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GLOSSARY

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Tag-Robinson Colorimeter

An instrument used to determine the color of oils. Also a scale of color values.

TBN

Total Base Number. ASTM D2896. This is measured in mg. KOH needed to neutralize an acidic solution through a reverse titration. TBN is the ability of the product to neutralize acid. In a motor oil, this is a property which allows the oil to neutralize acids from combustion that would otherwise degrade the oil.

Thermal Value

Calories per gram of BTU per pound produced by burning fuels

Toolpusher

Foreman in charge of the drilling and rig operations and crew members

Topped Crude Oil

Oil from which the light ends have been removed by a simple refining process. Also referred to as "reduced crude oil".

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