A heavy, thick-walled tube, usually steel, used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a __________.
A
drill collar
B
tool joint
C
down hole tool
D
heavy-walled drill pipe
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Question 1 / 2066636ee728f7522a1c517d19
Question 1 of 2066636ee728f7522a1c517d19
A heavy, thick-walled tube, usually steel, used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a __________.
A heavy, thick-walled tube, usually steel, used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a __________.