Method for correcting positioning errors in rock drilling,...

E - Fixed Constructions – 21 – B

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E21B 15/00 (2006.01) E21B 15/04 (2006.01) E21B 44/00 (2006.01) E21B 44/02 (2006.01) G05B 19/404 (2006.01)

Patent

CA 2354567

The invention relates to a method for correcting positioning errors in rock drilling, and a rock drilling equipment. Deviation of the boom (4) position from the theoretical position is measured as a function of the position of at least one boom joint (2, 3), the measured deviations are stored in the memory of the drilling rig, and when the boom (4) is positioned to the drilling position, its position is corrected on the basis of the stored deviation. The drilling equipment includes a memory for storing the deviations between the true position of the boom (4) and the theoretical position calculated on the basis of the joint sensor (2, 3) values, and a calculating device for correcting the boom (4) position on the basis of the deviations stored in the said memory.

L'invention concerne un procédé de correction d'erreurs de positionnement dans le forage de roches, ainsi qu'un matériel de forage, ce procédé consistant à mesurer la déviation de la position de la flèche (4), à partir d'une position théorique, en fonction de la position d'au moins une articulation de la flèche, à conserver les déviations mesurées dans la mémoire du matériel de forage, et à corriger la position de la flèche (4), en fonction des mesures de déviation conservées, lorsque l'on met la flèche en position de forage. Le matériel de forage comprend une mémoire de stockage des déviations, entre la position réelle de la flèche (4) et la position théorique, calculées d'après les valeurs produites par des capteurs situés au niveau des articulations (2, 3), ainsi qu'un dispositif de calcul servant à corriger la position de la flèche (4) en fonction des mesures de déviations conservées dans ladite mémoire.

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