E21B 10/18
Characterised by conduits or nozzles for drilling fluids
Official title: characterised by conduits or nozzles for drilling fluids
E21B10/18 (Characterised by conduits or nozzles for drilling fluids) appears on 257 US grants and 100 published applications in this corpus.
Search patents in E21B- Granted patents
- 257
- Published applications
- 100
- Assignees
- 87
- Inventors
- 390
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 8 | 0 |
| 1978 | 12 | 0 |
| 1979 | 4 | 0 |
| 1980 | 14 | 0 |
| 1981 | 11 | 0 |
| 1982 | 5 | 0 |
| 1983 | 13 | 0 |
| 1984 | 2 | 0 |
| 1985 | 11 | 0 |
| 1986 | 5 | 0 |
| 1987 | 8 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 4 |
| 2002 | 8 | 3 |
| 2003 | 5 | 2 |
| 2004 | 2 | 3 |
| 2005 | 0 | 3 |
| 2006 | 3 | 5 |
| 2007 | 4 | 1 |
| 2008 | 2 | 2 |
| 2009 | 1 | 4 |
| 2010 | 5 | 5 |
| 2011 | 3 | 4 |
| 2012 | 3 | 5 |
| 2013 | 2 | 8 |
| 2014 | 3 | 3 |
| 2015 | 2 | 5 |
| 2016 | 9 | 8 |
| 2017 | 2 | 4 |
| 2018 | 2 | 6 |
| 2019 | 6 | 2 |
| 2020 | 7 | 4 |
| 2021 | 8 | 6 |
| 2022 | 5 | 2 |
| 2023 | 1 | 2 |
| 2024 | 3 | 4 |
| 2025 | 6 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Jetting system for drilling operations8 Sep 2026US 12,729,588 B1Saudi Arabian Oil Company
- Rotating check valve for improved downhole operations3 Mar 2026US 12,565,812 B2Schlumberger Technology Corporation
- Method of thermal assembly of leg-cone assemblies into a rotating cone drill bit body16 Dec 2025US 12,497,840 B1Salvation Drilling Tools, LLC
- Drill head for creating a borehole in the ground4 Nov 2025US 12,460,487 B2Herrenknecht AG
- Drill bit for use with intensified fluid pressures23 Sep 2025US 12,421,801 B2Schlumberger Technology Corporation
- Drill bit and method for directional drilling27 Aug 2026US 2026/0251019 A1Canopus Drilling Solutions Holding B.V.
- Fully sealed down the hole hammer16 Jul 2026US 2026/0201760 A1Sandvik Mining and Construction Oy
- Rotating check valve for improved downhole operations2 Jul 2026US 2026/0185408 A1Schlumberger Technology Corporation
- Rotating check valve for improved downhole operations7 Aug 2025US 2025/0250867 A1Schlumberger Technology Corporation
- Earth-boring tools, nozzles, and associated structures, apparatus, and methods12 Jun 2025US 2025/0188806 A1Baker Hughes Oilfields Operations, Inc.
Most cited
By later US patents
- Rotary drilling bits131US 4,553,615 ANL Industries, Inc. · 1985
- Hydromechanical drilling device116US 4,106,577 AThe Curators of the University of Missouri · 1978
- Jet nozzle99US 4,531,592 A1985
- Remotely operable hydraulic underreamer99US 6,378,632 B1Smith International, Inc. · 2002
- Borehole angle control by gage corner removal effects from hydraulic fluid jet95US 4,307,786 A1981