Water control well completion pipe string with tripping-in variable-density screen pipe and continuous packer

The invention discloses a water control well completion pipe string with a tripping-in variable density screen pipe and a continuous packer, and the water control well completion pipe string comprises the variable density screen pipe, a quick connector, a positioning extension cylinder, a filling sliding sleeve, a top packer, a mechanical positioner, hydrophobic gravel, a hand releasing tool and a setting tool. At present, the method is only widely applied to an oil field, water control is not achieved in a gas field, hydrophobic gravels and a variable-density screen pipe are combined and tripped into a horizontal section, and compared with the method that only a continuous packer is adopted for controlling water, the variable-density screen pipe is applied to a whole section of a shaft, and the hydrophobic gravels are filled outside the variable-density screen pipe, water control is achieved. The variable-density screen pipe has the advantages that the number of apertures of the variable-density screen pipe