E21B 23/02
Apparatus for displacing, setting, locking, releasing or removing tools, packers or the
Official title: for locking the tools or the like in landing nipples or in recesses between adjacent sections of tubing (E21B23/03 - E21B23/06 take precedence)
E21B23/02 (Apparatus for displacing, setting, locking, releasing or removing tools, packers or the) appears on 894 US grants and 587 published applications in this corpus.
Search patents in E21B- Granted patents
- 894
- Published applications
- 587
- Assignees
- 238
- Inventors
- 1,252
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 13 | 0 |
| 1978 | 10 | 0 |
| 1979 | 13 | 0 |
| 1980 | 5 | 0 |
| 1981 | 10 | 0 |
| 1982 | 7 | 0 |
| 1983 | 15 | 0 |
| 1984 | 13 | 0 |
| 1985 | 14 | 0 |
| 1986 | 19 | 0 |
| 1987 | 9 | 0 |
| 1988 | 21 | 0 |
| 1989 | 19 | 0 |
| 1990 | 13 | 0 |
| 1991 | 19 | 0 |
| 1992 | 13 | 0 |
| 1993 | 10 | 0 |
| 1994 | 11 | 0 |
| 1995 | 22 | 0 |
| 1996 | 15 | 0 |
| 1997 | 6 | 0 |
| 1998 | 20 | 0 |
| 1999 | 23 | 0 |
| 2000 | 17 | 0 |
| 2001 | 21 | 4 |
| 2002 | 17 | 18 |
| 2003 | 9 | 8 |
| 2004 | 7 | 13 |
| 2005 | 5 | 10 |
| 2006 | 4 | 11 |
| 2007 | 9 | 13 |
| 2008 | 14 | 5 |
| 2009 | 13 | 19 |
| 2010 | 11 | 15 |
| 2011 | 9 | 32 |
| 2012 | 13 | 24 |
| 2013 | 21 | 19 |
| 2014 | 27 | 36 |
| 2015 | 25 | 41 |
| 2016 | 25 | 37 |
| 2017 | 36 | 29 |
| 2018 | 32 | 48 |
| 2019 | 43 | 35 |
| 2020 | 49 | 25 |
| 2021 | 37 | 30 |
| 2022 | 22 | 21 |
| 2023 | 30 | 32 |
| 2024 | 24 | 36 |
| 2025 | 33 | 15 |
| 2026 | 14 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Connector assembly for emergency decoupling of a subsea end fitting of a movable subsea structure29 Sep 2026US 12,747,653 B2S3N Ventus Ltd
- Latch coupling including unique axial alignment slots15 Sep 2026US 12,735,952 B2Halliburton Energy Services.Inc.
- Downhole tool including a bore sensor25 Aug 2026US 12,716,306 B2Halliburton Energy Services.Inc.
- Downhole tool including a locking dog23 Jun 2026US 12,662,891 B2Halliburton Energy Services.Inc.
- Downhole orienting helix for operations requiring multiple orienting sequences28 Apr 2026US 12,612,834 B2Halliburton Energy Services.Inc.
- Method for creating a landing nipple10 Sep 2026US 2026/0266150 A1Welltec A/S
- Downhole orienting helix for operations requiring multiple orienting sequences13 Aug 2026US 2026/0235007 A1Halliburton Energy Services.Inc.
- Downhole completion assembly and systems and related methods of use6 Aug 2026US 2026/0226807 A1
- Downhole tool including a retaining clamp assembly to keep a head member flange and base member flange engaged with one another30 Jul 2026US 2026/0218575 A1Halliburton Energy Services.Inc.
- Wellhead attachment system30 Jul 2026US 2026/0218583 A1Vault Pressure Control LLC
Most cited
By later US patents
- Technique and apparatus for completing multiple zones210US 7,322,417 B2Schlumberger Technology Corporation · 2008
- Frac system without intervention194US 7,325,617 B2Baker Hughes Incorporated · 2008
- Wellbore milling and drilling190US 5,887,655 AWeatherford/Lamb, Inc. · 1999
- Isolation washpipe for earth well completions and method for use in gravel packing a well170US 5,343,949 AHalliburton Company · 1994
- Wellbore milling-- drilling166US 5,887,668 AWeatherford/Lamb, Inc. · 1999