Multistage fracturing tubular column of oilfield horizontal well

A multistage fracturing tubular column of an oilfield horizontal well is characterized in that releasing packers (1), fracturing sliding sleeves (2), disjointed packers (3) and constant-pressure ball seats (4) are sequentially connected through an oil pipe. The multistage fracturing tubular column is applied to staged fracturing of the horizontal well, an oil-extraction sleeve column can serve as a working tubular column, and step-by-step throwing open type fracturing sliding sleeves (2) are adopted, so that operating processes are simplified, liquid-flow friction in the well is reduced, and multistage fracturing by one-time construction can be realized.