Differential pressure open sliding sleeve for horizontal well fracturing

The utility model relates to a differential pressure open sliding sleeve for horizontal well fracturing, which comprises an upper joint, an outer cylinder and a lower joint which are connected sequentially in a threaded manner. An inner sliding sleeve and the outer cylinder are fixed by a shear pin, and a split ring is nested in an annular groove on the outer wall at the bottom of the inner sliding sleeve. The differential pressure open sliding sleeve without a ball seat structure needs no special ball throwing operation, and is opened by the aid of the area difference between the upper section and the lower section of the inner sliding sleeve. The differential pressure open sliding sleeve has the advantages of locking in downward shifting, simple structure and convenience in operation, and is mainly used for sectional fracturing technology of a horizontal well in an oil and gas field.