• Aucun déviation: Étant donné que le système concentrique n’utilise pas de composantes eccentrique, il peut forer dans n’importe quel type de sol sans aucune déviation. Le taillant d’entrainement est munie d’une portion à diamètre réduit qui permet de forer un avant trou, sous la couronne, d’environ 3 » (7,5cm). Cet avant trou permet d’éviter toute déviation du tubage.• Un meilleur taux de pénétration: Il y a deux (2) avantages distinct lorsque vous forez avec les systèmes Xs:1 – Concentricité: La couronne de forage est munie de boutons de carbure sur toute sa périphérie. C’est donc dire que tout ces boutons sont en contact avec le sol et ce à tout moment. Par rapport à son design, un système à ailette couvrira environ le tiers (1/3) de cette surface. Donc nous pouvons dire que les boutons de carbure sont soumis à des conditions extrême.2 – Grandeur du marteau: Si vous avez à forer beaucoup de cailloux (boulders) ou bien si votre forage s’effectue dans des portions de roc fracturé, le système Xs est le seul pouvant vous offrir l’avantage d’utiliser un plus gros marteau fond de trou. Le taux de pénétration lors du forage avec la couronne sera comparable au taux de pénétration lorsque vous utilisez un taillant standard de même dimension. • Forage en douceur: Comparativement à l’utilisation de système à ailette, le forage avec le système concentrique vous assure une expérience unique, sans comparaison. Le forage avec un système à ailettes ou eccentrique est très demandant au niveau mécanique; soit des composantes, étant donné le couple élevé requisWorking with an eccentric system is very hard on every piece of equipment due to excessive torque applied by the reamer on the driver device, hammer, drill rods, rotation head and mast. • Wear on gage carbide button: The wear on the carbide buttons on an eccentric system (on the pilot and especially on the reamer part) will occur very fast, especially in abrasive rock or harder ground conditions. On the Xs drill system, there is double the quantity of carbides on the gage row that are actually needed to give extended life. • Components: Eccentric systems consist of a lot of different components, all necessary for its operation. Usually there is a pilot bit, a reamer bit, a driver, steel balls, set screws, pins, spring pins, etc… if you are using a wing type system, a driver device, 2, 3, or 4 wings, pins, screws, spring pins, etc.. All these parts are very costly and this can cause you lot of time on a job site. With the Xs drill system, there is a driver and an assembled crown ready to drill. That’s it ! • Toughness of parts: In eccentric and/or wing bit systems, all components are very fragile, and as soon as you have a little bit of wear in overall system, those parts are inclined to break without notice and leave you again with down time. • Direct Energy Transfer: With the Xs drill system, the energy given by the hammer is transfer directly and entirely to the drilling part of the crown bit, and not to a driving shoe.• Easier to Weld: The crown bit is composed of two (2) assembled swivel parts. The lower rotating part which has carbide buttons to drill, receives the impact and rotation from the hammer. The upper part is welded to the casing, but doesn’t receive any percussion directly from the hammer but is pulled down with the casing through a swivel joint. The impact to the joint is minimized because the drilling action of the rotating crown portion has absorbed most of it, leaving however enough energy to pull down the casing.• Less Maintenance: In almost any other system, there is a lot of maintenance to do on the most expensive part which is the driver device. The driving shoe is fixed to the casing and the driver rotates and impacts on the upper shoe causing rapid wear to appear on the driver which then needs to be rebuilt or replaced. On the Xs drill system, that grinding effect is transferred to the swivel joint between the upper and lower part of the crown, which in 90% of cases is left in the hole.