Horizontal Directional Drilling Services (HDD)

Directional boring, also known as horizontal directional drilling (HDD), uses a surface-launched rig to install underground utilities in a shallow arc. This steerable, trenchless method minimizes surface disruption and is ideal when excavation is impractical, safely navigating under roads, landscapes, and rivers. 

The process typically consists of three key steps: 

• Pilot Hole: A small-diameter, steerable hole is drilled along the predetermined path using geotechnical sensors.
• Pre-Reaming: The initial hole is enlarged (back-reamed) to accommodate the specific diameter of the conduit or pipe.
• Pipe Pullback: The new pipeline or cable is securely pulled back through the enlarged borehole. 

Throughout this process, drilling fluids are continuously pumped into the borehole to stabilize the soil, remove cuttings, and cool the drill head. It is highly favored for congested urban environments and environmentally sensitive zones because it entirely eliminates the need for open-cut trenching.