The oil industry to use a drilling apparatus includes a slurry pump, winch, top drive, crane and so on. Working conditions: heavy load, silt, corrosion resistance, large impact vibration. BNS provides the deep groove ball bearings, aligning roller bearings, cylindrical roller bearings, tapered roller bearings, thrust cylindrical roller bearings, through strengthening design and manufacturing, increase load capacity, improves the corrosion resistance and shock resistance performance, prolongs the service life of the bearing.