... 3.Apply to all kinds of casing Multi-block wellheadPressure2000PSI~20000PSIMediumOil, gas, mud, containing H2S, ... drilling process, without changing the blowout preventer.• mandrel type casing hanger design cycle trough mud.• equipped with ... the casing stuck in the decentralization process, mandrel type hanger hanging is not in place and so ... Performance Level: PR1 ~ 2 API 6A Multi-Block Wellhead