E21B 23/0415
Using particular fluids
Official title: {using particular fluids, e.g. electro-active liquids}
E21B23/0415 (Using particular fluids) appears on 80 US grants and 79 published applications in this corpus.
Search patents in E21B- Granted patents
- 80
- Published applications
- 79
- Assignees
- 32
- Inventors
- 150
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 4 |
| 2004 | 1 | 1 |
| 2005 | 2 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 3 |
| 2008 | 1 | 3 |
| 2009 | 2 | 4 |
| 2010 | 3 | 6 |
| 2011 | 3 | 3 |
| 2012 | 1 | 1 |
| 2013 | 5 | 6 |
| 2014 | 5 | 1 |
| 2015 | 2 | 3 |
| 2016 | 3 | 1 |
| 2017 | 1 | 2 |
| 2018 | 3 | 4 |
| 2019 | 1 | 2 |
| 2020 | 4 | 2 |
| 2021 | 3 | 4 |
| 2022 | 8 | 9 |
| 2023 | 8 | 11 |
| 2024 | 11 | 5 |
| 2025 | 4 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Openhole logging tool integrating wellbore fluids treatment system and method of use11 Nov 2025US 12,467,323 B2Saudi Arabian Oil Company
- Expandable element configuration, method and system9 Sep 2025US 12,410,781 B2Baker Hughes Oilfield Operations LLC
- Wellbore exclusion fluid method and apparatus for downhole logging26 Aug 2025US 12,398,608 B2Halliburton Energy Services.Inc.
- Actuator, method, and system29 Jul 2025US 12,371,970 B2Baker Hughes Oilfield Operations LLC
- Systems and methods for generation of electrical power in an organic rankine cycle operation19 Nov 2024US 12,146,475 B2ICE Thermal Harvesting, LLC
- Centrifugal pump for heating fluid by eddy current, and subsea tool for heating fluid by eddy current5 Mar 2026US 2026/0063016 A1Petroleo Brasileiro S.A. - Petrobras
- Wellbore exclusion fluid method and apparatus for downhole logging20 Nov 2025US 2025/0354446 A1Halliburton Energy Services.Inc.
- Openhole logging tool integrating wellbore fluids treatment system and method of use28 Aug 2025US 2025/0270886 A1Saudi Arabian Oil Company
- Actuator, method, and system12 Sep 2024US 2024/0301769 A1Baker Hughes Oilfield Operations LLC
- Systems and methods for generation of electrical power in an organic rankine cycle operation27 Jun 2024US 2024/0209844 A1ICE Thermal Harvesting, LLC
Most cited
By later US patents
- Method and apparatus for providing controlled force transference to a wellbore tool200US 5,343,963 A1994
- Downhole tool actuating apparatus and method that utilizes a gas absorptive material103US 6,695,061 B2Halliburton Energy Services.Inc. · 2004
- Chemical actuation of downhole tools101US 6,349,766 B1Baker Hughes Incorporated · 2002
- Downhole actuation system utilizing electroactive fluids95US 6,568,470 B2Baker Hughes Incorporated · 2003
- Tubing packer78US 4,749,035 ACameron Iron Works USA, Inc. · 1988