E21B 17/0423
With plural threaded sections
Official title: {with plural threaded sections, e.g. with two-step threads}
E21B17/0423 (With plural threaded sections) appears on 206 US grants and 159 published applications in this corpus.
Search patents in E21B- Granted patents
- 206
- Published applications
- 159
- Assignees
- 86
- Inventors
- 254
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 9 | 0 |
| 1987 | 11 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 8 | 0 |
| 2002 | 1 | 5 |
| 2003 | 5 | 9 |
| 2004 | 6 | 2 |
| 2005 | 2 | 6 |
| 2006 | 7 | 5 |
| 2007 | 9 | 1 |
| 2008 | 1 | 3 |
| 2009 | 3 | 1 |
| 2010 | 3 | 1 |
| 2011 | 2 | 0 |
| 2012 | 0 | 9 |
| 2013 | 1 | 1 |
| 2014 | 3 | 3 |
| 2015 | 4 | 6 |
| 2016 | 1 | 5 |
| 2017 | 3 | 5 |
| 2018 | 4 | 9 |
| 2019 | 5 | 6 |
| 2020 | 9 | 10 |
| 2021 | 9 | 17 |
| 2022 | 9 | 23 |
| 2023 | 21 | 13 |
| 2024 | 16 | 9 |
| 2025 | 14 | 7 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Oriented perforating system21 Oct 2025US 12,448,854 B2DynaEnergetics Europe GmbH
- High torque threaded connections with external upset and multiple seals12 Aug 2025US 12,385,326 B2Saudi Arabian Oil Company
- Hydrodynamic down-hole anchors and related methods29 Jul 2025US 12,371,956 B2Tech Tac Company, Inc.
- Self-locking threaded connection partially in non-locking engagement29 Jul 2025US 12,372,171 B2Nippon Steel Corporation
- Method for restoring oil and gas tubulars22 Jul 2025US 12,365,043 B2ATT Technology, Ltd.
- Drill string rotation normalizing device and methods of using same23 Jul 2026US 2026/0210193 A1
- Hydrodynamic down-hole anchors and related methods4 Jun 2026US 2026/0153006 A1Tech Tac Company, Inc.
- Asymmetric wedge thread tubular connection optimized for pressure and torque control19 Feb 2026US 2026/0049677 A1Multi Helix Consulting Corp. Inc.
- Oriented perforating system6 Nov 2025US 2025/0341135 A1DynaEnergetics Europe GmbH
- Curvilinear sealing system21 Aug 2025US 2025/0263987 A1Hydril Company
Most cited
By later US patents
- Thread form with multifacited flanks177US 6,254,146 B1John Gandy Corporation · 2001
- Pipe connection170US 4,253,687 AWhiting Oilfield Rental, Inc. · 1981
- Threaded pipe connection having wedge threads153US 4,703,954 AHydril Company · 1987
- Tubular connection having a chevron wedge thread152US 4,600,224 AInterlock Technologies Corporation · 1986
- Stainless steel liner in oil well pipe144US 4,026,583 AHydril Company · 1977