Radiant energy – Coded record and readers; invisible radiant energy type
Patent
1982-09-01
1985-03-26
Howell, Janice A.
Radiant energy
Coded record and readers; invisible radiant energy type
376162, G01V 510, G01N 23222
Patent
active
045075530
ABSTRACT:
An activation well logging method and apparatus for identifying and measuring the presence of vanadium in earth formations surrounding a borehole. A well logging instrument including a source of neutrons is used to irradiate formations for a period of time sufficient to activate vanadium. The gamma radiation emanating from the irradiated formations are detected by a scintillation detector having output pulses directly proportional to the energies of the incident gamma rays. The output pulses having energies characteristic of the element vanadium are separated and counted to provide indication of any vanadium present in the irradiated formations.
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patent: 3257557 (1966-06-01), Youmans
patent: 3294972 (1966-12-01), Youmans
patent: 3465151 (1969-09-01), Youmans
patent: 3662173 (1972-05-01), Youmans
patent: 3665195 (1972-05-01), Youmans
patent: 3746871 (1973-07-01), Kramer et al.
Fertl Walter H.
Oliver Donald W.
Byron Richard M.
Dresser Industries Inc.
Hannaher Constantine
Howell Janice A.
McCollum Patrick H.
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