The Reaming Bit accepts a temperature of about 250 degrees. It is a new type of high-temperature, wear-resistant grease. While the relative linear velocity of the bearing pair is reduced, the temperature rise of the friction surface is eliminated, which can effectively improve the quality of drilling or the bearing life and reliability of the bearing under the conditions of high-speed drilling technology. Finally, the all-rubber oil storage bag that can limit the pressure difference and guard the drilling fluid to enter the lubrication system is adopted to provide a good lubrication guarantee for the bearing system. The steel ball locks the cones to comply with the high speed.