Recently, the temperature in north China has gradually risen, and Yanchang Oil and Gas No.1 Company Yongping Station organized safety and equipment management personnel to carry out regular water drainage maintenance operations for manual ball valves in the field. According to the equipment maintenance standards, the operators start from the four aspects of improving the technical status of the equipment, restoring the technical performance of the equipment, ensuring the safety of the equipment and improving the maintenance of the equipment, check hidden dangers, input data, and make sure that no valve is missing.