E21B 4/18
Anchoring or feeding in the borehole
E21B4/18 (Anchoring or feeding in the borehole) appears on 387 US grants and 294 published applications in this corpus.
Search patents in E21B- Granted patents
- 387
- Published applications
- 294
- Assignees
- 135
- Inventors
- 599
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 5 | 0 |
| 2000 | 11 | 0 |
| 2001 | 17 | 2 |
| 2002 | 14 | 10 |
| 2003 | 10 | 18 |
| 2004 | 12 | 18 |
| 2005 | 14 | 10 |
| 2006 | 13 | 8 |
| 2007 | 16 | 10 |
| 2008 | 5 | 18 |
| 2009 | 6 | 15 |
| 2010 | 8 | 14 |
| 2011 | 10 | 11 |
| 2012 | 9 | 16 |
| 2013 | 8 | 13 |
| 2014 | 13 | 20 |
| 2015 | 22 | 20 |
| 2016 | 12 | 10 |
| 2017 | 12 | 7 |
| 2018 | 16 | 10 |
| 2019 | 6 | 9 |
| 2020 | 13 | 15 |
| 2021 | 13 | 10 |
| 2022 | 3 | 4 |
| 2023 | 9 | 4 |
| 2024 | 9 | 8 |
| 2025 | 12 | 5 |
| 2026 | 6 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Modular anti-rotation drilling systems and methods actuated by fluid pressure29 Sep 2026US 12,747,654 B1National Technology & Engineering Solutions of Sandia, LLC
- Composite umbilical for pulse power boring system25 Aug 2026US 12,716,297 B2Halliburton Energy Services.Inc.
- Shock mounting of a motor in a downhole tool28 Jul 2026US 12,692,748 B2King Southwest & Consulting of Cypress
- Extended reach power track tool used on coiled tubing14 Apr 2026US 12,601,232 B1Weatherford Technology Holdings, LLC
- Additive manufacture system3 Mar 2026US 12,565,002 B2Kongsberg Ferrotech AS
- Devices, systems, and methods for wellbore operations20 Aug 2026US 2026/0243132 A1Halliburton Energy Services.Inc.
- Composite umbilical for pulse power boring system16 Jul 2026US 2026/0201753 A1Halliburton Energy Services.Inc.
- Additive manufacture system9 Jul 2026US 2026/0192520 A1Kongsberg Ferrotech AS
- Apparatus and method for moving tools in a nonflow environment9 Jul 2026US 2026/0193951 A1Tenax Energy Systems, LLC
- System and method for anchoring and stroking a downhole motor milling assembly in a floating rig environment25 Jun 2026US 2026/0176929 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Downhole tools using artificial intelligence based control225US 5,947,213 AIntelligent Inspection Corporation · 1999
- Well system221US 6,296,066 B1Halliburton Energy Services.Inc. · 2001
- Device for removal of intraluminal occlusions220US 5,350,390 A1994
- Down-hole drilling apparatus209US 4,463,814 AAdvanced Drilling Corporation · 1984
- Method and apparatus for drilling boreholes in earth formations (drilling liner systems)204US 6,196,336 B1Baker Hughes Incorporated · 2001