دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: all members in the assembly used for rotary drilling from the swivel to the bit, including the kelly, the drill pipe and tool joints, the drill collars, the stabilizers, and various specialty items. Compare drill string

n: All the components from the swivel down to the bit.

typically, rotating components in a drill string.

n pl: those parts of the drilling or workover rig that are designed to turn or rotate the drill stem and bitswivel, kelly, kelly bushing, master bushing, and rotary table.

n: The components be used to drive the drill string and bit when drilling and workover.