Method and device for boring holes in soil or rock
US7195081B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2006 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Apr 3, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/201
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a method and device for boring or drilling, in particular percussion drilling or rotary percussion drilling, holes in soil or rock, wherein a borehole is formed by a percussive and/or rotary movement carried out by a drill bit (2) mounted on a drill rod assembly (3) and a jacket tube (6) coupled with the drill bit (2) is introduced into the borehole, it is provided that the jacket tube (6) is received in a socket (5) provided on the end facing away from the drill bit working surface, of an envelope tube (4) coupled with the drill bit (2), and that the jacket tube (6) is subjected to a percussive and/or compressive stress on its end facing away from the drill bit, whereby directionally precise boring or drilling is rendered feasible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.