The production wellhead device is comprised of three compnents, which including casing head, tubing head and christmas tree.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 PSL4, they can meet AA, BB, CC, DD, EE, FF working condition's requierment.