E21B 1/02
Surface drives for drop hammers or percussion drilling
Official title: Surface drives for drop hammers {or percussion drilling}, e.g. with a cable
E21B1/02 (Surface drives for drop hammers or percussion drilling) appears on 29 US grants and 26 published applications in this corpus.
Search patents in E21B- Granted patents
- 29
- Published applications
- 26
- Assignees
- 24
- Inventors
- 84
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 2 |
| 2017 | 2 | 2 |
| 2018 | 2 | 3 |
| 2019 | 1 | 1 |
| 2020 | 5 | 4 |
| 2021 | 1 | 1 |
| 2022 | 2 | 2 |
| 2023 | 1 | 0 |
| 2024 | 2 | 3 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and system for detecting a state of a joint of a drill string16 Jun 2026US 12,655,744 B2Epiroc Rock Drills Aktiebolag
- Valve cylinder, impact device and method2 Sep 2025US 12,404,725 B2Sandvik Mining and Construction Oy
- Multi-tool boring systems and methods of operating such systems15 Jul 2025US 12,359,512 B2Phoenix Boring, Inc.
- Multi-tool boring systems and methods of operating such systems16 Apr 2024US 11,959,338 B2ArcByt, Inc.
- Adapters for drilled, uncompleted wells27 Feb 2024US 11,913,313 B2Bestway Oilfield, Inc.
- System and method of manually operated drilling on an extraterrestrial surface7 May 2026US 2026/0125954 A1Honeybee Robotics, LLC
- Multi-Tool Boring Systems and Methods of Operating Such Systems9 Oct 2025US 2025/0314132 A1Phoenix Boring, Inc.
- Valve cylinder, impact device and method23 Jan 2025US 2025/0027368 A1Sandvik Mining and Construction Oy
- Multi-Tool Boring Systems and Methods of Operating Such Systems4 Jul 2024US 2024/0218743 A1ArcByt, Inc.
- Method and system for detecting a state of a joint of a drill string28 Mar 2024US 2024/0102377 A1Epiroc Rock Drills Aktiebolag
Most cited
By later US patents
- Automatic drive hammer system17US 4,405,020 ACentral Mine Equipment Company · 1983
- Rod driving tool11US 5,167,288 A1992
- Bi-steel percussive drill rod10US 7,900,719 B2Longyear TM, Inc. · 2011
- Systems and methods for underground pipe installation and soil clearing7US 10,539,254 B2Zilper Trenchless, Inc. · 2020
- Annular casing hammer5US 4,340,120 AHawk Industries, Inc. · 1982