The tubing hanger is located in the tubing head to suspend the tubing string and seal the annular space between the tubing string and the casing. It not only bears the weight of tubing string when hanging tubing string in well, but also ensures the sealing of tubing hanger assembled in tubing head.
The tubing hanger is a device for supporting the tubing string and sealing the annular space between the tubing and the bushing. The sealing mode of tubing hanger is that the tubing hanger and tubing are connected and sealed by the gravity of tubing, which is situated in the big four-way cone of tubing hanger. It is easy to operate, and the wellhead change is fast and safe. Therefore, it is a common way for medium-deep wells and conventional wells.