DRILL ROD TALLYING SYSTEM AND METHOD

摘要

An apparatus and method automatically tally drill string rods for use with a drilling machine. The machine comprises a rack and a rotary drive configured for longitudinal displacement between first and second longitudinal positions. A sensor system is configured to monitor the machine to detect a clamping force applied to rotationally immobilize the drill string and to detect a break-out torque generated by the rotary drive, detect a first longitudinal position of the rotary drive whereat the break-out torque is generated, and detect a second longitudinal position of the rotary drive whereat a make-up torque is generated by the rotary drive. A controller is configured to prevent release of the clamping force until the make-up torque is detected, and automatically enable release of the clamping force after the make-up torque is detected and, concordantly, to update a drill rod tally only when the first and second longitudinal positions are different.

主权项

1. An apparatus for automatic tallying drill rods of a drill string for use with a drilling machine, the machine comprising a rack and a rotary drive configured for longitudinal displacement relative to the rack between a first longitudinal position and a second longitudinal position, the drill rod tallying apparatus comprising:
a sensor system configured to:
monitor the machine to detect a clamping force applied to rotationally immobilize the drill string and to detect a break-out torque generated by the rotary drive;detect a first longitudinal position of the rotary drive whereat the break-out torque is generated; anddetect a second longitudinal position of the rotary drive whereat a make-up torque is generated by the rotary drive; and a controller configured to:
prevent release of the clamping force until the make-up torque is detected; andautomatically enable release of the clamping force after the make-up torque is detected and, concordantly, to update a drill rod tally only when the first longitudinal position is different than the second longitudinal position.