Trenchless Portfolio

Horizontal Directional Drilling, or HDD as it is commonly referred to, is a surface launched, steerable trenchless method whereby a pilot hole is drilled along a designed trajectory. Pressurized drilling fluid within the borehole conveys the cuttings to surface. Once the pilot hole is complete, the borehole is enlarged by passing a reaming tool through the borehole until the desired diameter is reached.

Direct Steerable Pipe Thrusting, also known as Direct Pipe combines advantages of microtunneling and HDD technology. In a single step, a prefabricated pipeline can be installed, and the required borehole diameter can be excavated simultaneously. The boring machine and pipeline are advanced using a thruster which clamps around the circumference of the pipeline.

Microtunneling is a remotely-controlled, continuously supported pipe jacking method. Soil excavation takes place in a closed loop by way of infusing the soil with slurry at the boring machine face. The machine is shaft launched and advanced with hydraulic jacks.

Auger Boring, often referred to as “jack and bore”, is a method of installation that simultaneously jacks casing while rotating helical augers within the casing to remove cuttings. Hydraulic jacks located on the bore machine at the launch shaft provide the thrust that advance the casing along the crossing alignment.

Pipe Ramming is used in a wide variety of soil types including gravel, cobble or sand. A pneumatic hammer is attached to the back of the casing pipe and driven through the material at any angle: from horizontal to vertical. The material is cleaned out of the pipe using an auger boring machine.