Abstract: In order to improve the surface smoothness of the weight coating layer of directional drilling pipelines,a series of innovative technologies were developed,including slurry spraying,improvements in leveling tools,pneumatic platen secondary leveling,and a two-step film coating and correction process. These technologies significantly enhance the surface smoothness of the pipelines,reduce frictional resistance during construction,improve construction efficiency and quality,and extend the service life of the pipelines. The effectiveness and practicality of these technologies have been verified through successful applications in multiple projects.

Key words: directional drilling, pipeline, weight coating layer, surface smoothness