Definitions for "DRILL STEM"
Keywords:  swivel, rotary, collars, assembly, pipe
See also drill string.
All the components that are connected together and form the assembly used to drill the well, usually condisered from the bottom of the top drive or swivel downward. Also called “Drill String” although the latter term is often used to refer to that part consisting only of normal weight drill pipe.
The drill pipe. In rotary drilling, the bit is attached to the drill stem or drill column which rotates to "dig" the hole.