If the pigging period is too long, the inhibitor coating will be destroyed, caus-ing the increase of the corrosion speed and the reduction of the efficiency of the gathering and transportation pipeline system, which will threaten the safety and the efficiency of the pipe-line system. To improve the efficiency of the gathering and transportation pipeline system and to reduce the corrosion speed, the inner wall of the gathering and transportation pipeline should be cleaned regularly and the batch coating is carried out. If the pigging operation and the batch coating is carried out too frequently,the total amount of natural gas will be reduced and the production cost will rise up. At the same time, the intensity of labor will be raised. Through the failure analysis of the oil soluble corrosion inhibitor and the corrosion data, the pigging cycle is optimized for 35 days.Under the premise of the effective control of the cor-rosion rate of pipeline, we can reduce the cost of the pigging operation, shorten the period of the pipeline outage, bringing significant economic benefits and guaranteeing the smooth operation of the gathering and transportation pipeline system.%长时间运行的湿气管道，会造成缓蚀剂涂膜破坏、腐蚀速率增加、管道输送效率降低，影响集输管网的安全高效运行。为提高系统效率并减缓腐蚀，普光气田对集输管道内壁定期进行了清管和批处理涂膜作业，然而频繁地进行清管和批处理作业将影响气田的产气量，同时还增加现场操作人员的劳动强度和生产成本。通过对油溶性缓蚀剂的失效规律进行分析，并结合气田腐蚀数据，将清管周期优化为35 d，在有效控制管道内腐蚀速率的前提下，降低了清管作业费用，减少了管线停运时间，取得了显著的经济效益，并保障了集输系统的平稳运行。
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