Segment-type well completion method

The invention relates to a drilling and well completion method for petroleum, natural gas, shale gas and coalbed methane, in particular to a segment-type well completion method. The method comprises the following steps: conducting the complete drifting process before tripping in a well completion pipe string, and recording the blockage condition in the drifting process; designing the well completion pipe string into a plurality of segments according to the blockage condition in the drifting process; drifting in the first segment, which is provided with guiding shoes, of the well completion pipe string to the position as deep as possible, preferably to the designed well depth, and then releasing hands and taking out a feeding drill tool. The method realizes that when the smoothness of the lower well cannot be accurately judged, and the fact that the well completion pipe string is tripped to the position as deep as possible to play the role of supporting the well wall to the utmost extent is realized; when the well completion pipe string encounters a barrier in advance in the tripping-in process, the assembly structure of the well completion pipe string can be easily adjusted, so that the fact that the suspension point of the well completion pipe string does not shift at a design position is realized, and the problems that well drilling and well repair cannot be operated in the later period when the suspension point shifts upwards are avoided.