Method for jetting, eroding and processing downhole steel ball

The invention provides a method for jetting, eroding and processing a downhole steel ball, an abrasive jet mode is adopted, the stuck steel ball and positions where the steel ball is in contact with a ball seat are downwardly jetted and eroded along a shaft axis, an internal drift diameter of the ball seat is enlarged or an internal diameter of the steel ball is reduced through erosion, and therefore constraint of the ball seat on the steel ball is released, and the steel ball can be returned to the ground by itself under the support of downhole liquid. Working efficiency and technology safety level can be largely improved by the method. 本发明提供了种喷射冲蚀处理井下钢球的方法，采用磨料射流方式，沿井筒轴线向下喷射冲蚀遇卡的钢球及钢球与球座的接触处，通过冲蚀扩大球座内通径或缩小钢球内径，从而解除球座对钢球的约束，使其可在井内液体的托举下自行返至地面，该方法可大幅度提高作业效率和工艺安全水平。