E21B 17/021
Devices for subsurface connecting or disconnecting by rotation
Official title: {Devices for subsurface connecting or disconnecting by rotation}
E21B17/021 (Devices for subsurface connecting or disconnecting by rotation) appears on 81 US grants and 78 published applications in this corpus.
Search patents in E21B- Granted patents
- 81
- Published applications
- 78
- Assignees
- 54
- Inventors
- 193
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 4 |
| 2011 | 2 | 5 |
| 2012 | 3 | 4 |
| 2013 | 0 | 3 |
| 2014 | 5 | 4 |
| 2015 | 2 | 3 |
| 2016 | 3 | 6 |
| 2017 | 5 | 3 |
| 2018 | 5 | 4 |
| 2019 | 4 | 6 |
| 2020 | 6 | 4 |
| 2021 | 2 | 3 |
| 2022 | 4 | 5 |
| 2023 | 7 | 4 |
| 2024 | 4 | 7 |
| 2025 | 10 | 7 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Quick conduit connection system28 Apr 2026US 12,612,986 B2Cameron International Corporation
- Anchor with multiple arms for minimal rotation of latch during guided orientation6 Jan 2026US 12,516,579 B2Halliburton Energy Services.Inc.
- Downhole tool, method, and system25 Nov 2025US 12,480,367 B2
- Mechanically actuated tubular drilling, reaming and running tool with slip set control25 Nov 2025US 12,480,368 B2Premiere, Inc.
- Completing and working over a wellbore14 Oct 2025US 12,442,257 B2Saudi Arabian Oil Company
- Downhole tool, method, and system15 May 2025US 2025/0154831 A1Baker Hughes Oilfield Operations LLC
- Anchor With Multiple Arms For Minimal Rotation Of Latch During Guided Orientation17 Apr 2025US 2025/0122771 A1Halliburton Energy Services.Inc.
- Passive rotation disconnect13 Mar 2025US 2025/0084707 A1National Oilwell Varco, L. P.
- Methods and systems for a clutch allowing for one way free rotation of a mandrel27 Feb 2025US 2025/0067126 A1Nesa Energy LLC
- Processes for injection of fluids into a wellbore via drill pipe20 Feb 2025US 2025/0059847 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Subterranean rotation-inducing device and method28US 5,584,342 APonder Industries, Inc. · 1996
- Apparatus and method for controlling the connection and disconnection speed of downhole connectors24US 8,079,419 B2Halliburton Energy Services.Inc. · 2011
- Downhole makeup tool for threaded tubulars21US 5,404,944 ABaker Hughes Incorporated · 1995
- Multifunction downhole release tool mechanism with lost motion20US 8,230,932 B2Sondex Wireline Limited · 2012
- Apparatus and method for controlling the connection and disconnection speed of downhole connectors19US 8,082,998 B2Halliburton Energy Services.Inc. · 2011