terms:kelly
The heavy steel, pipe-like, four- or six-sided member suspended from the swivel through the rotary table and connected to the top-most joint of drill pipe which turns the drill stem as the rotary table turns. It has a bored passageway that permits fluid to be circulated into the drill stem and up the annulus, or vice versa. Sometimes called kelly joint.
terms/kelly.txt · Last modified: 2023/11/22 08:41 by 127.0.0.1