E21B 19/24
Guiding or centralising devices for drilling rods or pipes
E21B19/24 (Guiding or centralising devices for drilling rods or pipes) appears on 423 US grants and 412 published applications in this corpus.
Search patents in E21B- Granted patents
- 423
- Published applications
- 412
- Assignees
- 235
- Inventors
- 793
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 2 | 0 |
| 1978 | 7 | 0 |
| 1979 | 0 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 3 |
| 2003 | 4 | 5 |
| 2004 | 6 | 10 |
| 2005 | 2 | 7 |
| 2006 | 10 | 8 |
| 2007 | 5 | 4 |
| 2008 | 5 | 8 |
| 2009 | 5 | 7 |
| 2010 | 8 | 17 |
| 2011 | 12 | 13 |
| 2012 | 12 | 10 |
| 2013 | 8 | 26 |
| 2014 | 10 | 21 |
| 2015 | 20 | 38 |
| 2016 | 22 | 23 |
| 2017 | 25 | 21 |
| 2018 | 24 | 33 |
| 2019 | 26 | 28 |
| 2020 | 34 | 29 |
| 2021 | 30 | 24 |
| 2022 | 18 | 18 |
| 2023 | 25 | 16 |
| 2024 | 15 | 14 |
| 2025 | 18 | 10 |
| 2026 | 1 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic spider tubular centering systems and methods for use thereof22 Sep 2026US 12,742,359 B2Forum US, Inc.
- Drill pipe tally system28 Oct 2025US 12,454,868 B2Magnetic Variation Services, LLC
- Positioning system for blast hole drilling operations14 Oct 2025US 12,442,259 B1Caterpillar Global Mining Equipment LLC
- Stabilizer including modified helical wellbore stabilizing elements7 Oct 2025US 12,435,580 B2Halliburton Energy Services.Inc.
- Stabbing guide device for a steel tube for use in a tubular hydrocarbon column23 Sep 2025US 12,421,814 B2Vallourec Oil and Gas France
- Guiding assembly and a rock drilling apparatus comprising the same8 Oct 2026US 2026/0308993 A1Sandvik Mining and Construction Oy
- Spring assist system with positional feedback for carriers of snubbing slip bowls1 Oct 2026US 2026/0298036 A1Consolidated Rig Works, L.P.
- Drill bushing retention17 Sep 2026US 2026/0275819 A1Caterpillar Global Mining Equipment LLC
- Systems and Methods for Downward Drilling Robotic Systems27 Aug 2026US 2026/0251050 A1August Robotics Limited
- Retention system for retaining deck bushing of drilling machine13 Aug 2026US 2026/0234997 A1Caterpillar Global Mining Equipment LLC
Most cited
By later US patents
- System for handling tubulars on a rig168US 10,995,564 B2National Oilwell Varco, L. P. · 2021
- Wellbore circulation system136US 6,412,554 B1Weatherford/Lamb, Inc. · 2002
- Top head drive assembly for earth drilling machine and components thereof124US 4,821,814 A501 W-N Apache Corporation · 1989
- Method for aligning tubulars116US 6,591,471 B1Weatherford/Lamb, Inc. · 2003
- Multi-purpose mobile drill rig93US 4,371,041 ADrill Systems, Inc. · 1983