The R-F reclosable Frac Sleeve is designed for horizontal well environment by Sunrise Company. This multifunctional Frac Sleeve can improve the completion efficiency by operation of dropping ball from the ground. The Frac Sleeve is initially closed, the opening method is to drop a ball into the pipe string, when the ball reaches on the surface of the ball seat, the Frac Sleeve can be opened by applying pressure, the piston slips and then a channel is formed between reservoir and the inner cavity of the Frac Sleeve The ball seat is made of drillable materials, a whole wellbore passage can be provided after drilling out, and on-off tools can be run into to open or close the Frac Sleeve.

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