Horizontal Directional Drilling Method for Pipeline Crossing (NK-RAPID)

摘要

Horizontal directional drilling (HDD) of a pipeline crossing is done by drilling an arched hole from the ground surface along a specified path beneath obstructions, followed by pulling the pipeline through the hole. The HDD method was introduced to NKK from the Cherrington Corporation in the USA under a technical transfer agreement. NKK named this method "NK-RAPID " and used it for a pipeline crossing in Hong Kong. This paper presents an outline of NK-RAPID and the Hong Kong project undertaken by NKK.