Self-dissolving functional material for making well drilling bridge plug rubber packer and preparation method therefor

The present invention relates to a self-dissolving functional material for making a well drilling bridge plug rubber packer and a preparation method therefor. The self-dissolving polymer functional material is prepared by using the following raw materials in parts by weight: 40-60 parts of rubber, 15-25 parts of a first water-absorbing material, 5-10 parts of a magnesium-containing metal material, 1-10 parts of a degradation agent, 1-10 parts of an organic wrapping material, and 10-20 parts of a second water-absorbing material. The preparation method comprises: completely wrapping the degradation agent by using the organic wrapping materials; and uniformly mixing the other raw materials with a degradation agent covering body that is completely wrapped, to obtain the self-dissolving functional material. The self-dissolving functional material provided by the present invention has higher mechanical strength, so that complete use of the self-dissolving functional material in a short time period can be ensured. According to the present invention, controllability of material self-dissolving time can be realized by adjusting ratios of components in raw materials; and after the material is used, the material can be self-dissolved in an aqueous solution or when heated; the material can be widely applied to exploitation of mineral resources comprising oil, gas and the like; and productivity can be greatly improved because no return operation is needed.