FIELD: mining.
SUBSTANCE: group of inventions relates to means of controlling pressure and flow during drilling operations. Disclosed is a method for pressure control in a well, comprising wells which receive parameters and pass appropriate information in a hydraulic model, which determines desired predetermined pressure in annular space. Required pressure value is transmitted from hydraulic model to data collection and management interface, and trained predictive controller device for use in predicting future values given pressure in annular space. Trained predictor is trained in real time and can predict current values of measurement results of one or more sensors based on output signals. If sensor output signal becomes unavailable, predictive device may be transmitted to device verification data missing values relating to results of measurement of sensor, at least for some time until output signal of sensor again becomes available. Method further comprises transmitting a command to change flow through annular space formed radially between drill string and well bore, and adjusting predetermined pressure value in response to transmission. Also disclosed is a system for realising said method.
EFFECT: high accuracy of downhole pressure control.
21 cl, 11 dwg
