Method and device for the drilling of holes in ground or...

Details Method and device for the drilling of holes in ground or... Method and device for the drilling of holes in ground or...

2007-08-14

2007-08-14

Dang, Hoang (Department: 3672)

Boring or penetrating the earth

Boring without earth removal

Drive point detached from shaft to form cased bore or with...

C175S170000, C175S320000, C175S415000

Reexamination Certificate

active

11400311

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).

REFERENCES:
patent: 975487 (1910-11-01), Welsh
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patent: 5205366 (1993-04-01), Klemm
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patent: 2155540 (1973-05-01), None
patent: WO00/57019 (2000-09-01), None
patent: WO03/001022 (2003-01-01), None
patent: WO03/004824 (2003-01-01), None

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