Therefore a burgiarproof well plugging device is developed,by which the crude oil can be bled off from the well.This new device is mainly comprised of burglarproof cap,guider,stop device and lock.

• 可放压式防盗封井器主要由防盗盖、导向器、限位体、防盗锁等组成,该装置安装在长停井井口套管短节处,起到了防盗和放压回收原油的作用。