FIELD: engines and pumps.
SUBSTANCE: claimed invention relates to downhole natural-pressure drill bit drive motors. Drill hole drilling system comprises the natural-pressure motor with the rotor to spin inside the stator, drill bit engaged with said motor to transfer the rotor revolution of said rill bit. The motor rotor includes at least one magnetic field source or magnetic field detector. The stator comprises at least one magnetic field source if the rotor comprises the magnetic field detector and includes at least one magnetic field detector is the rotor incorporates the magnetic field source. The processor can control the claimed downhole natural-pressure motor with the application of measurements generated by means of at least one magnetic field source and at least one magnetic field source.
EFFECT: adequate control over downhole motor.
18 cl, 11 dwg
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