Petroleum Pipeline Crossing with Directional Drilling Technique

Directional drilling technique is systematically illustrated in this paper, including the composi- tion of directional drilling machine, determinations of crossing position, crossing stratums and buried depth of the pipeline, selection of entering and exiting ground points as well as the design of crossing curve. The calcu- lation of back-towing force and corresponding parameters are also analyzed. Based on practical experience in di- rectional drilling construction, the matters for attention in design phase and proposal for reference are provided.