A method of testing the presence of uranio mineral in natural terrestrial formations through a polling well. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements introduced in the object of the main patent no. 417,355 requested on july 28, 1973 by: "a method of testing the presence of uranium ore in natural land formations crossed by a borehole" comprising: (a) traversing said rock section with a logging tool disposed in said well and operating therein a neutron source so as to radiate adjacent rock material, in a plurality of places along said perforation, with intense repetitive discharges of fast neutrons spaced by time intervals that are greater than the time necessary for the dissipation of neutrons originating in said intense discharges, (b) during time intervals comprised between said intense discharges, and after the time necessary for the dissipation of neutrons originating in said intense discharges operate a detector to detect radiation associated with delayed neutrons that result from the fis uranium ion by neutrons, (c) recording the radiation detected in stage (b) in correlation with the depth in order to obtain a recognition profile by means of which areas of interest suspected of containing uranium ore can be identified, (d) then irradiate an area suspected to be a carrier of uranium ore with repetitive intense discharges of fast neutrons spaced at time intervals that are greater than the time needed for the dissipation of neutrons originating from such intense discharges, and continue the irradiation of said zone for a relatively long period of time compared to the irradiation period of said zone in step (a), (e) during the time intervals between said intense discharges and after the time necessary for dissipation of neutrons originating in these intense discharges, operate a detector to detect radiation associated with delayed neutrons resulting from the fi of uranium by neutrons, and (f) recording the radiation, detected in step (e), in order to obtain a test profile that represents quantitatively the uranium content of said zone. (Machine-translation by Google Translate, not legally binding)