Nuclear magnetic loggins

Details Nuclear magnetic loggins Nuclear magnetic loggins

1984-05-24

1986-12-16

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using well logging device

324318, G01R 3320

Patent

active

046299866

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.

REFERENCES:
patent: 2968761 (1961-01-01), Zimmerman
patent: 3597681 (1971-08-01), Huckabay
patent: 3617867 (1971-11-01), Herzog
patent: 4350955 (1982-09-01), Jackson et al.
patent: 4528508 (1985-07-01), Vail, III

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