Multi-azimuth nuclear magnetic resonance logging instrument and antenna excitation method
US10151852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2016 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Apr 27, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/383
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides a multi-azimuth nuclear magnetic resonance logging instrument and an antenna excitation method, the nuclear magnetic resonance logging instrument includes: a probe framework and a shielding layer arranged in the probe framework; a plurality of main magnets are provided above and below the shielding layer, respectively; central axes of the main magnets are parallel with each other, and distances between the central axes of each of the main magnets and a central axis of the probe framework are the same; a distance between central axes of any two main magnets is not smaller than a first preset value; and an antenna is provided at outer side of each main magnet, and a plurality of the antennas are fed independently. In the present invention, circumferential recognizing capability of the nuclear magnetic resonance logging instrument can be improved and three-dimensional (radial, axial and circumferential) stratum detection can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.