Encapsulated radioactive tracer
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United States of America Patent
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Jul 27, 1999
Issued Date -
N/A
app pub date -
May 20, 1997
filing date -
Aug 18, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Radioactive particles are provided for use in tracing the flow path in or near a well of fluids injected into the well. The particles include an element which can be made radioactive by bombardment with neutrons and a material to encapsulate the element. The encapsulant is preferably an organic polymer having a high softening temperature. The particles may be injected into a well in treating fluids and their location may be later determined by gamma ray logging of the well.
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