US 12,078,049 B2
Arrangement of controlling drilling parameters during extraction of a drill string
Gustav Mörtzell, Örebro (SE); and Magnus Olsson, Hallsberg (SE)
Assigned to EPIROC ROCK DRILLS AKTIEBOLAG, Örebro (SE)
Appl. No. 18/253,098
Filed by EPIROC ROCK DRILLS AKTIEBOLAG, Örebro (SE)
PCT Filed Nov. 1, 2021, PCT No. PCT/SE2021/051089
§ 371(c)(1), (2) Date May 16, 2023,
PCT Pub. No. WO2022/115016, PCT Pub. Date Jun. 2, 2022.
Claims priority of application No. 2051380-0 (SE), filed on Nov. 27, 2020.
Prior Publication US 2024/0011387 A1, Jan. 11, 2024
Int. Cl. E21B 44/02 (2006.01); E21B 7/02 (2006.01); E21B 44/04 (2006.01); E21B 44/06 (2006.01)
CPC E21B 44/02 (2013.01) [E21B 7/025 (2013.01); E21B 44/04 (2013.01); E21B 44/06 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An arrangement for controlling a rock drilling machine during an extraction of a drill string from a drilled bore, the rock drilling machine being movably arranged on a feeder, the arrangement comprising:
an actuator arranged to move the rock drilling machine in a direction opposed to a drilling direction along the feeder,
a rotation motor arranged to rotate the drill string, and
an actuator controller arranged to control the actuator during the extraction of the drill string from a drilled bore, the actuator controller being arranged to control the actuator according to a first and a second mode in dependence of at least one operational parameter from a set of parameters including: a representation of a torque generated by the rotation motor to rotate the drill string, a representation of a rotation speed of the drill string provided by the rotation motor, a representation of a force provided by the actuator to move the rock drilling machine in the direction opposed to the drilling direction, and a representation of a moving speed of the rock drilling machine provided by the actuator,
wherein the actuator controller, in the first mode, is arranged to control a moving speed at which the actuator moves the rock drilling machine in the direction opposed to the drilling direction, and wherein the actuator controller, in the second mode, is arranged to control a force provided by the actuator to move the rock drilling machine in the direction opposed to the drilling direction.