Casing hanger is used for the connection of casing head and surface casing 1)Type WD casing hanger Slip teeth embrace the surface casing tightly driven by external force.It has advantages such as convenient in installation and diamantling,safe and reliable in operation,seal can be triggered by manual operation,etc. Reliable ,safe and convenient in seal. Commonly used on the conditions of heavy bottom tube,or shallow well and low pressure. 2)Type W Casing hanger Seal function can be trigged by gravity of casing string.Reliable,safe and convenient in seal.Adequate for conditions of deep well and high pressure.
