E21B 33/126
With fluid-pressure-operated elastic cup or skirt
Official title: with fluid-pressure-operated elastic cup or skirt (E21B33/122, E21B33/124 take precedence)
E21B33/126 (With fluid-pressure-operated elastic cup or skirt) appears on 262 US grants and 229 published applications in this corpus.
Search patents in E21B- Granted patents
- 262
- Published applications
- 229
- Assignees
- 109
- Inventors
- 481
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 6 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 3 |
| 2002 | 1 | 1 |
| 2003 | 2 | 3 |
| 2004 | 0 | 7 |
| 2005 | 4 | 7 |
| 2006 | 4 | 8 |
| 2007 | 7 | 9 |
| 2008 | 7 | 10 |
| 2009 | 1 | 10 |
| 2010 | 14 | 10 |
| 2011 | 5 | 9 |
| 2012 | 5 | 9 |
| 2013 | 8 | 20 |
| 2014 | 13 | 13 |
| 2015 | 17 | 21 |
| 2016 | 12 | 22 |
| 2017 | 7 | 10 |
| 2018 | 18 | 9 |
| 2019 | 14 | 10 |
| 2020 | 12 | 7 |
| 2021 | 13 | 10 |
| 2022 | 11 | 7 |
| 2023 | 5 | 7 |
| 2024 | 11 | 4 |
| 2025 | 8 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Geothermal system materials30 Dec 2025US 12,509,948 B2
- Partially bonded seals for well systems30 Dec 2025US 12,509,957 B1Halliburton Energy Services.Inc.
- Expandable metal sealing/anchoring tool5 Aug 2025US 12,378,832 B2Halliburton Energy Services.Inc.
- Methods and devices for casing and cementing wellbores29 Apr 2025US 12,286,854 B1Thru Tubing Solutions, Inc.
- Packer system, and process to settle and retrieve15 Apr 2025US 12,276,174 B2Jp International Business LLC
- Geothermal system materials5 Feb 2026US 2026/0036003 A1A.L.E. Systems, Inc.
- Control of annulus return flow in well operations23 Jan 2025US 2025/0027382 A1Weatherford Technology Holdings, LLC
- Packer system, and process to settle and retrieve9 Jan 2025US 2025/0012166 A1Jp Internationa Business LLC
- Electrical submersible pump y-tool with permanent coiled tubing plug and millable ball valve10 Oct 2024US 2024/0337175 A1Saudi Arabian Oil Company
- Geothermal system materials30 May 2024US 2024/0175332 A1Multiscale Systems, Inc.
Most cited
By later US patents
- One trip backwash/sand control system with extendable washpipe isolation162US 5,413,180 AHalliburton Company · 1995
- Casing filling and circulating apparatus157US 5,971,079 A1999
- Method and apparatus for filling and circulating fluid in a wellbore during casing running operations150US 5,584,343 ADavis-Lynch, Inc. · 1996
- Hydraulic setting sleeve145US 5,375,662 AHalliburton Company · 1994
- High power umbilicals for subterranean electric drilling machines and remotely operated vehicles138US 6,857,486 B2Smart Drilling and Completion, Inc. · 2005