After the completion of the pilot hole, hole opener drilling the drill holes should be extended to the appropriate pipe diameter to facilitate the installation finished, a process known as pre-reaming, (depending on the pore size of the final decision reaming times). Typically, the rig across the reamer is connected to the drill pipe, then dragged by the rig rotated back to the guide hole, the guide hole to expand,Platform Drilling Robot  but to a lot of mud pump into the borehole, drilled in order to ensure the integrity and non-landslides, debris and cut back under the ground.