Device for drilling and draining holes in soil or rock

Inactive Publication Date: 2001-06-21
ALWAG TUNNELAUSBAU GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when doing so, it is to be anticipated that selective dewatering or draining is impossible not least for the reason that the at least one passage opening provided in the region immediately following upon the drill bit serves to remove the worked material and, therefore, must have an accordingly large cross section naturally unable to provide for t

Method used

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  • Device for drilling and draining holes in soil or rock
  • Device for drilling and draining holes in soil or rock

Examples

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Embodiment Construction

[0030] In FIG. 1, a device for drilling, in particular impact drilling or rotary percussion drilling, and draining holes in soil or rock material is generally denoted by 1, wherein a drill bit, which is divided into a central drill bit 2 and an annular drill bit 3, for instance, in the radial direction, in a known manner is actuated for impact drilling or rotary percussion drilling via a drill rod assembly schematically indicated by 4. The drill bit, in addition, cooperates with an impact shoe 5 wherein the drill rod assembly 4 is surrounded by a jacket tube 6 composed of several individual parts, as will be apparent even more clearly from FIGS. 2 and 3.

[0031] In the region immediately following upon the drill bit 2, 3 and the impact shoe 5, respectively, a filtering tube 7 surrounding the jacket tube 6 and composed of a plurality of individual parts in the shown representation is provided, which comprises a plurality of passage openings or passage slits 8 distributed about its peri...

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PUM

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Abstract

The invention relates to a device (1) for the drilling, notably by percussion or rotary-percussion drilling, and draining of holes in soil or rock. A drill bit (2, 3) mounted on a drill rod (4) creates a bore hole and a jacket tube (6) is coupled to the drill rod (4) or the drill bit (2, 3). In the area adjacent to the drill bit (2, 3) the jacket tube (6) has at least one through hole which opens into an annular space embodied between the drill rod and the jacket tube. In the end area adjacent to the drill bit (2, 3) the jacket tube (6) is surrounded by at least one filter tube (7) having a plurality of through holes or slits (8) which are distributed especially evenly across its circumference. This allows for correspondingly safe and reliable drainage during boring, using simple measures.

Description

[0001] The present application is a continuation application of PCT / AT99 / 00207, filed Aug. 20, 1999.[0002] 1. Field of the Invention[0003] The present invention relates to a device for drilling, in particular impact drilling or rotary percussion drilling, and draining holes in soil or rock material, wherein a drill bit mounted on a drill rod assembly forms a drill hole and a jacket tube is coupled with the drill rod assembly or the drill bit, wherein the jacket tube in the region following upon the drill bit is formed with at least one passage opening that opens into an annular space formed between the drill rod assembly and the jacket tube.[0004] 2. Description of the Prior Art[0005] A device of this type can be taken, for instance, from WO 98 / 21439, wherein a process and a device for simultaneously drilling and lining holes is disclosed. By means of a jacket tube surrounded by a drill rod assembly actuating a drill bit, an annular space is made available between the jacket tube an...

Claims

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Application Information

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IPC IPC(8): E02D3/10E21B7/20E21B43/08E21B43/10
CPCE02D3/10E21B7/20E21B43/10
Inventor MOCIVNIK, JOSEFBOHM, KARL
Owner ALWAG TUNNELAUSBAU GMBH
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