Fluorosilicone rubber composition, preparation method thereof and packer rubber cylinder containing fluorosilicone rubber composition

The invention relates to a fluorinated silicone rubber composition, a preparation method and a packer rubber sleeve. The fluorinated silicone rubber composition is prepared from fluorinated silicone rubber, a processing aid, a cross-linking agent, a reinforcing filler, a high-temperature stabilizer and the like through a mixing process. The packer rubber sleeve is of a four-rubber-sleeve structure and sequentially comprises a spacer ring, a rubber sleeve made of the fluorinated silicone rubber composition, a modified polytetrafluoroethylene rubber sleeve, a protective ring and a shoulder protector from the middle to the two ends, and the protective ring is sleeved with the modified polytetrafluoroethylene rubber sleeve and wrapped by the shoulder protector. The packer rubber sleeve can achieve effective sealing of multi-round steam huff and puff at the temperature of 350 DEG C and the pressure of 21 MPa, the sealing effectiveness of multi-round steam huff and puff of offshore heavy oil thermal recovery is gre