Epithermal neutron lifetime logging

Details Epithermal neutron lifetime logging Epithermal neutron lifetime logging

1983-04-07

1985-12-03

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

250269, 250390, G01T 300

Patent

active

045567930

ABSTRACT:
A radioactive borehole logging tool employs an epithermal neutron detector having a neutron counter surrounded by an inner thermal neutron filter and an outer thermal neutron filter. Located between the inner and outer thermal neutron filters is a neutron moderating material for extending the lifetime of epithermal neutrons to enhance the counting rate of such epithermal neutrons by the neutron counter.

REFERENCES:
patent: 2680201 (1954-06-01), Scherbatskoy
patent: 3102198 (1963-08-01), Bonner
patent: 4005290 (1977-01-01), Allen
patent: 4152590 (1979-05-01), Smith, Jr. et al.
patent: 4241253 (1980-12-01), Allen et al.

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