Definition that contains drilling bit
- core bit a hollow drilling bit that is the cutting part of a core drill; allows core samples to be taken
- fishtail bit a drilling bit with cutting edges usually hardened against wear
- drilling fluid a mixture of clays and chemicals and water; pumped down the drill pipe to lubricate and cool the drilling bit and to flush out the cuttings and to strengthen the sides of the hole
- drilling mud a mixture of clays and chemicals and water; pumped down the drill pipe to lubricate and cool the drilling bit and to flush out the cuttings and to strengthen the sides of the hole
- blade bit a drilling bit with cutting edges usually hardened against wear
- drilling pipe a series of tubes (joined by screwed collars) that connect a drilling platform to the drilling bit; rotates the bit and supplies drilling mud