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roller bit

   Also found in: Encyclopedia 0.01 sec.
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Noun1.roller bit - a drill bit that has hardened rotating rollers
drill bit, drilling bit - a bit used in drilling for oil


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In the most common drilling sequence, the four-coned tungsten-carbide roller bit that will cut into the seafloor is attached to the drill pipe along with its stabilizing weights.
 
 
 
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