Device and method for testing damage condition of outer surface of packer rubber sleeve

The invention discloses a device and a method for testing the damage condition of the outer surface of a packer rubber sleeve, and belongs to the field of well completion testing. The testing device comprises a testing sleeve, an upper tubing nipple, a lower tubing nipple, a testing packer, an upper end cover, a lower end cover and a pressure gauge. The upper end and the lower end of the test sleeve are connected with the upper end cover and the lower end cover; a pipe passing hole is formed in the top of the upper end cover, and a fluid passing hole is formed in the side part; the lower end cover is closed; the upper oil pipe nipple, the test packer and the lower oil pipe nipple are sequentially connected from top to bottom, and the upper oil pipe nipple is further connected with the upper end cover through a pipe passing hole; part of the upper tubing nipple, the test packer and the lower tubing nipple are located in the test sleeve, and a gap is formed between the bottom of the lower tubing nipple and the