Two-way opening pressure differential sliding sleeve
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The utility model relates to a two-way opening pressure differential sliding sleeve, which belongs to the technical field of downhole tool manufacturing of fracturing and acidizing construction in a gas-oil well, and comprises a central tube and a liquid cylinder structure, wherein the upper end of the central tube is connected with a connecting hoop, and the lower end thereof is connected with a lower joint; and an upper liquid cylinder and a lower liquid cylinder of the liquid cylinder structure are respectively sleeved on the central tube, and a through groove is arranged on the central tube. The utility model adopts the design that a set of mechanisms can be opened in a two-way way, and provides the two-way opening pressure differential sliding sleeve, which is suitable for horizontal well sections, can solve the problem that a ball injection sliding sleeve can not be used for a first section of a staged fracturing and acidizing tool pipe string in a horizontal open hole, and has the characteristics of utilizing the pressure differential to push the upper liquid cylinder and the lower liquid cylinder to move up and down to open a channel.