Model “ST140” Screen Sliding Sleeve

Model “ST” screen sliding sleeve is a key tool in the new RFMS first-multi-layer high-speed fracturing system. The sliding sleeve is used with SGG double-layer sieve tube, which can be connected between any two sieve tubes, which can be used as a return fluid channel for circulation filling, but also realize formation isolation during extrusion and filling and selective mining in the later period. The elastic locking mechanism of the switch sleeve in the sliding sleeve can effectively prevent being mistakenly switched by other tools after the sliding sleeve is closed, and the seal of the upper end of the switch sleeve is manufactured by vulcanization process, making the seal more reliable. With the DG-A sliding sleeve closing tool, the one-way closure of the screen sliding sleeve can be realized. The DK-A slide opening tool can open the slide opening.