In addition to its role in protecting equipment above the Kelly in the case of a kick, what else can the lower Kelly cock be used for?
A lower Kelly cock can prevent mud from flowing into the well if pressures are too high
The lower Kelly cock can be used to keep mud from falling out of the Kelly when the Kelly is broken out to make a connection
A lower Kelly cock can deliver the mud into special chemical tanks so that chemicals can be added
A lower Kelly cock can be used to hold onto a mud sample if testing needs to be done
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