G01V 5/104
And detecting secondary y-rays as well as reflected or back-scattered neutrons
Official title: {and detecting secondary Y-rays as well as reflected or back-scattered neutrons}
G01V5/104 (And detecting secondary y-rays as well as reflected or back-scattered neutrons) appears on 168 US grants and 128 published applications in this corpus.
Search patents in G01V- Granted patents
- 168
- Published applications
- 128
- Assignees
- 45
- Inventors
- 225
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 6 | 0 |
| 1987 | 7 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 8 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 5 |
| 2003 | 1 | 3 |
| 2004 | 3 | 2 |
| 2005 | 3 | 3 |
| 2006 | 3 | 2 |
| 2007 | 1 | 3 |
| 2008 | 3 | 4 |
| 2009 | 5 | 1 |
| 2010 | 1 | 1 |
| 2011 | 2 | 9 |
| 2012 | 0 | 9 |
| 2013 | 5 | 9 |
| 2014 | 6 | 4 |
| 2015 | 5 | 9 |
| 2016 | 9 | 9 |
| 2017 | 9 | 12 |
| 2018 | 13 | 6 |
| 2019 | 8 | 5 |
| 2020 | 5 | 3 |
| 2021 | 4 | 5 |
| 2022 | 2 | 8 |
| 2023 | 7 | 5 |
| 2024 | 3 | 2 |
| 2025 | 6 | 6 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device for evaluating a uranium content and a hydrogen porosity of a particular region in a geological formation when drilling and associated method1 Sep 2026US 12,724,168 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Integrated pulsed neutron logging tool for spectroscopy and porosity measurements16 Jun 2026US 12,656,518 B2Halliburton Energy Services.Inc.
- Universal neutron pulsing scheme for logging operations16 Jun 2026US 12,656,519 B2Halliburton Energy Services.Inc.
- Methods and means for simultaneous casing integrity evaluation and cement inspection in a multiple-casing wellbore environment17 Feb 2026US 12,554,038 B2Visuray Technology Ltd
- Method and apparatus for obtaining formation density23 Dec 2025US 12,504,556 B2China Petroleum & Chemical Corporation
- Neutron backscatter tool background standard for geochemical logging in well systems24 Sep 2026US 2026/0287780 A1Halliburton Energy Services.Inc.
- Real-time machine learning optimization and autopilot control for pulsed neutron logging operations17 Sep 2026US 2026/0276857 A1Halliburton Energy Services.Inc.
- Prismatic grid inversion for oil saturation and 3-phase holdup12 Feb 2026US 2026/0043936 A1Halliburton Energy Services.Inc.
- Integrated Pulsed Neutron Logging Tool for Spectroscopy and Porosity Measurements18 Dec 2025US 2025/0383470 A1Halliburton Energy Services.Inc.
- Device for evaluating a uranium content and a hydrogen porosity of a particular region in a geological formation when drilling and associated method23 Oct 2025US 2025/0327943 A1Commissariat à I' énergie atomique et aux énergies alternatives
Most cited
By later US patents
- Well logging tool with an accelerator neutron source79US 4,760,252 ASchlumberger Technology Corporation · 1988
- Method for determining density of an earth formation78US 5,804,820 AJapan National Oil Corporation · 1998
- Methods and apparatus for gamma-ray spectroscopy and like measurements71US 4,883,956 ASchlumberger Technology Corporation · 1989
- Apparatus and methods for determining gas saturation and porosity of a formation penetrated by a gas filled or liquid filled borehole66US 6,207,953 B12001
- Method and apparatus for determining density of earth formations59US 5,608,215 ASchlumberger Technology Corporation · 1997