water bore hole drilling HDD reamer tricone bits opener
Horizontal Hole Openers, also known as HDD Reamers, are used to enlarge the pilot hole in
Horizontal Directional Drilling(HDD) - HDD is used when trenching and excavating is not practical.
This drilling technology allows for a steerable trenchless way to drill underground.
There are three stages:
1>the first stage is to drill a small diameter pilot hole.
2>The second stage is enlarge the hole with a larger diameter cutting tool called an HDD Reamer,
Rock Reamer or Hole Opener.
3>The third stage is inserting the casing pipe or other product into the enlarged hole.