Gas-liquid universal control manifold for cavity type continuous circular drilling

The utility model discloses a gas-liquid universal control manifold for cavity type continuous circular drilling. One end of a main channel pipeline is connected to a top drive, and the other end of the main channel pipeline is connected to an opening for circulatory medium of the drilling through a stand pipe main valve. One end of a lower bypass pipeline is connected to a lower sealing cavity, and the other end of the bypass pipeline is connected to the opening for circulatory medium of the drilling through a bypass main valve. A filling pipeline is connected to the main channel pipeline through a check valve and a stand pipe assistant valve. One end of an upper bypass pipeline is connected to an upper sealing cavity, the other end of the upper bypass pipeline is connected to a pipeline between the check valve and the stand pipe assistant valve, and the connecting point is further connected to the lower bypass pipeline through a bypass assistant valve. A pressure release valve is installed between the connecting point and the bypass assistant valve. Pressure test devices are arranged on the main channel pipeline and the bypass pipeline respectively. The gas-liquid universal control manifold for the cavity type continuous circular drilling is suitable for drilling circulatory mediums like drilling fluid, gas and inflated air.