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Patent Searching and Data


Title:
METHOD FOR SINKING A BOREHOLE
Document Type and Number:
WIPO Patent Application WO/2015/140344
Kind Code:
A3
Abstract:
The invention relates to a method for sinking a borehole (2) in mountains, wherein the rock present at the base of the borehole is thermally melted and is removed upward from the borehole (2) by means of a gaseous conveying medium, wherein the heat required to melt the rock is provided by at least one electrical plasma generator (8), which is associated with a tunneling head (4), which is located on the front of an advancing and supplying pipe that can be inserted into the borehole (2). According to the invention, in order to avoid the overheating of metal components of the device in such a method, the gaseous conveying medium is conducted to the tunneling head (4) via the advancing and supplying pipe (3) at least completely or partially in liquid form and is divided into two partial flows there, of which the one partial flow is used for cooling and for operating the plasma generator (8) and the other partial flow is used as a rising conveying medium after evaporation, wherein the liquefied-gas amounts in both partial flows are controlled in such a way that the temperature of the tunneling head (4) and of the components of the tunneling head (4) and the temperature of the advancing and supplying pipe (3) are held in a predefined temperature range.

Inventors:
GROTENDORST JOSEF (DE)
Application Number:
PCT/EP2015/056092
Publication Date:
December 17, 2015
Filing Date:
March 23, 2015
Export Citation:
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Assignee:
GROTENDORST JOSEF (DE)
International Classes:
E21B7/14; B23K10/00
Domestic Patent References:
WO2013135391A22013-09-19
WO2012142738A12012-10-26
Foreign References:
CN2188647Y1995-02-01
US3467206A1969-09-16
Attorney, Agent or Firm:
BEHRENDT, Arne et al. (Huestr. 23, Bochum, DE)
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