Hydraulic sliding sleeve

The invention provides a hydraulic sliding sleeve which comprises a measuring and controlling system, a driving system, a power supplying system and hydraulic channels or hydraulic cavities. The measuring and controlling system is used for detecting pressure variation of hydraulic pressure in each hydraulic channel or each hydraulic cavity and then transmitting instructions to the driving system according to detection results, so that the hydraulic sliding sleeve can be opened or closed; and the power supplying system provides electric energy for the measuring and controlling system and the driving system. The hydraulic sliding sleeve in an embodiment of the invention has the advantages that when hydraulic sliding sleeves are applied to a completion string of a horizontal well, the hydraulic pressures (used as control signals) with the pressure variation are generated by a ground hydraulic control device and are transmitted to the hydraulic sliding sleeves in various fracturing construction units of a horizontal section, the hydraulic sliding sleeves only can be opened or closed after receiving the respective pressure signals, accordingly, step-by-step ball feeding is omitted, and unlimited staged fracturing can be implemented for the horizontal section; and later staged production can be implemented, and the hydraulic sliding sleeve is quite suitable for marine staged fracturing.