Drilling free blind plate device

The utility model relates to a drill free blind board device, which is applied by a moveable well hanged slit liner bushing and belongs to the petroleum artesian well field. The utility model contains an upper connector(1), a blind board(2) and a lower connector(3); wherein the upper connector(1) is connected to the lower connector(3). The utility model is characterized in that: the blind board (2) is positioned between the upper connector (1) and the lower connector (3); the utility model can ensure the success of seat hanging in airtight pressure and the requirements of the tube colluding route; moreover, the utility model can reduce the removing procedure of a bradawl, reduce operation disk, shorten well building period and can greatly enhance drilling efficiency.