CONSTRUCTION MACHINE AND METHOD FOR EARTH-WORKING USING SUCH MACHINE Russian patent published in 2018 - IPC E21B7/02 E21B19/08 E02F3/06 E21B44/02 

FIELD: soil or rock drilling; mining.

SUBSTANCE: group of inventions relates to a machine and a method for earth-working by means of a machine, having a mast, along which a top drive can be moved vertically by an adjusting device, through which top drive a telescopic kelly bar is displaceably guided, which has at least one outer kelly bar, which is designed to come to lie on the top drive, and one inner kelly bar, which comprises a rope suspension for a rope, through which the inner kelly bar is moved vertically by a rope winch, wherein earth-working carried out by an earth-moving tool attached to the lower end of the inner kelly bar. Control device automatically controls the adjusting device for the top drive and/or the main rope winch for the kelly bar, wherein the inner kelly bar moves relative to the top drive in some areas in a rapid travel mode at a first speed, and in some areas in a conservative travel mode, in which the speed is reduced with respect to the first speed of the rapid travel mode. Movement in the conservative mode is provided in the transition area, in which the two elements of the kelly bar retract one into the other or move one from the other.

EFFECT: improved efficiency and elimination of the risk of damage to the tool, kelly bar and drill rig as a whole.

12 cl, 2 dwg