Method and device for the drilling of holes in ground or rocky material
US7255181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2006 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Apr 10, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/20
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a method and device for drilling, in particular percussion drilling or rotary percussion drilling, holes in soil or rock material, wherein a borehole is formed by a percussive and/or rotational movement carried out by a drill bit (1) mounted on a drill rod assembly (4) and an envelope tube and/or a jacket tube (15, 18) is introduced into the borehole, it is provided that the impact energy introduced by the drill rod assembly (4) is transmitted partially, particularly centrally, by the drill rod assembly (4) onto the drill bit (1) and partially via an impact shoe (10) cooperating with the drill rod assembly (4) onto the envelope and/or jacket tubes (15, 18), thus enabling the reliable introduction of the excavation or impact energy into the drill bit (1) as well as into the envelope and/or jacket tubes (15, 18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.