Horizontal Directional Drilling (HDD)

Horizontal Directional Drilling (HDD)
This technique is ideal for the installation of small to medium diameter pipes and ducts on a straight or curved alignment. It is used extensively by the gas, water, telecoms and electricity industries.

The process is a quick and effective means of installing single or multi pipes and ducts from 25mm to 900mm diameter.

We pride ourselves in offering a service that leaves environmentally sensitive landscapes unscathed during the directional drilling process.

By using our large fleet of steerable direction drilling rigs, we can provide a precise and controlled bore in which the final product pipe(s) can then be pulled to completion.

Distances: Pipe lengths up to 400 metres.

Installation rates: Up to 200 metres per day dependent on the required diameter and the ground conditions.

Accuracy: +/- 50mm Ground dependent.

Chiltern Thrust Bore are a Horizontal Directional Drilling company with over 20 years in the field, installing pipes for various applications beneath items such as:

  • Roads
  • Various watercourses including major rivers
  • Railways.
  • Runways and taxiways
  • Coastal sea defences
  • Environmentally sensitive areas
  • Embankments/bunds etc…

the list goes on!

Advantages of Horizontal Directional Drilling

  • Quick, efficient and therefore economic/cost effective
  • No disruption to the surface infrastructure or services
  • Unaffected by surface obstacles
  • Cost effective and time saving alternative to open cut methods when installing pipes amidst extensive underground infrastructure or at significant depths
  • Relatively small overall footprint for the Works
  • Pipework and cables can be installed in either a straight or curved alignment to help avoid underground complications and services.
  • HDD requires no deep excavations due to the equipment that is used.
  • Can be used for gravity gradient installations where the required grade and ground conditions allow
  • A reduced requirement for possessions, road closures, opening notices etc, if required.
  • A reduced requirement for restricted working hours
  • A reduced requirement for premium rate working


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