The significance of using horizontal directional drilling in utility services

摘要: Horizontal directional drilling (HDD) was established for the installation of pipes, conduits, and cables. The HDD industry is divided into three major sectors—large-diameter (Maxi-HDD), medium-diameter (Midi HDD), small-diameter (Mini HDD). Drilling pipe are done in two or steps; drill hole install pipe. It also has many features application range such as expense, high execution, minimal reclamation costs, higher speed on operation etc. In contrast, there disadvantages which can effect to decrease using field services. For example, taking time, solid control problem estimating mud flow some difficulties this method. However, it more advantages compare trench methods, but need make a guide book decreasing problems.