E21B 17/02
Couplings
Official title: Couplings; joints {(expandable couplings or joints E21B43/106)}
E21B17/02 (Couplings) appears on 6,015 US grants and 5,292 published applications in this corpus.
Search patents in E21B- Granted patents
- 6,015
- Published applications
- 5,292
- Assignees
- 1,668
- Inventors
- 8,129
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 34 | 0 |
| 1977 | 42 | 0 |
| 1978 | 35 | 0 |
| 1979 | 19 | 0 |
| 1980 | 43 | 0 |
| 1981 | 49 | 0 |
| 1982 | 27 | 0 |
| 1983 | 46 | 0 |
| 1984 | 70 | 0 |
| 1985 | 77 | 0 |
| 1986 | 78 | 0 |
| 1987 | 79 | 0 |
| 1988 | 60 | 0 |
| 1989 | 68 | 0 |
| 1990 | 67 | 0 |
| 1991 | 54 | 0 |
| 1992 | 67 | 0 |
| 1993 | 54 | 0 |
| 1994 | 69 | 0 |
| 1995 | 61 | 0 |
| 1996 | 36 | 0 |
| 1997 | 32 | 0 |
| 1998 | 71 | 0 |
| 1999 | 57 | 0 |
| 2000 | 79 | 0 |
| 2001 | 97 | 23 |
| 2002 | 80 | 78 |
| 2003 | 70 | 116 |
| 2004 | 89 | 164 |
| 2005 | 85 | 150 |
| 2006 | 115 | 119 |
| 2007 | 105 | 134 |
| 2008 | 97 | 143 |
| 2009 | 83 | 118 |
| 2010 | 133 | 172 |
| 2011 | 125 | 201 |
| 2012 | 142 | 185 |
| 2013 | 130 | 213 |
| 2014 | 158 | 258 |
| 2015 | 193 | 293 |
| 2016 | 213 | 306 |
| 2017 | 271 | 313 |
| 2018 | 265 | 328 |
| 2019 | 324 | 262 |
| 2020 | 293 | 243 |
| 2021 | 275 | 315 |
| 2022 | 286 | 300 |
| 2023 | 324 | 279 |
| 2024 | 271 | 260 |
| 2025 | 292 | 189 |
| 2026 | 125 | 130 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 17/04Between rod or the like and bit or between rod and rod3,890
- E21B 17/028Electrical or electro-magnetic connections1,074
- E21B 17/08Casing joints696
- E21B 17/023Arrangements for connecting cables or wirelines to downhole devices598
- E21B 17/03Between drilling rod or pipe and drill motor or surface drive179
- E21B 17/021Devices for subsurface connecting or disconnecting by rotation81
Recent patents
- Vibrational damper for elevated temperatures6 Oct 2026US 12,753,659 B2Baker Hughes Oilfield Operations LLC
- Tool string transportation device6 Oct 2026US 12,753,667 B2Petromac IP Limited
- Electro-mechanical disconnect mechanism29 Sep 2026US 12,747,641 B2Schlumberger Technology Corporation
- Active torsional isolator and damper29 Sep 2026US 12,747,642 B2Halliburton Energy Services.Inc.
- Connector assembly for emergency decoupling of a subsea end fitting of a movable subsea structure29 Sep 2026US 12,747,653 B2S3N Ventus Ltd
- Threaded Joint8 Oct 2026US 2026/0308988 A1Diversity Technologies Corporation
- Downhole apparatus for oscillating a tubular string8 Oct 2026US 2026/0308989 A1Grant Prideco, L.P.
- Bi-directional Running Tool for Expandable Liner Hanger8 Oct 2026US 2026/0309007 A1Halliburton Energy Services.Inc.
- Optical cable straightening structure for logging while drilling, and drilling device1 Oct 2026US 2026/0298033 A1Wuhan University of Technology
- Apparatus and method for attaching downhole device to cable1 Oct 2026US 2026/0298034 A1
Most cited
By later US patents
- Well completions with expandable casing portions290US 5,325,923 AHalliburton Company · 1994
- Downhole data transmission system288US 6,670,880 B1Novatek Engineering, Inc. · 2003
- Expandable joint connector281US 6,409,175 B1Grant Prideco, L.P. · 2002
- Method for running downhole tools and devices with coiled tubing276US 5,435,395 AHalliburton Company · 1995
- In situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well270US 6,932,155 B2Shell Oil Company · 2005