Optimisation of Flow Distribution for Pipe Pullback in Horizontal Directional Drilling

Horizontal Directional Drilling permits the creation of tunnels which pass beneath rivers and canals to allow the passing of services from one side to the other. The final stage of this process involves lining the tunnel with a plastic or steel pipe. The pipe is pulled inside into the borehole using the same drilling rig that was used to bore...

Site Investigation based on Return Flow in Horizontal Directional Drilling - Marsdiep Project

The focus of this research is on samples taken from the return flow. With these samples and within the context of the Marsdiep project it is investigated if Horizontal Directional Drilling (HDD) can be used as a Site Investigation (SI) technique. In the Marsdiep project the feasibility of a pipeline constructed using HDD between the island Texel...

Stabilization of gravel deposits using microorganisms

One of the techniques used for the construction of underground infrastructure is horizontal directional drilling (HDD). This trenchless method is complicated when crossing gravel deposits as a borehole in coarse gravel tends to collapse, causing the drill pipe to get stuck or the failure of installation of the product pipeline due to exceeding...

Nieuwe boortechnieken kleine infra: Modelling the soil pipeline interaction during the pull back operation of horizontal directional drilling

The pull back operation is the most important stage of horizontal directional drilling (HDD). The cost of jammed pipelines, damaged pipelines and the costs for additional measures during and after the pull back operation can be considerable. Recently in the Netherlands several problems occurred during the pull back operation at some locations...

Maximum allowable pressures during horizontal directional drillings focused on sand

Horizontal directional drilling (HOD) is a rather simple installation technique for pipes for public infrastructure and it has therefore become increasingly popular. When HOD is started, a pilot drilling is made first; a small borehole is made in the soil along the trajectory. After the pilot drilling the borehole is enlarged with a reamer until...

Design of a directional drilling device and development of a new spinal anchoring technique