drill string


noun

(on a drill rig) the assemblage of drill pipes that link the drill bit to the mechanism that imparts rotary or reciprocating motion.

Origin of drill string

First recorded in 1695–1705

British Dictionary definitions for drill string

drill string

drill pipe


noun

(in the oil industry) a pipe made of lengths of steel tubing that is attached to the drilling tool and rotates during drilling to form a bore