| 摘要 |
<p>The process makes it possible to install an underground pipe extending between two points (A and B) situated at ground level (1). According to this process, a pilot hole (4) is drilled by means of a tube equipped at its end with drilling means which is pushed into the ground at one of the said points, this pilot hole (4) is then reamed by drawing into it a rotary reamer (5), after which the pipe is drawn into the reamed hole (6). Drilling fluid (9) is injected either at the drilling point (A) or at the point (B) opposite this drilling point, or simultaneously at both points (A) and (B). The invention can be used to improve the implementation of so-called "horizontal" drillings.</p> |
