G01V 3/18
Electric or magnetic prospecting or detecting: specially adapted for well-logging
Official title: specially adapted for well-logging
G01V3/18 (Electric or magnetic prospecting or detecting: specially adapted for well-logging) appears on 3,853 US grants and 3,490 published applications in this corpus.
Search patents in G01V- Granted patents
- 3,853
- Published applications
- 3,490
- Assignees
- 533
- Inventors
- 3,919
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 14 | 0 |
| 1978 | 17 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 15 | 0 |
| 1982 | 16 | 0 |
| 1983 | 15 | 0 |
| 1984 | 27 | 0 |
| 1985 | 24 | 0 |
| 1986 | 28 | 0 |
| 1987 | 47 | 0 |
| 1988 | 35 | 0 |
| 1989 | 25 | 0 |
| 1990 | 22 | 0 |
| 1991 | 27 | 0 |
| 1992 | 24 | 0 |
| 1993 | 30 | 0 |
| 1994 | 27 | 0 |
| 1995 | 37 | 0 |
| 1996 | 40 | 0 |
| 1997 | 34 | 0 |
| 1998 | 36 | 0 |
| 1999 | 42 | 0 |
| 2000 | 67 | 0 |
| 2001 | 50 | 17 |
| 2002 | 78 | 58 |
| 2003 | 106 | 121 |
| 2004 | 77 | 104 |
| 2005 | 84 | 97 |
| 2006 | 85 | 84 |
| 2007 | 77 | 76 |
| 2008 | 76 | 99 |
| 2009 | 63 | 123 |
| 2010 | 80 | 135 |
| 2011 | 86 | 115 |
| 2012 | 87 | 99 |
| 2013 | 86 | 171 |
| 2014 | 116 | 164 |
| 2015 | 111 | 225 |
| 2016 | 120 | 268 |
| 2017 | 225 | 260 |
| 2018 | 200 | 258 |
| 2019 | 328 | 219 |
| 2020 | 239 | 175 |
| 2021 | 244 | 196 |
| 2022 | 167 | 100 |
| 2023 | 144 | 116 |
| 2024 | 104 | 67 |
| 2025 | 89 | 76 |
| 2026 | 61 | 67 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01V 3/26Operating with magnetic or electric fields produced or modified either by the1,560
- G01V 3/30Operating with electromagnetic waves877
- G01V 3/32Operating with electron or nuclear magnetic resonance866
- G01V 3/20Operating with propagation of electric current765
- G01V 3/34Transmitting data to recording or processing apparatus202
Recent patents
- Methods to perform joint inversion of formation data and joint inversion systems6 Oct 2026US 12,754,340 B2Halliburton Energy Services.Inc.
- Integrity evaluation of nested tubulars of a well system using azimuthal and non-azimuthal information6 Oct 2026US 12,754,341 B2Halliburton Energy Services.Inc.
- Motion effect detection6 Oct 2026US 12,754,342 B2Schlumberger Technology Corporation
- Estimating EM LWD measurement uncertainty using machine learning6 Oct 2026US 12,754,343 B2Schlumberger Technology Corporation
- In situ concentration of hydrocarbons in rock22 Sep 2026US 12,742,768 B2Saudi Arabian Oil Company
- Integrated Multi-Physics Sensing for Real-Time Look-Ahead While Drilling8 Oct 2026US 2026/0309025 A1
- Well integrity evaluation with eddy current diffusion time response1 Oct 2026US 2026/0299159 A1Schlumberger Technology Corporation
- Resistivity Logging-Based Oil-Gas Well Skin Factor Calculation Method and Related Apparatus (2380406CN-US COSL-YJ)1 Oct 2026US 2026/0300568 A1China Oilfield Services Limited
- Characterizing pore size distribution by integrating nmr and acoustic measurements17 Sep 2026US 2026/0276571 A1Schlumberger Technology Corporation
- Z-shaped steel wire sealed load-bearing detection cable17 Sep 2026US 2026/0276855 A1Hebei Huatong Wires & Cables Group Co., Ltd.
Most cited
By later US patents
- Controlling hydrocarbon production609US 10,677,035 B2Saudi Arabian Oil Company · 2020
- Downhole combination tool358US 5,064,006 AMagrange, Inc · 1991
- NMR logging of natural gas in reservoirs352US 5,498,960 AShell Oil Company · 1996
- NMR imaging of materials350US 4,728,892 AShell Oil Company · 1988
- Systems and methods for electromagnetic waterfront surveillance in a vicinity of an oil well347US 11,035,972 B2Saudi Arabian Oil Company · 2021