Abstract: Sudan oil pipeline will pass through Nile 45 km away north of Al Khartoum. The mainly distributed strata at river bed includes medium sand, peddle and Nubia sandstone. Based on the features of geomorphology and strata in the crossing area, the Nubia sandstone is selected to be the surrounding rock. This paper analyzes the drillability, hole-making and carry of coarse grain concerning the Nubia sandstone, and concludes that it is suitable to be the crossing strata.