Horizontal Directional Drilling

Horizontal Directional Drilling (HDD) is a steerable, trenchless directional boring method of installing underground pipes, conduits and cables in a shallow arc along a prescribed bore path by using a surface launched drilling rig. Horizontal Directional Drilling minimises environmental disruption and impact upon the surrounding area, and is used when trenching or excavating is not practical.

Gleed Services Limited are experts in Horizontal Directional Drilling, which is suitable for a variety of soil conditions and jobs including road, landscape, Network Rail and river crossings. We can source pipes made from materials such as PVC polyethylene, ductile iron and steel.


  • has a broad application range
  • provides less traffic disruption and reduces the need for detours, temporary signal systems, road blockings, etc
  • is cost-effective
  • can accommodate deeper and longer installations
  • guarantees a shorter project completion time
  • provides a range of directional capabilities
  • is environmentally safe

The use of horizontal directional drilling (HDD) has become widespread for the installation of many types of utility services including electric lines, water lines, gas lines, and fibre optic. The minimal amount of surface disruption incurred and reduced restoration required when utilizing HDD makes it a desirable solution for many installations. One type of service where HDD has been less commonly used is for the installation of gravity flow sewers, particularly those whose grade is less than 1%. This is largely due to the difficulty in maintaining accurate line and grade throughout the pilot bore and pullback portions of the installation. Nevertheless, HDD is a viable alternative for many gravity sewer installations.