Drill rod tallying system and method
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United States of America Patent
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Aug 1, 2017
Grant Date -
Jan 7, 2016
app pub date -
Jun 30, 2015
filing date -
Jul 1, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
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.
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