E21B 19/161
Using a wrench or a spinner adapted to engage a circular section
Official title: {using a wrench or a spinner adapted to engage a circular section of pipe (E21B19/168 takes precedence)}
E21B19/161 (Using a wrench or a spinner adapted to engage a circular section) appears on 626 US grants and 524 published applications in this corpus.
Search patents in E21B- Granted patents
- 626
- Published applications
- 524
- Assignees
- 222
- Inventors
- 782
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 11 | 0 |
| 1985 | 4 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 9 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 8 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 13 | 0 |
| 1999 | 8 | 0 |
| 2000 | 15 | 0 |
| 2001 | 16 | 2 |
| 2002 | 10 | 15 |
| 2003 | 10 | 17 |
| 2004 | 18 | 14 |
| 2005 | 12 | 26 |
| 2006 | 22 | 11 |
| 2007 | 16 | 11 |
| 2008 | 6 | 15 |
| 2009 | 4 | 18 |
| 2010 | 10 | 10 |
| 2011 | 17 | 19 |
| 2012 | 11 | 16 |
| 2013 | 18 | 18 |
| 2014 | 8 | 27 |
| 2015 | 15 | 19 |
| 2016 | 23 | 28 |
| 2017 | 18 | 29 |
| 2018 | 24 | 41 |
| 2019 | 35 | 38 |
| 2020 | 50 | 37 |
| 2021 | 34 | 36 |
| 2022 | 31 | 19 |
| 2023 | 26 | 13 |
| 2024 | 18 | 20 |
| 2025 | 16 | 12 |
| 2026 | 7 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Drilling machine attachment for loader6 Oct 2026US 12,753,656 B2The Charles Machine Works, Inc.
- Power tong apparatus and method of using same25 Aug 2026US 12,715,049 B2Premiere, Inc.
- Wrench assembly bumper plate systems23 Jun 2026US 12,662,886 B2Patterson-UTI Drilling Company LLC
- Methods and systems for installing tubulars in wells5 May 2026US 12,618,311 B2GreenFire Energy Inc.
- Core sample handling device24 Feb 2026US 12,560,038 B2Coremax Limited
- Multi-purpose robot end effector for riser running process activities24 Sep 2026US 2026/0286790 A1Grant Prideco, lnc.
- Electrical actuator with static force amplification17 Sep 2026US 2026/0275818 A1Canrig Robotic Technologies AS
- Tubular Gripping System13 Aug 2026US 2026/0235000 A1
- Tong manipulator system13 Aug 2026US 2026/0235001 A1Columbia Industries, Inc.
- Casing Pipe Coupling Systems and Methods of Coupling Casing Pipes16 Jul 2026US 2026/0201759 A1
Most cited
By later US patents
- Well system221US 6,296,066 B1Halliburton Energy Services.Inc. · 2001
- Apparatus for gripping a down hole tubular for support and rotation176US 5,297,833 AW-N Apache Corporation · 1994
- Well system175US 7,172,038 B2Halliburton Energy Services.Inc. · 2007
- Pipe running tool166US 6,443,241 B1Varco I/P, Inc. · 2002
- Apparatus and method for making and breaking joints in drill pipe strings143US 5,060,542 AHawk Industries, Inc. · 1991