FIELD: mining.
SUBSTANCE: method to calculate instantaneous speed of drilling string assembly bottom rotation at a lower end of the drilling string, with a drive from a drilling mechanism on the upper end of the drilling string exposed to oscillations of sticking-slipping, having the rated or observed main frequency, besides, the method contains stages of detecting changes in a torque on a shaft of the drilling mechanism, combining the available torsion pliability of the drilling string with changes of the torque at the shaft and generation of an output signal, which represents instantaneous speed of rotation.
EFFECT: tuning of proportional-integral or proportional-integral-differential controller for damping of twisting waves energy at sticking-slipping frequency or near it.
15 cl, 15 dwg
