METHOD OF DIRECTED DRILLING WITH CORRECTION OF WELL TRAJECTORY Russian patent published in 2020 - IPC E21B44/04 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to methods of adjusting operating parameters of drilling process and can be used in oil and gas industry when drilling inclined oil and gas wells. Method of directed drilling includes control of a well trajectory by supply to the drilling tool of axial load and torques by means of the upper power drive. At the same time the deflector of the downhole motor is first installed in the well in the preset position by single supply to the drilling tool of the corresponding torque or by repeated successive supply to the drilling tool of corresponding torsion torques different in value and varying in direction. Then the rock is destructed in the specified direction by supply of torque to the bit, which ensure the bit rotation around the well axis or tangent to it. At that, the bit rotation speed around the well axis or tangent to it is set such that the rock destruction in the specified direction was performed during the time interval corresponding to the bit revolution about the well axis or tangent to it, which is longer than the rock destruction time interval, corresponding to other half of drill bit revolution around well axis or tangent to it.

EFFECT: improving reliability and efficiency of drilling of inclined sections of the well, increasing service life of the drilling tool, increasing the rate of penetration and providing a smoother transition to the inclined section of the well, maintaining the diameter of the drilled well at transition to the inclined section, enlarging consumer functions.

1 cl, 1 dwg