Multifunction long-halt casing short-section

The utility model discloses a multifunction sleeve pipe short section for inactive wells. The utility model is composed of a sleeve pipe heat, a valve seat, a flow drainage pipe and a lower joint, wherein, the interior of the sleeve pipe head is provided with a support frame, and the flow drainage pipe forms an E shape. The lower part of the flow drainage pipe is provided with a hole. The lower end of the valve seat is connected with the support frame by screw threads, and the upper end of the valve seat is connected with the flow drainage pipe by screw threads. The lower joint is connected with the bottom of the valve seat by screw threads. The interior of the lower joint is provided with a valve core which is composed of a centralizing rod, a sealing ball and a spring. The utility model satisfies the requirement of extraction data of the inactive wells, realizes the multiple functions of theft prevention, pressure measurement, pressure discharge, liquid level measurement, no influence on pumping, etc. for the inactive wells, and solves the management problem of the inactive wells.