E21B 41/0078
Nozzles used in boreholes
Official title: {Nozzles used in boreholes (drilling by liquid or gas jets E21B7/18; drill bits with nozzles E21B10/60; perforators using direct fluid action E21B43/114; obtaining a slurry of minerals using nozzles E21B43/29)}
E21B41/0078 (Nozzles used in boreholes) appears on 386 US grants and 317 published applications in this corpus.
Search patents in E21B- Granted patents
- 386
- Published applications
- 317
- Assignees
- 169
- Inventors
- 689
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 0 |
| 2002 | 5 | 3 |
| 2003 | 2 | 7 |
| 2004 | 3 | 4 |
| 2005 | 4 | 6 |
| 2006 | 5 | 7 |
| 2007 | 2 | 7 |
| 2008 | 7 | 6 |
| 2009 | 1 | 6 |
| 2010 | 7 | 10 |
| 2011 | 4 | 6 |
| 2012 | 7 | 9 |
| 2013 | 5 | 12 |
| 2014 | 8 | 10 |
| 2015 | 12 | 15 |
| 2016 | 15 | 30 |
| 2017 | 10 | 13 |
| 2018 | 14 | 21 |
| 2019 | 22 | 21 |
| 2020 | 20 | 19 |
| 2021 | 20 | 26 |
| 2022 | 28 | 36 |
| 2023 | 26 | 17 |
| 2024 | 22 | 10 |
| 2025 | 17 | 11 |
| 2026 | 9 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Behind casing wash and cement22 Sep 2026US 12,742,370 B2Hydra Systems AS
- Cleanout tools and related methods of operation1 Sep 2026US 12,723,489 B2
- Cleaning tool and method18 Aug 2026US 12,709,963 B2Cortrax Global Limited
- Flow control device with washpipe free feature in one housing9 Jun 2026US 12,650,061 B2Halliburton Energy Services.Inc.
- Reverse circulation jet pump and reaming stabilizer26 May 2026US 12,637,914 B2
- Method and device for horizontal bore mining3 Sep 2026US 2026/0258715 A1Iluka Resources Limited
- Wireline cleaning tool6 Aug 2026US 2026/0226811 A1Welltec A/S
- Reverse Circulation Jet Pump and Reaming Stabilizer30 Apr 2026US 2026/0117611 A1
- Setting a cement plug30 Apr 2026US 2026/0117618 A1ConocoPhillips Company
- Method and downhole apparatus for matrix acidizing of a subterranean rock formation15 Jan 2026US 2026/0015928 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Well completions using casing valves191US 4,949,788 AHalliburton Company · 1990
- Apparatus and method for performing imaging and downhole operations at a work site in wellbores165US 6,041,860 ABaker Hughes Incorporated · 2000
- Apparatus and methods for cleaning a well128US 4,919,204 AOtis Engineering Corporation · 1990
- Conduit of well cleaning and pumping device and method of use thereof121US 5,033,545 A1991
- Device and installation for the cleaning of drains, particularly in a petroleum production well114US 5,086,842 AInstitut Francais du Petrole · 1992