Radioactive tracer method and apparatus for boreholes
Patent
·
OSTI ID:4369193
Improved well-logging apparatus is provided which employs a long-lived radioactive material for tracing the flow path of fluid traveling in a subterranean borehole. The radioactive source is a porous capsule containing a long-lived parent isotope in a granule form incapable of permeating the wall of the capsule, but producing a non-granulated daughter product having a short half- life. A flush of solvent is passed through the capsule and into the borehole to dissolve away the daughter product and to redeposit it in the borehole. Hence, the long-lived parent isotope is kept from contaminating the borehole, and only the short-lived daughter product is used which disappears in a relatively short interval. (Official Gazette)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-29-007882
- Assignee:
- to General Nuclear, Inc.
- Patent Number(s):
- US 3766388
- OSTI ID:
- 4369193
- Country of Publication:
- United States
- Language:
- English
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