Directional joint for well repairing and bushing removing in oil field

The invention relates to a directional joint for well repairing and bushing removing in an oil field. The directional joint is mainly used for solving the problem that the compatibility between a casing mill tubular column and a borehole is poor and the compatibility between the casing mill tubular column and a casing pipe is poor. The directional joint is characterized in that a ball-shaped hole is formed in the lower end of an upper joint body (1), the upper end of an inner sleeve (3) is provided with a ball head and an inner through hole of the inner sleeve (3) is a tapered hole, the ball head of the inner sleeve (3) is arranged in the ball-shaped hole of the upper joint body (1) and the upper end of a cylindrical body (2) is connected outside the upper joint body (1) through threads. The lower end of the cylindrical body (2) is connected outside the inner sleeve (3) through a spline, the upper end of a lower joint body (4) is connected at the lower end of the inner sleeve (3) through threads, a sealing ri