Blanking plug

The utility model discloses a blanking plug which comprises a shell, a sliding sleeve, elastic pieces, a first eyelet and a second eyelet. The shell is provided with an inner cavity. The sliding sleeve can be slidably contained in the shell, the outer wall of the sliding sleeve can be matched with the inner wall of the shell in a sealed mode, a channel penetrating in the axis direction of the shell is arranged on the sliding sleeve, and a ball body used for blocking the channel is arranged in the channel opening formed upward in the sliding sleeve. The lower end of the sliding sleeve is provided with the elastic pieces, one ends of the elastic pieces abut against the sliding sleeve, and the other ends of the elastic pieces are fixed on the inner wall of the shell. The first eyelet and the second eyelet are formed in the wall surface of the shell, and the sliding sleeve controls the connection and disconnection between the second eyelet and the first eyelet in the process of sliding relative to the shell. The blanking plug is used in a Y-shaped electric submersible pump oil extraction production pipe column, not only can oil well flowing requirements be met, but also a blanking plug function can be acted on an oil pipe under the working condition of an electric submersible pump, meanwhile the electric submersible pump pipe column can be used to perform acidizing operation, and secondary harm to a reservoir stratum and corrosion on a casing pipe by acid liquor can be reduced.