Efficient hydraulic gas lift positive circulation super-large super-deep hole milling equipment

The invention discloses efficient hydraulic gas lift positive circulation super-large super-deep hole milling equipment. The efficient hydraulic gas lift positive circulation super-large super-deep hole milling equipment comprises a high-pressure water jetting pipe and a hole milling power head arranged at the bottom of the high-pressure water jetting pipe. The hole milling power head comprises ashell, an oil hydraulic motor arranged in the shell and a milling cutter turntable arranged below the shell. The milling cutter turntable is in transmission connection with the oil hydraulic motor, and holes are milled through rotation of the milling cutter turntable. Water outlet holes are formed in the bottom of the shell, the high-pressure water jetting pipe is communicated with the interior ofthe shell and jets water at high pressure through the water outlet holes in the bottom of the shell, and high-pressure air pipes are arranged on the outer side of the high-pressure water jetting pipe. The efficient hydraulic