| 摘要 |
<p>A method of drilling into an object, the method comprising providing a drill string (1) in a borehole (2) in the object, the borehole having at its bottom a borehole axis (48), the drill string comprising a borehole- centralized jet drill head (16) at its lower end, the jet drill head having a drill axis (20), and comprising a jet nozzle (18); providing a stabilizer means for the drill string, the stabilizer means determining an inclination angle between the borehole axis and the drill axis; and generating a fluid jet (19) at the jet nozzle, so as to blast with an erosive power on an impingement area of the borehole, thereby deepening the borehole, wherein the drill string is rotated while deepening the borehole.</p> |
