Drilling equipment used in petroleum industry includes mud pump, winch, top drive, crane, etc. Working conditions: heavy load, more sediment, strong corrosiveness, large impact vibration. The self-aligning roller bearing, cylindrical roller bearing, tapered roller bearing and thrust cylindrical roller bearing provided by Wafangdian Xiangli Precision Bearing Manufacturing Co., Ltd. have increased the load capacity, improved the anti-corrosion and anti impact performance, and extended the service life of the bearing by strengthening the design and manufacturing.