What is the difference between drill pipe and drill collar?
Date:2020-11-03 Tag:What is the difference between drill pipe and drill collar?
While drill pipe makes up the majority length of a drill string, drill collars make up only a small amount. ... In contrast, to drill pipe, drill collars are thick-walled and heavy, with very limited flexibility. Drill collars are used at the bottom of the drill string, just above the drill bit.
