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.

all components in a rotary drilling assembly from the swivel to the bit. Drill Stem Testing - A method of determining the potential productivity of a subsurface formation in either open or cased hole.

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.

The drill stem is comprised of the drill pipe, drill collars, bottomhole assembly, and drill bit. The drilling fluid is pumped down this pipe at a desired pressure and then jetted out the bit.