Rotary drill automatic control system

Abstract

A system for automatic control of a rotary drill comprises a unit for computing the value of drilling tool penetration per single revolution, said unit connected with its inputs to respective transducers and with its output--to an element for comparison of the current value of drilling tool penetration per single revolution thereof with the preset value of such penetration. The preset value of drilling tool penetration is computed by computer means connected with its inputs to respective transducers and to setters of input parameters. With its outputs, the computer means is connected to the element for comparison of the current value of drilling tool penetration per single revolution thereof with the preset value of such penetration, to regulators of drilling tool axial load and rotation frequency and to an element for comparison of the current value of specific drillability of the rock being drilled with the preset value of specific drillability. The system ensures the possibility of automatic or remote control of the drilling process on the basis of information generated on-line in the course of the drilling operation. The system is capable of operation without re-adjustment, in any field, using a drilling tool of pre-selected type. The system operation ensures the minimum energy consumption and cost of drilling at a high efficiency and drilling tool reliability.