The Production Wellhead Device is comprised of three components, which including Casing Head, Tubing Head and ChristmasTree. They are mainly used for production well to control pressure and adjust flow rate of oil (gas) well. They are also available for controlling Wellhead during acid fracturing, water injection and well performance test. During of PSL1 to PSL3, they can meet AA, BB, CC, DD, EE working condition's requirement.

The bearing part of the device is made of low alloy steel through heating treatment with high bearing capability and high reliability and safety. According to various working condition, the material of sealing elements include Propyl Cyanide, Hydrofluoric, Teflon, Tetrafluoride, Austenitic Stainless Steel with high corrosion resistance and perfect sealing property.