E21B 47/113
Using electrical indications
Official title: using electrical indications; using light radiations
E21B47/113 (Using electrical indications) appears on 568 US grants and 601 published applications in this corpus.
Search patents in E21B- Granted patents
- 568
- Published applications
- 601
- Assignees
- 156
- Inventors
- 1,106
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 12 | 4 |
| 2002 | 10 | 10 |
| 2003 | 5 | 8 |
| 2004 | 9 | 15 |
| 2005 | 9 | 7 |
| 2006 | 9 | 9 |
| 2007 | 7 | 7 |
| 2008 | 4 | 9 |
| 2009 | 7 | 11 |
| 2010 | 10 | 23 |
| 2011 | 10 | 19 |
| 2012 | 14 | 20 |
| 2013 | 20 | 34 |
| 2014 | 18 | 43 |
| 2015 | 28 | 41 |
| 2016 | 29 | 49 |
| 2017 | 34 | 53 |
| 2018 | 43 | 42 |
| 2019 | 46 | 40 |
| 2020 | 42 | 30 |
| 2021 | 40 | 33 |
| 2022 | 23 | 28 |
| 2023 | 37 | 27 |
| 2024 | 22 | 17 |
| 2025 | 16 | 17 |
| 2026 | 10 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Subsea pumping and booster system22 Sep 2026US 12,742,373 B2Baker Hughes Energy Technology UK Limited
- Fiber optic enabled intelligent completion employing an end connector16 Jun 2026US 12,655,695 B2
- Determining hydrocarbon reservoir production with a miniature multi-phase flowmeter2 Jun 2026US 12,644,735 B2Saudi Arabian Oil Company
- Fluid property estimation based on electromagnetic measurements12 May 2026US 12,624,635 B2
- Cement health monitoring in CCUS wells28 Apr 2026US 12,612,853 B2Halliburton Energy Services.Inc.
- Integrated Multi-Physics Sensing for Real-Time Look-Ahead While Drilling8 Oct 2026US 2026/0309025 A1
- Cement health monitoring in ccus wells13 Aug 2026US 2026/0235024 A1Halliburton Energy Services.Inc.
- Machine Learning Assisted Downhole Multiphase Flowmeter7 May 2026US 2026/0125977 A1Weatherford Technology Holdings, LLC
- Downhole measurement system2 Apr 2026US 2026/0092912 A1Schlumberger Technology Corporation
- Electronics-free flow sensor downhole in a wellbore26 Mar 2026US 2026/0085609 A1Halliburton Energy Services.Inc.
Most cited
By later US patents
- Drilling systems with sensors for determining properties of drilling fluid downhole402US 6,176,323 B1Baker Hughes Incorporated · 2001
- Systems and methods for electromagnetic waterfront surveillance in a vicinity of an oil well347US 11,035,972 B2Saudi Arabian Oil Company · 2021
- Method and system for monitoring smart structures utilizing distributed optical sensors332US 6,913,079 B22005
- Monitoring of downhole parameters and tools utilizing fiber optics244US 6,281,489 B1Baker Hughes Incorporated · 2001
- Apparatus and method for analyzing the composition of formation fluids242US 4,994,671 ASchlumberger Technology Corporation · 1991