E21B 31/107
Fishing for or freeing objects in boreholes or wells: using impact means
Official title: using impact means for releasing stuck parts, e.g. jars
E21B31/107 (Fishing for or freeing objects in boreholes or wells: using impact means) appears on 415 US grants and 266 published applications in this corpus.
Search patents in E21B- Granted patents
- 415
- Published applications
- 266
- Assignees
- 133
- Inventors
- 513
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 6 | 0 |
| 1984 | 9 | 0 |
| 1985 | 12 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 9 | 0 |
| 1990 | 5 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 1 |
| 2002 | 5 | 4 |
| 2003 | 6 | 7 |
| 2004 | 6 | 6 |
| 2005 | 5 | 11 |
| 2006 | 7 | 6 |
| 2007 | 9 | 5 |
| 2008 | 5 | 6 |
| 2009 | 3 | 14 |
| 2010 | 5 | 5 |
| 2011 | 7 | 11 |
| 2012 | 7 | 8 |
| 2013 | 9 | 15 |
| 2014 | 8 | 8 |
| 2015 | 7 | 13 |
| 2016 | 10 | 15 |
| 2017 | 14 | 15 |
| 2018 | 12 | 18 |
| 2019 | 19 | 15 |
| 2020 | 19 | 15 |
| 2021 | 15 | 16 |
| 2022 | 23 | 12 |
| 2023 | 15 | 19 |
| 2024 | 14 | 11 |
| 2025 | 11 | 8 |
| 2026 | 6 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Jarring device18 Aug 2026US 12,709,956 B1Petromac IP Limited
- Variable intensity and selective pressure activated jar3 Mar 2026US 12,565,818 B2Tenax Energy System, LLC
- Magnetized wireline pulling tool24 Feb 2026US 12,560,041 B1Saudi Arabian Oil Company
- Reciprocating drive apparatus10 Feb 2026US 12,546,177 B2Rotojar Innovations Limited
- System for dislodging and extracting tubing from a wellbore3 Feb 2026US 12,540,520 B2Tenax Energy Systems, LLC
- Variable intensity and selective pressure activated jar2 Jul 2026US 2026/0185414 A1HydraShock, L.L.C.
- Cable deployed electrical submersible pump jarring tool and method8 Jan 2026US 2026/0009302 A1Alkhorayef Petroleum Company
- Systems and Methods for Downhole Service Tools27 Nov 2025US 2025/0361792 A1Schlumberger Technology Corporation
- Universal Wireline Standoff2 Oct 2025US 2025/0305373 A1
- Impact Jar Delay, Activation Indicator, Shock Absorber, and Relatch Assist21 Aug 2025US 2025/0263996 A1Weatherford Technology Holdings, LLC
Most cited
By later US patents
- Downhole anchoring tools conveyed by non-rigid carriers190US 6,315,043 B1Schlumberger Technology Corporation · 2001
- Fluid operated vibratory jar with rotating bit155US 5,156,223 A1992
- Bidirectional fluid operated vibratory jar140US 4,462,471 A1984
- Downhole anchoring tools conveyed by non-rigid carriers135US 6,651,747 B2Schlumberger Technology Corporation · 2003
- Fluid operated vibratory jar with rotating bit128US 4,958,691 A1990