Drilling Industry Glossary
CaCl2 weight
calcium, total hardness
cased hole
casing
casing centralizer
casing coupling (collar)
casing hanger
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
circulation sub
coarse LCM
coiled tubing
collapse pressure
completion
completion fluid
concentration
conductivity
conductor pipe
contractor
critical rate
critical velocity
crooked hole
crossover sub
crude oil
cuttings
Cement
A powder consisting of alumina, silica, lime, and other substances that hardens when mixed with water. It is used extensively to bond casing to the walls of the wellbore.

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