Multifunctional ball seat with temporary blocking performance for well-completion operation of water injection well

The utility model discloses a multifunctional ball seat with temporary blocking performance for a well-completion operation of a water injection well. The multifunctional ball seat is designed for fulfilling the aims that the well-completion operation of the water injection well meets safe and environment-friendliness requirements, a packer is prevented from being set in advance and the working success rate is improved. The inner wall of the upper part of the multifunctional ball seat is connected with a ball seat baffle plate by a thread; and an axial through hole is formed in the ball seat baffle plate and is blocked by a soluble temporary blocking agent. When in operation, the multifunctional ball seat can go into a well along with a well-completion tubular column, so that safe and environment-friendliness construction can be achieved as the ball seat baffle plate is temporarily blocked and a liquid column is not available in an oil pipe, and the risk of packer setting caused by overhigh speed during well-