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  4. July 2010 Vol. 237 No. 7
  5. Field Coating Girth Welds On 10 Bundled Casing For 2,100-Foot HDD
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.

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