Down -hole drill impels pressure hydraulic control return circuit

The utility model provides a down -hole drill impels pressure hydraulic control return circuit, includes that oil tank, multiple directional control valve, drilling rod propulsion motor, drilling rod gyration motor, flow control valve organize and the feedback variable pump package, it is continuous with the P mouth of pilot operated directional control valve that mouthful pr is far controlled to feedback variable pump package pressure, the F mouth of pilot operated directional control valve links to each other with the push -down a mouth that impels guide's handle, the A mouth of pilot operated directional control valve links to each other with the P1 mouth of balanced valve and high pressure overflow valve, the R mouth of balanced valve passes through oil pipe and links to each other with drilling rod gyration motor corotation oil circuit, the P2 mouth of balanced valve links to each other with the low pressure overflow valve, the utility model discloses a drilling rod axle load matches the rock stratum all