Oilfield Glossary
Oilfield Glossary
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sack

1. n. [Drilling Fluids]
A unit of measure for portland cement. In the United States, a sack refers the amount of cement that occupies a bulk volume of 1.0 ft3. For most portland cement, including API classes of cement, a sack weighs 94 pounds. The sack is the basis for slurry design calculations and is often abbreviated as sk.