Abstract: A dissolvable, variable-diameter metal sealing and fracturing bridge plug includes a conical body internally provided with an axial hollow passage; a central connection shaft inserted into the hollow passage of the conical body; a slip movably installed on an external conical surface of the conical body; a tail base internally provided with two adjacent internal thread sections orderly reduced in diameter; a variable-diameter sealing ring made from a dissolvable metal and installed on a side of the slip that is close to the bottom of the conical body; and a variable-diameter supporting ring made from a dissolvable metal and installed between the variable-diameter sealing ring and the slip.

Abstract: A dissolvable, variable-diameter metal sealing and fracturing bridge plug includes a conical body internally provided with an axial hollow passage; a central connection shaft inserted into the hollow passage of the conical body; a slip movably installed on an external conical surface of the conical body; a tail base internally provided with two adjacent internal thread sections orderly reduced in diameter; a variable-diameter sealing ring made from a dissolvable metal and installed on a side of the slip that is close to the bottom of the conical body; and a variable-diameter supporting ring made from a dissolvable metal and installed between the variable-diameter sealing ring and the slip.