E21B 19/163
Piston-cylinder actuated
Official title: {piston-cylinder actuated}
E21B19/163 (Piston-cylinder actuated) appears on 153 US grants and 137 published applications in this corpus.
Search patents in E21B- Granted patents
- 153
- Published applications
- 137
- Assignees
- 86
- Inventors
- 256
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 5 |
| 2004 | 6 | 2 |
| 2005 | 2 | 5 |
| 2006 | 7 | 3 |
| 2007 | 4 | 6 |
| 2008 | 5 | 3 |
| 2009 | 0 | 4 |
| 2010 | 4 | 2 |
| 2011 | 3 | 6 |
| 2012 | 2 | 8 |
| 2013 | 6 | 6 |
| 2014 | 2 | 6 |
| 2015 | 6 | 8 |
| 2016 | 7 | 7 |
| 2017 | 7 | 10 |
| 2018 | 9 | 11 |
| 2019 | 12 | 11 |
| 2020 | 16 | 10 |
| 2021 | 6 | 5 |
| 2022 | 5 | 3 |
| 2023 | 6 | 2 |
| 2024 | 4 | 7 |
| 2025 | 4 | 1 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Core sample handling device24 Feb 2026US 12,560,038 B2Coremax Limited
- Squeezing clamp hammer union torque tool3 Feb 2026US 12,539,583 B1Torq/Lite, LLC
- Wrench systems, methods, and related apparatus for determining angular misalignment16 Dec 2025US 12,496,667 B2Forum US, Inc.
- Torque slider tong assembly21 Oct 2025US 12,447,587 B2
- Electric tong with onboard hydraulic power unit22 Jul 2025US 12,366,127 B2Weatherford Technology Holdings, LLC
- Tong manipulator system13 Aug 2026US 2026/0235001 A1Columbia Industries, Inc.
- Tong assembly with swiveling trunnions7 May 2026US 2026/0125960 A1Petol Gearench Division of Orbix Corporation
- Headplate and a drilling rig including the same2 Apr 2026US 2026/0092503 A1Sandvik Mining and Construction Oy
- Core sample handling device12 Mar 2026US 2026/0071509 A1Coremax Limited
- Automated clamping apparatus, a method for assembly and disassembly of tubulars using the automated clamping apparatus22 Jan 2026US 2026/0022614 A1Solfins Doo Beograd
Most cited
By later US patents
- Apparatus and method for making and breaking joints in drill pipe strings143US 5,060,542 AHawk Industries, Inc. · 1991
- Apparatus for making and breaking joints in drill pipe strings106US 5,386,746 AHawk Industries, Inc. · 1995
- Blast hole drill pipe gripping mechanism95US 5,931,231 ABucyrus International, Inc. · 1999
- Drill pipe connecting and disconnecting apparatus79US 7,117,938 B2Gray Eot, Inc. · 2006
- Pipe gripper and top drive systems68US 7,055,594 B1Varco I/P, Inc. · 2006