Lengthened seating joint

The utility model provides a lengthened seating joint which is characterized in that a lengthened extension cylinder is integrally arranged at the tail end of a joint body, the lengthened extension cylinder is used for arranging a cable shield and fixing and protecting a cable, a female buckle is formed on the inner wall of the head end of the joint body, a seating step is formed on the inner wall of the lower part of the joint body, and the seating step is used for putting a blanking plug. And a male buckle is formed on the outer wall of the tail end of the lengthened extension cylinder. The lengthened seating pup joint is reliable in principle and convenient to use, the lengthened extension cylinder is designed on the penetrating seating pup joint, a cable shield is convenient to mount, the lengthened seating pup joint is used for fixing and protecting a cable, and the technical problem of friction damage caused by the fact that the cable is not fixed in the tripping-in process of a production pipe column c