E21B 34/12
Operated by movement of casings or tubings
Official title: operated by movement of casings or tubings
E21B34/12 (Operated by movement of casings or tubings) appears on 537 US grants and 381 published applications in this corpus.
Search patents in E21B- Granted patents
- 537
- Published applications
- 381
- Assignees
- 175
- Inventors
- 803
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 11 | 0 |
| 1982 | 13 | 0 |
| 1983 | 12 | 0 |
| 1984 | 9 | 0 |
| 1985 | 5 | 0 |
| 1986 | 9 | 0 |
| 1987 | 12 | 0 |
| 1988 | 5 | 0 |
| 1989 | 9 | 0 |
| 1990 | 14 | 0 |
| 1991 | 7 | 0 |
| 1992 | 14 | 0 |
| 1993 | 8 | 0 |
| 1994 | 14 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 2 | 4 |
| 2003 | 6 | 3 |
| 2004 | 0 | 8 |
| 2005 | 5 | 7 |
| 2006 | 7 | 5 |
| 2007 | 6 | 5 |
| 2008 | 2 | 6 |
| 2009 | 3 | 10 |
| 2010 | 6 | 6 |
| 2011 | 4 | 13 |
| 2012 | 7 | 11 |
| 2013 | 10 | 19 |
| 2014 | 17 | 20 |
| 2015 | 18 | 55 |
| 2016 | 29 | 51 |
| 2017 | 26 | 20 |
| 2018 | 45 | 26 |
| 2019 | 43 | 29 |
| 2020 | 21 | 18 |
| 2021 | 24 | 14 |
| 2022 | 16 | 11 |
| 2023 | 12 | 12 |
| 2024 | 10 | 10 |
| 2025 | 7 | 6 |
| 2026 | 5 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Indication of compression loading in downhole tool strings16 Jun 2026US 12,655,750 B2Thru Tubing Solutions, Inc.
- Swivel and circulation control valve tool3 Mar 2026US 12,565,817 B2Archer Oiltools AS
- Reciprocating drive apparatus10 Feb 2026US 12,546,177 B2Rotojar Innovations Limited
- Safety valve harnessing weight and gravity for fail-safe closure27 Jan 2026US 12,535,146 B2Halliburton Energy Services.Inc.
- Autonomous self-regulating injection control valve (ASRICV)6 Jan 2026US 12,516,588 B2Chevron U.S.A.Inc.
- Indication of compression loading in downhole tool strings25 Jun 2026US 2026/0176964 A1
- Downhole device employing an electromagnet assembly having a width (wem) that is no more than 200% of a stroke distance (d) and ferromagnet assembly to actuate a movable feature18 Jun 2026US 2026/0168341 A1Halliburton Energy Services.Inc.
- Downhole device employing an electromagnet assembly and permanent magnet assembly to actuate a movable feature18 Jun 2026US 2026/0168351 A1Halliburton Energy Services.Inc.
- Downhole device employing an electromagnet assembly and ferromagnet assembly to actuate a movable feature18 Jun 2026US 2026/0168352 A1Halliburton Energy Services.Inc.
- Downhole device employing electromagnet assemblies separated by a lesser distance (dem) and ferromagnet assembly to actuate a movable feature18 Jun 2026US 2026/0168353 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Method and apparatus for wellbore fluid treatment180US 6,907,936 B2Packers Plus Energy Services Inc. · 2005
- Internally sealable perforable nipple for downhole well applications174US 5,390,742 AHalliburton Company · 1995
- Isolation washpipe for earth well completions and method for use in gravel packing a well170US 5,343,949 AHalliburton Company · 1994
- Methods and devices for treating multiple-interval well bores136US 7,575,062 B2Halliburton Energy Services.Inc. · 2009
- Dedicated perforatable nipple with integral isolation sleeve126US 5,361,843 AHalliburton Company · 1994