<p>A drill tool assembly is disclosed. The drill tool assembly includes a drill bit and a solid lubricant. The drill bit has at least one main channel and at least one side channel. The at least one main channel is configured parallel to an operative axis of the drill bit. The at least one side channel is configured from the main channel to at least one flute of the drill bit. The solid lubricant is filled inside the at least one main channel and the at least one side channel.</p>
