Nuclear magnetic resonance tool with movable magnets
US8860413B2 · kind B2 · utility
4Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 2011 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Oct 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3808
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems are provided that enable logging while drilling NMR measurements to be made with a tool having magnets with positions adjustable or movable relative to each other. Such movement can affect the depth of investigation of the NMR tool. A variety of moving assemblies can be used to effectuate the movement, which can be performed either at the surface or downhole. The tool also can include a magnetically permeable member to control the magnetic field gradient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.