The casing head is a fundamental part of the wellhead assembly, installed at the lower end of the wellheadassembly and connected to the surface casing. it provides essential equipment assurance for subsequentdriling operations. The casing head consists of a four-way cross, valves, casing hangers, top thread assemblyetc, The hanger seats within the four-way cross of casing head, suspending the casing string and sealing theannular space between the casing string and the casing. The product comes in single, double, and triple stagesavailable in both modular and integral designs. The hanger sealing can be either rubber or metal.