The Horizontal Directional Drilling Process
The Horizontal Directional Drilling Process The tools and techniques used in the horizontal directional drilling (HDD) process are an outgrowth of the oil well drilling industry. The components of a horizontal drilling rig used for pipeline construction are similar to those of an oil well drilling rig with the major exception being
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www.hse.gov.ukHorizontal directional drilling (HDD) rigs These are a form of trenchless technology gaining in popularity due to the ability to insert utilities pipes without the need to excavate along the route. Pipelines of over 1m diameter can be installed by large HDD rigs using multiple passes to ream out an initial small diameter hole. Whilst it is