Thermal and epithermal neutrons from an earth formation
US9261624B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2013 |
| Grant date | Feb 16, 2016 |
| Priority date | — |
| Expiry date | Oct 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for detecting radiation in a borehole intersecting an earth formation. The apparatus may include a neutron sensitive scintillation media and at least one optically transparent neutron absorptive material optically coupled to the media, which may be positioned to prevent incident neutrons from reaching a neutron-shaded surface of the media, and to provide directional sensitivity. The neutron absorptive material may comprise a light guide optically coupled to the neutron sensitive scintillation media. The scintillation media may be disposed within the at least one optically transparent neutron absorptive material, which may be configured to prevent substantially all incident neutrons having an incident neutron energy below a selected energy threshold from reaching the media. The selected energy threshold may be approximately 0.2 eV. A neutron-reflecting material may be disposed within the scintillation media. The neutron-reflecting material may comprise a light guide optically coupled to the neutron sensitive scintillation media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.