E21B 17/07
Telescoping joints for varying drill string lengths
Official title: Telescoping joints for varying drill string lengths; Shock absorbers
E21B17/07 (Telescoping joints for varying drill string lengths) appears on 836 US grants and 648 published applications in this corpus.
Search patents in E21B- Granted patents
- 836
- Published applications
- 648
- Assignees
- 339
- Inventors
- 1,328
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 9 | 0 |
| 1978 | 8 | 0 |
| 1979 | 12 | 0 |
| 1980 | 15 | 0 |
| 1981 | 16 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 13 | 0 |
| 1985 | 14 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 10 | 0 |
| 1989 | 12 | 0 |
| 1990 | 13 | 0 |
| 1991 | 10 | 0 |
| 1992 | 13 | 0 |
| 1993 | 11 | 0 |
| 1994 | 13 | 0 |
| 1995 | 10 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 9 | 0 |
| 2000 | 12 | 0 |
| 2001 | 8 | 4 |
| 2002 | 11 | 11 |
| 2003 | 8 | 9 |
| 2004 | 17 | 25 |
| 2005 | 9 | 14 |
| 2006 | 12 | 12 |
| 2007 | 14 | 10 |
| 2008 | 11 | 23 |
| 2009 | 6 | 20 |
| 2010 | 17 | 33 |
| 2011 | 19 | 27 |
| 2012 | 26 | 31 |
| 2013 | 16 | 32 |
| 2014 | 32 | 37 |
| 2015 | 30 | 36 |
| 2016 | 30 | 42 |
| 2017 | 32 | 44 |
| 2018 | 37 | 39 |
| 2019 | 35 | 21 |
| 2020 | 34 | 20 |
| 2021 | 30 | 36 |
| 2022 | 22 | 29 |
| 2023 | 39 | 29 |
| 2024 | 32 | 32 |
| 2025 | 33 | 20 |
| 2026 | 14 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vibrational damper for elevated temperatures6 Oct 2026US 12,753,659 B2Baker Hughes Oilfield Operations LLC
- Active torsional isolator and damper29 Sep 2026US 12,747,642 B2Halliburton Energy Services.Inc.
- Shock resistant perforating tool for multizone completions18 Aug 2026US 12,709,965 B2Owen Oil Tools LP
- Downhole apparatus and method for operations involving delivery and hardening of settable materials14 Jul 2026US 12,680,417 B2Expro North Sea Limited
- Shock isolator for downhole well drilling2 Jun 2026US 12,644,343 B1MS Directional, LLC
- Downhole apparatus for oscillating a tubular string8 Oct 2026US 2026/0308989 A1Grant Prideco, L.P.
- Intelligent traction systems and control methods thereof10 Sep 2026US 2026/0266170 A1Chengdu University of Technology
- Systems and Methods for Downward Drilling Robotic Systems27 Aug 2026US 2026/0251050 A1August Robotics Limited
- Travel joint with telescoping control lines6 Aug 2026US 2026/0226802 A1Halliburton Energy Services.Inc.
- Tubing or casing conveyed fluid sampling system6 Aug 2026US 2026/0226816 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Isolation washpipe for earth well completions and method for use in gravel packing a well170US 5,343,949 AHalliburton Company · 1994
- Apparatus for absorbing shock159US 4,817,710 AHalliburton Company · 1989
- Downhole drill bit and bit coupling155US 4,962,822 ANuma Tool Company · 1990
- Fluid operated vibratory jar with rotating bit155US 5,156,223 A1992
- Well-tubing expansion joint130US 4,423,889 ADresser Industries, Inc. · 1984