How Directional Drilling Works
Directional drilling is a trenchless method used to install underground pipes, like sewer and water main lines.
In this method of pipeline installation, a horizontal boring machine establishes what is called a pilot hole where a hollow pipe can be inserted into the ground. This continues for each new section to prep the area for the entire line.
Once the pilot hole is complete, it is enlarged for the new line. A reamer is used to enlarge the hole, providing further prep and clearing the area for the new line. The enlarged pilot hole needs to be 25% larger than the line to ensure that there is no issue running the pipe through. Finally, the new line is pulled through the prepared opening, establishing the pipeline.