Retractable lead sealing oil casing pipe supplementing and connecting device easy to introduce

The utility model provides an easy-to-introduce removable lead seal oil casing pipe connector, which comprises an upper joint and an outer cylinder, the lower part of the upper joint is fixedly butted with the upper end of the outer cylinder, an inner cylinder is also arranged in the outer cylinder, the upper end of the inner cylinder and the lower end of the upper joint are correspondingly provided with matched end part splines for transmitting torque, a slip is arranged in the inner cylinder, and the slip is connected with the lower end of the upper joint. The inner surface of the inner barrel is provided with a locking thread inclined plane matched with the slip, a slip limiting groove used for limiting the slip is formed in the position, located at the lower end of the slip, in the inner barrel, the lower side of the slip limiting groove is provided with a slip control clamp, the lower end of the inner barrel is further provided with a lead sealing ring, and the upper side and the lower side of the lead s