METHOD OF ROTARY DRILLING OF WELLS WITH MODULAR CONTROLLED SYSTEM OF SMALL DIAMETER Russian patent published in 2019 - IPC E21B7/06 E21B47/22 E21B47/26 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to directed drilling of oil and gas wells. Method of rotary drilling of wells with modular controlled system of small diameter includes drilling of well or sidetrack with inclined spatially oriented profile in productive formation using modular system of rotary drilling, including telemetry module and logging module. Preliminary investigation of rock occurrence conditions is carried out by means of seismic investigations. Drilling process simultaneously controls position of well trajectory and performs geophysical survey in well. According to the geophysical survey data, the bedding layer in real time is determined. According to telemetry data zenith angle of well drilling is determined. Then, angle of bed penetration is calculated from values of bedding angle and zenith angle, calculated angle of opening is compared with design angle of formation opening, obtained during preliminary investigations of rock occurrence conditions. In case of its deviation from design, zenith angle of well drilling is corrected taking into account rock bedding angle depending on geological structure of rock massif.

EFFECT: technical result is higher accuracy of drilling of directional wells.

1 cl, 1 dwg