A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the ______.A.liftsB.collarsC.elevatorsD.clamps
A set of clamps that are latched onto the drill pipe to allow the driller to raise or lower the drill string out of or into the hole are the ______.
A.lifts
B.collars
C.elevators
D.clamps
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