Roller reamer

A roller reamer is a special tool that helps make holes in the ground when you want to drill for oil or gas. It looks like a big, long stick with a bunch of little wheels all around it.

When the drilling starts, the roller reamer spins really fast like a merry-go-round. As it spins, the little wheels push against the sides of the hole and grind away any rough spots or obstacles that might get in the way of the drill going deeper. It's kind of like sanding down a rough piece of wood to make it smooth.

The roller reamer helps make the hole nice and smooth so that the drill can keep going down without getting stuck or having any problems. This helps the people drilling get to the oil or gas they're looking for deep underground.