A special device that, when fitted into the rotary table, transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make the hole is called a __________.
A
kelly slips
B
kelly bushing
C
master bushing
D
rotary bushing
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Question 1 / 2066636ee728f7522a1c518a0a
Question 1 of 2066636ee728f7522a1c518a0a
A special device that, when fitted into the rotary table, transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make the hole is called a __________.
A special device that, when fitted into the rotary table, transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make the hole is called a __________.