Drill line
（重定向自Drilling line）
![](/Images/godic/202501/10/Crown_block2348.jpg")
![](/Images/godic/202501/10/Traveling_block_and_swivel2348.jpg")
![](/Images/godic/202501/10/Drill_line_on_drum2348.jpg")
In a drilling rig, the drill line is a multi-thread, twisted wire rope that is threaded or reeved through the traveling block and crown block to facilitate the lowering and lifting of the drill string into and out of the wellbore.
On larger diameter lines, traveling block loads of over a million pounds are possible.