When launching HDD bores through inconsistent or shallow surface layers, the risk of frac-out can jeopardize both the environment and project schedule.
Safe Starts for HDD in Difficult Soils
When launching HDD bores through inconsistent or shallow surface layers, the risk of frac-out can jeopardize both the environment and project schedule. Geonex Horizontal Hammer Boring (HHB) offers an effective solution by installing steel-cased conductor barrels directly to bedrock or a stable layer—creating a controlled and secure starting point for the HDD process. Frac-out occurs when drilling fluids escape through weak or fractured soil layers, often due to insufficient cover depth or variable ground conditions. These challenges can lead to environmental damage, extra permitting, or costly delays. By boring a conductor barrel first, the HDD drill string is launched in stable ground, minimizing the risk of fluid loss.
Geonex Horizontal Hammer Boring (HHB) offers an effective solution by installing steel-cased conductor barrels directly to bedrock or a stable layer—creating a controlled and secure starting point for the HDD process.
HHB Enables Fully Cased Entry Without Fluid Support
Geonex’s HHB method uses a pneumatically driven hammer at the bore front to pull the casing as it advances—requiring no jacking force, thrust wall, or fluid-based stabilization. The result is a clean, single-pass installation of a steel casing with consistent grade and alignment—even through fill, boulders, and soft soil.
Once the conductor casing is in place, the HDD operation starts with greater accuracy and confidence. Only the pilot bit and low-cost consumables remain in the ground, and the reduced setup time, minimal excavation, and fluid-free boring translate into lower total project costs. Geonex HHB covers diameters from 5” to 48”, making it suitable for a wide range of HDD entry applications.