What Is The Function Of The Tubing Head?

The tubing head is installed on the casing head, and its function is to suspend the tubing in the well and seal the annular space between the tubing and the reservoir casing. At present, the top-screw valve suspension method is mostly used, that is, a top-screw valve is installed on the casing cross, and there is a tapered channel with a large upper part and a smaller lower part in the top-screw valve. The tubing hanger is also a tapered piece with a sealing ring on it. Under the tension of the full wellbore tubing weight, the tubing hanger is firmly seated in the seat of the top wire valve. The function of the jacking wire is to prevent the tubing string from being pushed out when the internal pressure is too high.