Horizontal directional drilling (HDD) is a valuable trenchless technology, perhaps most at home in utility construction but also with growing potential in pipe repair and replacement scenarios. It is an efficient and highly accurate method of tunneling from Point A to Point B without disturbing the surface and while avoiding buried utilities. Here are a few recent innovations in HDD drills and tools, as described by leading industry manufacturers.Mighty mini-jetThe TERRA Mini-Jet from TERRA of Switzerland, an ISO 9001-certified manufacturer, comes in compact or long versions. Able to turn 90 degrees in 50 feet, the units can be surface-launched or
