Rotary Rig Friction Kelly Bar

الوصف

3D design analysis,test with simulate compression and torque through the computer technology

Inter Key,reasonable steel pipe design, ensure each layer of steel pipe inter and outside key thickness well- distributed.use whold arc board structure for inter key and keep one meter steel pipe without cutting and intall the whole steel pipe for the inter key, it can reduce the break down ratio of kelly bar.and the material of shock ring is made in ammerican