Horizontal directional drilling is a technology allowing drill in three dimensions. It can be literally moved the drillhead up, down, left or right underground. This is accomplished by drilling a pilot bore into the ground at an angle and then leveling out at a specified depth.

Once the proper depth has been reached, the pilot bore is typically advanced horizontally a specified distance and then back to the surface. In case of face with an obstacle at underground such as existing lines or very hard formations, profile can be modify to achieve the obstacle without pulling the drill stem out of the hole.

Please click the " ►(play) " button below to watch three dimentional Hdd animation.

 

Hdd is modified from oil industry which is the world's biggest voluminous market. That's why it has an enormous R&D power. Hdd is adapting oil industry's high-tech methods that has been using for years for underground activities. Hdd may be one of the most powerful area in construction market.

Although there are currently no national standards regarding HDD installations for any pipe material, HDD pipeline installations are becoming more and more common and may be the fastest growing trenchless construction method today. They can be used to install new pipelines or replace existing ones.