Drilling Industry Glossary

cable tool CaCl₂ weight calcium, total hardness cap rock cased hole casing casing centralizer casing coupling (collar) casing hanger casing head casing point casing pressure casing shoe casing string casing wear cement cement additive cement bond cement bond survey cementing cementing pump chlorides chlorides whole mud choke choke line christmas tree circulate circulation sub close in coarse LCM coiled tubing collapse pressure complete a well completion completion fluid concentration condensate conductivity conductor pipe contract depth contractor core cratering critical rate critical velocity crooked hole crossover sub crude oil cuttings

Calcium Chloride Weight

CaCl₂ wt.(%) = (weight of CaCl₂)/(weight of mud) . CaCl₂ (mg/L) is the amount of CaCl₂ in mg per liter of mud. CaCl₂ brine is a crucial additive in oil and synthetic based mud because of its improvement of wellbore stability in water-sensitive shale zones.

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