E21B 15/045
Hydraulic, pneumatic or electric circuits for their positioning
Official title: {Hydraulic, pneumatic or electric circuits for their positioning}
E21B15/045 (Hydraulic, pneumatic or electric circuits for their positioning) appears on 46 US grants and 55 published applications in this corpus.
Search patents in E21B- Granted patents
- 46
- Published applications
- 55
- Assignees
- 28
- Inventors
- 90
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 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 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 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 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 0 |
| 2009 | 2 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 7 |
| 2019 | 1 | 8 |
| 2020 | 9 | 9 |
| 2021 | 4 | 4 |
| 2022 | 3 | 1 |
| 2023 | 4 | 7 |
| 2024 | 4 | 2 |
| 2025 | 7 | 5 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Construction machine and method for carrying out a construction work step8 Sep 2026US 12,729,586 B1Klemm Bohrtechnik GmbH
- Drilling rig power supply bus management28 Apr 2026US 12,614,910 B2Rouse Industries Inc.
- Support device for hydraulic workover unit for wellbore24 Mar 2026US 12,584,358 B1Halliburton Energy Services.Inc.
- Underground production drill communication system25 Nov 2025US 12,483,638 B2BCI Mining Technology Pty Ltd
- Autonomous tractor using counter flow-driven propulsion12 Aug 2025US 12,385,338 B2Halliburton Energy Services.Inc.
- Construction machine and method for carrying out a construction work step10 Sep 2026US 2026/0266136 A1Klemm Bohrtechnik GmbH
- Mobile rig to well securement system and method26 Feb 2026US 2026/0055670 A1
- Mobile rig to well alignment system and method26 Feb 2026US 2026/0055671 A1
- Well rig with tubing anti-buckling system and method26 Feb 2026US 2026/0055676 A1
- Directional drill securing device and method23 Oct 2025US 2025/0327362 A1TT Technologies, Inc.
Most cited
By later US patents
- Derrick assembly capable of conveying pipe sections between a drill string and a rack for said pipe sections32US 5,183,122 ARoll'n Well Servicing Inc. · 1993
- Mobile foxhole excavator16US 5,158,146 A1992
- Blowout preventer positioning system11US 7,389,820 B2Schlumberger Technology Corporation · 2008
- Method and apparatus for moving in formation the modular components of a drilling rig from well to well11US 7,624,831 B2Helmerich & Payne, Inc. · 2009
- Horizontal directional drilling system11US 9,556,691 B2Vermeer Manufacturing Company · 2017