Sliding sleeve device and fracturing string comprising same

The invention provides a sliding sleeve device and a fracturing pipe column comprising the same. The sliding sleeve device comprises an outer cylinder, wherein a circulating hole capable of communicating the inside and the outside is formed in the wall of the outer cylinder; and an inner barrel which is selectively arranged in the inner cavity of the outer barrel, wherein in the initial state, the inner barrel and the outer barrel are fixed to close the circulating hole, and in the first state, the inner barrel can move relative to the outer barrel to release closing of the circulating hole, and in the initial state, the circulating hole is filled with lubricating grease, and the circulating hole is filled with lubricating grease; and when the inner barrel moves relative to the outer barrel, the lubricating grease enters the space between the inner barrel and the outer barrel to play a lubricating role, so that the inner barrel and the outer barrel can relatively move more smoothly, and smooth opening of the