Company Profile
Horizontal Directional Drilling HDD-Method Areas of operation Projects Environmental Technology Geothermal Exploration Hydrocarbon Exploration Equipment News Contact Imprint DrillTec GUT GmbH Josef-Wallner-Straße 10 D-94469 Deggendorf/ Germany   Phone: +49(0)991 37212-400 Fax: +49(0)991 37212-409 info@drilltec.de		HDD Method Pilot Hole: The initial hole drilled to the exacting standards of both horizontal and vertical control. Reaming: The controlled procedure of increasing the hole size to the required diameter. Pipe installation: Installation of the product pipe into the hole in one continuous pulling operation. Reload animation If you don't see the animation, please click here to download the Macromedia Flash plugin. Ground conditions will dictate the drilling procedure used with jetting for softer formations or a mud motor and drill bit for harder rock type formations. In both cases the pumping of a drilling fluid is required to suspend and carry material cut back to the surface. The advanced survey control systems combined with highly developed tools enable downhole drilling to progress along an accurately controlled path. With control of the drill path being continuously calculated and updated as the drill head is advanced, accuracy in reaching the target position is assured. For the reaming (hole opening) processes, equipment will be chosen with careful consideration for the ground conditions expected. A complete range of equipment is available for the hardest formations that could be encountered. The pumping of drilling fluid remains a key component in ensuring material as it is cut, is transported to the surface as reaming progresses. Completion of the pilot hole and reaming procedure will enable the pipeline installation to take place. Connection of the drill pipe to the pulling assembly ahead of the product line enables the pre welded pipeline to be pulled into the reamed hole. A continuous operation is completed when the pipelines leading end emerges at the drill rig position.