Herrenknecht Horizontal Directional Drilling (HDD) rigs allow for a fast, inexpensive and environment-friendly installation of supply pipelines underneath obstructions. HDD operations are limited by the pipeline diameter, push force of the drilling equipment (HDD rigs) and geological conditions. Herrenknecht aims at gradually expanding the range of applications of HDD technology. The Pipe Thruster is an important step in this direction. The Pipe Thruster provides additional push force during the pullback of long pipe strings and plays a key role in the development of new tunnelling and pipeline construction methods.
So far the Herrenknecht Pipe Thruster has proven its versatility in several projects worldwide, for example:
Godavari River Crossing: India In 2007 Herrenknecht machines played an important role in one of the first complex sections of the East- West Gas Pipeline in India. 2,400 meters had to be excavated, interrupted at about the half-way point by an island which exists only in the dry season. The planned diameter of the protection tunnel for the installation of the 48-inch pipeline is 2.40 meters.
Pipeline Maintenance works on the US- Gulf Coast: In late summer 2008 the Herrenknecht Pipe Thruster celebrates its first successful deployment in North America. A total of 800m pipelines (42”) with poor quality had to be replaced by contemporary ones.
Rhine River Crossing, Worms, Germany: The 464m long culvert below the Rhine River was realized using the new Direct Pipe® method developed by Herrenknecht.