CONTROL OVER FEED OF ROLLING CUTTER MACHINE FOR DRILLING OF BLAST WELLS AND DEVICE TO THIS END Russian patent published in 2015 - IPC E21B44/04 E21B19/84 

FIELD: process engineering.

SUBSTANCE: set of inventions relates to mining, particularly, to rolling cutter machines for drilling blast wells. This process uses tackle systems with friction winches driven by induction motors and drives rpm controllers. It consists in application of frequency inverter for control over each induction motor. Frequency variation is used to set rectilinear working characteristic torque-rpm of every motor. Drive rpm controller is used to time the rpm of each motor. Torque is measured at one of said motors to correct the load at the other motor by measured torque.

EFFECT: compensation for non-synchronous rpm of winch drives, difference in diameters of winch drums and cables, cable slippage and friction forces, ruled out skew of the carriage.

2 cl, 4 dwg