However, the very nature of HDD encourages the use of materials that can withstand the various loads and other variables present during the pullback cycle. Choosing the large diameter pipe material for the HDD methodĪ pipe can be made of materials like polyethylene, polypropylene, ductile iron, steel, and PVC-essentially anything capable of being pulled through the drill path. The choice of pipe material and standard dimensional ratio (SDR) will depend on the pressure, the service loads, and the pullback load. As the back reamer advances, it simultaneously increases the diameter of the drill path while also pulling the pipe into place ( 1). Now, a back reamer is attached to the boring rods and drawn back through the bore path. ![]() Once the bore head reaches the end of the path and breaks the surface, the final drill path is complete. This steerable boring method begins with creating a pilot hole drilled and steered along a prescribed pathway. While trenching and excavating methods are more straightforward, they can be impractical in modern use cases due to the environment (e.g., river crossing), landscape (e.g., ecological considerations), or socioeconomic impact (e.g., roads and homes).Įnter HDD, which enables very precise borings with shallow arcs capable of bypassing subterranean obstacles like other pipes or riverbeds. Benefits of using horizontal directional drilling for the installation of large diameter pipes Here we will discuss the benefits and uses of HDD installation for large diameter pipes and review a recent case study that demonstrates this method in action. When considering the installation of large diameter pipes, which can exceed a meter (39 inches) in diameter, a trenchless installation method can potentially solve a host of problems. HDD is a steerable trenchless technique of installing everything from pipe to cable with minimal construction footprint and minor impact on surrounding areas. Class A CDL is preferred.How do you install a large diameter pipe without damaging sensitive ecological environments or disrupting highly urbanized communities? Over the last two decades, contractors have increasingly turned to the horizontal directional drilling (HDD) method. Experience working and drilling in the Utility / Energy industry.Must be knowledgeable drilling in various soil conditions.Prefer prior experience operating or locating on various types of horizontal directional drilling equipment Ditch Witch, Vermeer, American Auger.Attend all safety meetings and trainings as required by the Company.Follow safe operating instructions that stay within compliance of the manufacturer’s specifications and the scope of the project.Immediately report any defects of the equipment to the Foreman and Superintendent.Complete daily equipment inspection reports for any/all equipment.Obtain necessary operator qualifications as required by the Company.Follow all established safety and OSHA rules and regulations. ![]()
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