Methods and devices for magnetic resonance measurements using decoupled transmit antennas
US10802176B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 14, 2017 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Jan 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3808
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A nuclear magnetic resonance apparatus includes a magnet assembly, a transmitting antenna configured to generate an oscillating magnetic field in a sensitive volume within an earth formation, and one or more receiving antennas configured to detect a nuclear magnetic resonance signal originating in the sensitive volume. The one or more receiving antennas are arranged relative so that the one or more receiving antennas are inductively decoupled from the transmitting antenna, a first portion of the surface area of the one or more receiving antennas overlapping a first region of the transmitting antenna in which a magnetic flux of the transmitting antenna is in a first direction, and a second portion of the surface area of the one or more receiver antennas overlapping a second region of the transmitting antenna in which the magnetic flux is in a second direction predominantly opposed to the first direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.