WELLBORE SEGMENTED OPERATION METHOD AND RUBBER PLUG FOR SAID METHOD

Disclosed is a wellbore segmented operation method, comprising the following steps: after a first drilling operation is performed on a borehole, running a pipe column (100), wherein the pipe column (100) successively comprises a floating hoop (2), a rubber plug base (7), a toe end sliding sleeve (3) and a fracturing sliding sleeve (4) in a bottom-up direction; performing a cementing operation, so that cement slurry pumped into an inner cavity of the pipe column (100) enters an annulus between the pipe column and the borehole by means of the rubber plug base (7) and the floating hoop (2) and forms a cement ring, and the cement ring isolates the toe end sliding sleeve (3) and the fracturing sliding sleeve (4) from each other; performing a second drilling operation, so as to ensure that the toe end sliding sleeve (3) of the pipe column (100) is exposed; performing test pressure on the pipe column; and performing a segmented fracturing construction. Further disclosed is a rubber plug (20) suitable for the wellbore segmented operation method.