JJournal of the Brazilian Society of Mechanical Sciences and Engineering5/23/2026Study on the influence of wellbore trajectory parameters on drill string friction in stepped horizontal wellChangshuai Shi·Hanhao Wang·Yuanhao Zhao·Xiaohua Zhu·Feilong ChengRead at Journal of the Brazilian Society of Mechanical Sciences and EngineeringTagsDrilling and Well EngineeringOcean Engineering