Definition that contains the drill
- shank cylinder forming the part of a bit by which it is held in the drill
- core drill a drill that removes a cylindrical core from the drill hole
- 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
- breast drill a portable drill with a plate that is pressed against the chest to force the drill point into the work
- 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