本powerpoint演示文稿首先简要概述了水平定向钻井（HDD）和HDD过程，包括以下步骤:步骤1-导向孔；第2步-铰孔；第三步，向后拉。介绍了HDD设备，以及HDD市场分析和市场增长、HDD优势和产品材料，以及设计注意事项。本文提供了使用HDD技术的三个例子。

This powerpoint presentation begins by providing a brief overview of Horizontal Directional Drilling (HDD) and the HDD process including the following steps: Step 1 - pilot hole; Step 2 - ream; and, Step 3 - pull-back. HDD equipment is presented, along with HDD market analysis and market growth, HDD advantages and product materials, and design considerations. Three examples of using HDD technology are provided.