In case well head pressure goes up, drilling fluid can be pumped down hole by kill manifold to balance bottom-hole pressure so as to prevent well kick or blowout; or with the blowout pipelines connected to it, it can drain fluids from the well directly to release bottom-hole pressure; Cement can also be injected into the well through kill manifold during the cementing operation, and water or extinguishing agent can be injected when necessary. Check valves ensure that fluids flow one-way down hole, but no backflow occurs. The kill manifold consists of check valves, gate valves, pressure gauges and pipe lines. One end of it is connected to the drilling spool, and the other to the injection pump. Both choke manifold and kill manifold are made in conformity with API 16C standard. Xiongyue kill manifold has 5 classes of working pressure: 14MPa, 21MPa, 35MPa, 70MPa, 105MPa. Rated pressure of all the pipe lines, gate valves and check valves must match that of the BOP. Kill manifold is not supposed to be used for regular drilling fluids injection.