terms:collar
(1) A coupling device with internal threads used to join two pieces of threaded pipe of the same size.
(2) Drill collar. A thick walled steel pipe used to stabilize the bottom-hole drilling assembly. The drill collars are used to provide the weight required to drill the hole. The collars are usually under compression while the drill pipe is always under tension.
terms/collar.txt · Last modified: 2023/11/22 08:40 by 127.0.0.1