Radiant energy – Calibration or standardization methods
Patent
1982-04-02
1985-01-15
Howell, Janice A.
Radiant energy
Calibration or standardization methods
250256, G01V 500
Patent
active
044939981
ABSTRACT:
In the preferred and illustrated embodiment taught herein, method steps for monitoring of raw materials to be used in drilling mud are disclosed. The materials are monitored for radioactivity. Procedures for taking such measurements are disclosed, and the extent of gamma radioactivity in the raw materials used in drilling mud is determined. This is correlated to the increased radiation attributable to mud made from these materials and the effect the mud would have on gamma ray measuring logs. An alternate procedure for testing drilling mud, typically at the well site, is also disclosed. The method detects mud radioactivity from any additives including barite, potassium chloride, well cuttings or others. Excessive background levels due to mud gamma radioactivity in a well may very well mask the data obtained by various logging procedures dependent on gamma radiation. Procedures are also described for either rejecting mud which is too radioactive or correcting the log measurements for mud effects.
REFERENCES:
patent: 3038076 (1962-06-01), Scherbatskoy
patent: 3435215 (1969-03-01), Pritchett
patent: 4378498 (1983-03-01), Givens
Arnold Dan M.
Schultz Ward E.
Smith, Jr. Harry D.
Beard William J.
Halliburton Company
Howell Janice A.
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