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室内实验表明，塑料球粒度分布对其防卡效能的影响，集中表现在２．０～０．５６ｍｍ（１０～３０目）粒径球所占比例上；特别是２．０～１．０ｍｍ粒径球的比例愈高其防卡能力愈强。冀中油田及冀东油田８３口定向井应用证实，钻井液用固体润滑剂塑料球大、小粒度球各占５０％左右可以满足定向井防卡及润滑的要求。以两口典型井为例，说明规范塑料球的粒度分布是解决防卡和润滑关系的正确途径，效益显著
Laboratory experiments show that the influence of particle size distribution of plastic balls on its anti-jamming performance is concentrated on the ratio of particle size spheres of 2.0 to 0.56 mm (10 to 30 mesh), especially 2.0 to 1.0 mm The higher the proportion of trackball, the stronger its anti-jamming ability. The application of 83 directional wells in Jizhong Oilfield and Jidong Oilfield proved that each of the large and small particle balls of the solid lubricant for drilling fluid can meet the requirements of anti-card and lubrication of directional wells. Taking the two typical wells as an example, it shows that the specification of the particle size distribution of plastic balls is the correct way to solve the relationship between anti-jamming and lubrication, and the efficiency is significant