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publicationDate 1982-10-05-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-4352674-A
titleOfInvention Method of tracing a well drilling mud
abstract In a method of tracing a well drilling mud by determining the concentration of a tracer ion in samples of filtrate from a drilling mud which contains a predetermined concentration of the tracer ion, the improvement wherein the tracer ion is the acetate ion and is present in the drilling mud in a concentration of about 1.10 -3 to about 5.10 -2 ions per liter.
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