钻杆在井内套管柱中段旋转，长期以来被公认为是套管内壁磨损的主要原因。由于现今的并更长更深，两者长期接触使套管磨损更为严重。可疑的磨损位置是在井身上部的狗腿和“摆动”处。钻柱的高拉伸载荷使得钻杆对着套管旋转，其产生的力可达44kN。钻杆接头粘住并擦伤套管壁，形成 Drill pipe rotation in the middle of the casing string, has long been recognized as the main reason for casing wear. Due to today’s and longer and deeper, long-term contact between the two casing wear even more serious. Suspected wear location is in the well above the dogleg and “swing ” Department. The high tensile load of the drill string causes the drill rod to rotate against the bushing, which generates forces of up to 44 kN. Drill pipe joints stick and scratch the casing wall to form