HDD PROCESS

The HDD process includes several steps, beginning with boring a small pilot hole underground with a continuous string of drill rods. Once the pilot hole is complete, a cutting tool called a back-reamer is attached and pulled back through the pilot hole. Several passes usually occur, depending on the diameter of the installed pipeline. Finally, the new pipeline is pulled back through the cleared pathway, and installation is complete.

In addition, the actual HDD construction process can often be quicker than installation by standard open cut trenching and backfilling. Horizontal directional drilling construction is faster, as it avoids conflicts like existing utilities that slow down traditional trenching and backfilling construction. Combined with a more streamlined permitting process, HDD can significantly shorten a project schedule and, potentially, reduce its budget.

HDD has several benefits, including:

• Durability;

• Faster installation;

• Potentially lower project cost;

• Less community and environmental disruption; and

• Fewer permitting issues