What is DRILL BIT?

The actual cutting or boring tool in a drill. In rotary drilling it may be of the drag variety, with two or more cutting edges usually hard-tipped against wear, roller with rotating hard-toothed rollers, or diamond, with cutting face annular if core samples are required containing suitably embedded borts the fig. shows the tricone design. The assembly is attached to the bottom of the drill pipe and rotated with it. Drilling mud pumped down the drill pipe cools, lubricates and carries away the debris. See panel on

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