... the opening of the first, free undocked from the drill pipe, mobile. 7. Main dorsal clamp and clamp ... pliers and spin rope hoists, and avoid the high torque drill pipe bending under the possibilities and prevent it from ... the first to have the greatest positive and negative torque and rotational speed. 9. Automatic clamping in the ... of pliers. 11. Optional hydraulic hoists extinguishers. drill pipe clamp