Nuclear magnetic loggins
US4629986A · kind A · utility
43Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 1984 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | May 24, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An elongated probe suitable for lowering down a borehole for nuclear magnetic logging has a pair of similar cylindrical magnets 1 and 2 separated by a gap in which a solenoid 3 is symmetrically disposed. The solenoid has a core 4 of high permeability ferrimagnetic material and has a length preferably equal to half the length of the gap. The magnets 1 and 2 and solenoid 3 with its core 4 are contained within a hollow cylindrical casing 5 of non-magnetic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.