Inc.
- Compact downhole tool1 Sep 2026US 12,723,485 B2Nine Downhole Technologies, LLC
- Downhole tool having a fluid reservoir and methods thereof1 Sep 2026US 12,723,486 B2Brummert Applied Sciences, LLC
- Mandrel assemblies for a plug and associated methods25 Aug 2026US 12,716,318 B2G&H Diversified Manufacturing LP
- Retrievable packer and bridge plug apparatus and method for using same25 Aug 2026US 12,716,319 B1Oilfield Service Professionals, LLC
- Downhole tool and method of use8 Oct 2026US 2026/0309000 A1The WellBoss Company, LLC
- Plugging assemblies for plugging cased wellbores1 Oct 2026US 2026/0298044 A1G&H Diversified Manufacturing LP
- Downhole tool and setting system for use in a wellbore3 Sep 2026US 2026/0258713 A1The WellBoss Company, LLC
- Anti-preset mechanism for production packers27 Aug 2026US 2026/0251033 A1Halliburton Energy Services.Inc.
- Sleeve assemblies and related completion systems and methods27 Aug 2026US 2026/0251036 A1Kobold Corporation
Most cited
By later US patents
- Wellbore tool with disintegratable components and method of controlling flow249US 7,350,582 B2Weatherford/Lamb, Inc. · 2008
- Chip resistant buttons for downhole tools having slip elements243US 5,984,007 AHalliburton Energy Services.Inc. · 1999
- Downhole tool apparatus with non-metallic components and methods of drilling thereof241US 5,224,540 AHalliburton Company · 1993
- Metal seal well packer240US 5,685,369 AABB Vetco Gray Inc. · 1997
- Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters221US 6,958,704 B2Shell Oil Company · 2005