E21B 34/10
Operated by control fluid supplied from outside the borehole
Official title: operated by control fluid supplied from outside the borehole
E21B34/10 (Operated by control fluid supplied from outside the borehole) appears on 2,609 US grants and 2,108 published applications in this corpus.
Search patents in E21B- Granted patents
- 2,609
- Published applications
- 2,108
- Assignees
- 507
- Inventors
- 2,828
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 19 | 0 |
| 1978 | 18 | 0 |
| 1979 | 12 | 0 |
| 1980 | 13 | 0 |
| 1981 | 25 | 0 |
| 1982 | 25 | 0 |
| 1983 | 29 | 0 |
| 1984 | 48 | 0 |
| 1985 | 32 | 0 |
| 1986 | 42 | 0 |
| 1987 | 38 | 0 |
| 1988 | 27 | 0 |
| 1989 | 27 | 0 |
| 1990 | 27 | 0 |
| 1991 | 21 | 0 |
| 1992 | 20 | 0 |
| 1993 | 30 | 0 |
| 1994 | 27 | 0 |
| 1995 | 21 | 0 |
| 1996 | 21 | 0 |
| 1997 | 9 | 0 |
| 1998 | 21 | 0 |
| 1999 | 44 | 0 |
| 2000 | 29 | 0 |
| 2001 | 49 | 17 |
| 2002 | 31 | 37 |
| 2003 | 42 | 40 |
| 2004 | 25 | 46 |
| 2005 | 28 | 31 |
| 2006 | 32 | 33 |
| 2007 | 39 | 42 |
| 2008 | 31 | 47 |
| 2009 | 32 | 66 |
| 2010 | 59 | 50 |
| 2011 | 51 | 63 |
| 2012 | 51 | 97 |
| 2013 | 48 | 103 |
| 2014 | 73 | 108 |
| 2015 | 83 | 133 |
| 2016 | 114 | 156 |
| 2017 | 103 | 135 |
| 2018 | 142 | 158 |
| 2019 | 182 | 144 |
| 2020 | 149 | 137 |
| 2021 | 143 | 125 |
| 2022 | 129 | 107 |
| 2023 | 114 | 79 |
| 2024 | 105 | 60 |
| 2025 | 70 | 58 |
| 2026 | 43 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Convertible autofill float equipment having poppet valve and interlock15 Sep 2026US 12,735,956 B2Weatherford Technology Holdings, LLC
- Hydrostatically insensitive valve assembly8 Sep 2026US 12,729,602 B2Weatherford Technology Holdings, LLC
- Hydraulic lock apparatus8 Sep 2026US 12,729,603 B2Welleng Science and Technology Ltd.
- Down-the-hole drill hammer having a piston follower valve1 Sep 2026US 12,723,469 B2Center Rock Inc.
- Axially and rotationally locked modular valve assembly system1 Sep 2026US 12,723,487 B2Weatherford Technology Holdings, LLC
- Bi-directional Running Tool for Expandable Liner Hanger8 Oct 2026US 2026/0309007 A1Halliburton Energy Services.Inc.
- Downhole tool, well system, and method for ammonia or methanol production1 Oct 2026US 2026/0298051 A1Halliburton Energy Services.Inc.
- Convertible Autofill Float Equipment Having Poppet Valve and Interlock10 Sep 2026US 2026/0266160 A1Weatherford International, Inc.
- Flapper type pump out pplug10 Sep 2026US 2026/0266161 A1
- Flowback sub for aicds and daicds13 Aug 2026US 2026/0235013 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Temporary plug system266US 5,479,986 AHalliburton Company · 1996
- Method and apparatus for providing controlled force transference to a wellbore tool200US 5,343,963 A1994
- Method and apparatus for wellbore fluid treatment180US 6,907,936 B2Packers Plus Energy Services Inc. · 2005
- Surface controlled reservoir analysis and management system178US 5,547,029 A1996
- Casing shoes and methods of reverse-circulation cementing of casing172US 7,322,412 B2Halliburton Energy Services.Inc. · 2008