Horizontal well sectional profile control pipe column system and sectional plugging assembly thereof

The invention relates to sectional profile control of a horizontal well, in particular to a sectional profile control pipe column system of the horizontal well and a sectional plugging assembly of the sectional profile control pipe column system. The segmented plugging assembly of the horizontal well segmented profile control pipe column system comprises a segmented plugging seat and a segmented plug, wherein the segmented plugging seat is arranged on the side, away from a well mouth, of a profile control agent injection valve, the segmented plug is used for being put into a pipe column to plug the segmented plugging seat, and an axial through hole is formed in the segmented plugging seat; the segmented plug comprises a cylindrical sealing section and a circular truncated cone section located behind the cylindrical sealing section, the diameter of the front end of the circular truncated cone section is smaller than that of the rear end, and the diameter of the cylindrical sealing section is not larger than th