drill string
The drill string, also called the drillstem, is the combination of the drill pipe, the bottomhole assembly (BHA), and any other tools used to make the drill bit turn at the bottom of the borehole.
The drill string, also called the drillstem, is the combination of the drill pipe, the bottomhole assembly (BHA), and any other tools used to make the drill bit turn at the bottom of the borehole.
