Magnet arrays for magnetic resonance measurements
US10082594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2015 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/448
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Nuclear magnetic resonance apparatuses and methods for estimating properties of an earth formation are provided. An apparatus includes a carrier configured to be deployed in a borehole, at least one transmitting assembly configured to generate an oscillating magnetic field in a volume of interest within the earth formation, at least one receiving assembly configured to detect a nuclear magnetic resonance (NMR) signal originating in the volume of interest; and a magnet assembly configured to generate a static magnetic field in the formation from a primary side of the magnet assembly. The magnet assembly includes an array of longitudinally elongated magnets having a rotating pattern of magnetic orientations, the array configured to generate the static magnetic field in the volume of interest, and the static magnetic field strength is higher at the primary side than the field strength at a side of the magnet assembly that is opposite the primary side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.