E21B 21/06
Arrangements for treating drilling fluids outside the borehole
E21B21/06 (Arrangements for treating drilling fluids outside the borehole) appears on 2,174 US grants and 2,170 published applications in this corpus.
Search patents in E21B- Granted patents
- 2,174
- Published applications
- 2,170
- Assignees
- 789
- Inventors
- 3,477
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 6 | 0 |
| 1978 | 11 | 0 |
| 1979 | 9 | 0 |
| 1980 | 20 | 0 |
| 1981 | 14 | 0 |
| 1982 | 27 | 0 |
| 1983 | 21 | 0 |
| 1984 | 26 | 0 |
| 1985 | 14 | 0 |
| 1986 | 10 | 0 |
| 1987 | 19 | 0 |
| 1988 | 11 | 0 |
| 1989 | 16 | 0 |
| 1990 | 9 | 0 |
| 1991 | 9 | 0 |
| 1992 | 19 | 0 |
| 1993 | 13 | 0 |
| 1994 | 11 | 0 |
| 1995 | 9 | 0 |
| 1996 | 11 | 0 |
| 1997 | 8 | 0 |
| 1998 | 17 | 0 |
| 1999 | 25 | 0 |
| 2000 | 33 | 0 |
| 2001 | 39 | 9 |
| 2002 | 32 | 29 |
| 2003 | 30 | 31 |
| 2004 | 24 | 42 |
| 2005 | 25 | 37 |
| 2006 | 20 | 48 |
| 2007 | 31 | 68 |
| 2008 | 34 | 69 |
| 2009 | 40 | 58 |
| 2010 | 49 | 63 |
| 2011 | 40 | 62 |
| 2012 | 40 | 63 |
| 2013 | 50 | 85 |
| 2014 | 70 | 127 |
| 2015 | 66 | 108 |
| 2016 | 85 | 145 |
| 2017 | 95 | 177 |
| 2018 | 93 | 128 |
| 2019 | 133 | 144 |
| 2020 | 165 | 170 |
| 2021 | 153 | 122 |
| 2022 | 116 | 92 |
| 2023 | 133 | 99 |
| 2024 | 97 | 86 |
| 2025 | 86 | 58 |
| 2026 | 52 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Contaminant remediation with functionalized (meth)acrylic polymer or copolymer macroparticulates and systems related thereto6 Oct 2026US 12,753,257 B2Countertrace LLC
- System and method for processing a slurry29 Sep 2026US 12,747,645 B2Flowback Fluids LLC
- Monitoring drilling rig operations29 Sep 2026US 12,747,660 B1Saudi Arabian Oil Company
- Rock straining system15 Sep 2026US 12,735,950 B2Proppant Express Solutions, LLC
- Predicted bias correction for drilling fluids15 Sep 2026US 12,736,516 B2Halliburton Energy Services.Inc.
- Drilling mud and method of making drilling mud having an unrefined petroleum product8 Oct 2026US 2026/0308439 A14 Oaks Solutions LLC
- Device and method for automatically recovering logging data storage1 Oct 2026US 2026/0295480 A1China Petroleum & Chemical Corporation
- Emulsifier and preparation method therefor, and oil-based drilling fluid1 Oct 2026US 2026/0297414 A1China Petroleum & Chemical Corporation
- Water management system1 Oct 2026US 2026/0298042 A1Hilti Aktiengesellschaft
- Monitoring drilling rig operations1 Oct 2026US 2026/0298067 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Method for continuously mixing fluids517US 5,426,137 AHalliburton Company · 1995
- Systems and methods for routing pressurized fluid305US 8,905,056 B2Halliburton Energy Services.Inc. · 2014
- Automated fracturing system and method256US 10,408,031 B2U.S. Well Services, LLC · 2019
- Combined three-in-one fracturing system252US 7,921,914 B2Hitman Holdings Ltd. · 2011
- Well fracturing systems with electrical motors and methods of use236US 10,246,984 B22019