METHOD OF INTERCONNECTING A DRILL ROD WITH A DRILL STRING BY MEANS OF A THREADED CONNECTION, ROD HANDLING SYSTEM AND DRILL RIG

摘要

A method of interconnecting a drill rod (11') with a drill string (11) by means of a threaded connection (112, 111') is disclosed. The method comprises axially aligning the drill rod (11') with the drill string (11), rotating the drill rod (11') in a disengagement rotational direction of the threaded connection (112, 111'), identifying a rotational position of the drill rod (11') where thread ends of the rod and the drill string (11) slip over each other, stopping said rotating within a predetermined period of identifying the rotational position, and rotating the drill rod (11') in an engagement direction, such that the drill rod (11') is interconnected with the drill string (11) by the threaded connection (112, 111').