Feature
July 2010 Vol. 237 No. 7
Field Coating Girth Welds On 10 Bundled Casing For 2,100-Foot HDD
Horizontal directional drills are commonly used when it’s either impractical or impossible to dig a trench, such as under a highway, body of water, or railroad. The basic process consists of drilling a pilot hole, reaming it to the appropriate size, and pulling the new section of pipe back through the bore.