Downhole Motor, Drilling Bit, Mud Motor manufacturer / supplier in China, offering 8-1/2" Downhole Mud Motor of Equal Wall Thickness for Oil Drilling Equipment for Deep-Well Operations, High Torque, High Precision Directional Well 6 3/4 "Downhole Mud Motor, Professional-Grade Oil Drilling Equipment Directional Drilling Construction of 9-5/8"Downhole Mud Motor and so on.