Controllable dissolving method of soluble bridge plug, soluble ball and soluble bridge plug

The invention discloses a controllable dissolving method for a soluble bridge plug. The controllable dissolving method comprises the following steps: selecting a dissolving solution according to a material forming the soluble bridge plug; constructing a soluble sphere according to the dissolving solution and the working environment of the soluble bridge plug; and the soluble ball body is put into the soluble bridge plug to dissolve the soluble bridge plug. The invention further discloses a soluble ball body and a soluble bridge plug, and the soluble ball body comprises an instant plug, a solute and a soluble ball shell. According to the soluble dissolving method provided by the invention, the material and the length of the instant plug are changed to control the dissolving time of the instant plug, that is, the time of changing the local liquid property when the solute in the soluble ball with the solute encounters water is controlled, so that the soluble bridge plug can be controllably and rapidly dissolved;