Iron Roughneck Commissioning

Iron Roughneck operation:
The backup wrench holds the lower drill pipe/drill collar, the spinning wrench makes up a connection, and then the makeup wrench makes up the entire connection with a bigger torque.
The backup wrench holds the lower dp/dc, the break out wrench breaks out a connection, and the spinning wrench breaks out the entire connection with a less big torque.
The wrenches from top to bottom are
Spinning tong, make-up tong (MUT) and backup tong (BUT)

Making up a connection

 

 

Breaking up a connection

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