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Patent Searching and Data


Title:
DEVICE AND METHOD FOR DRILLING TWO GALLERIES IN OPPOSITE DIRECTIONS
Document Type and Number:
WIPO Patent Application WO/2014/006204
Kind Code:
A3
Abstract:
The subject matter of the invention is a device for drilling two galleries facing each other and extending on either side of a pipe (5), which comprises a thrust assembly (10) provided with two mobile thrust plates (11 a, 11 b) for axial thrust from a first and a second side of the thrust assembly, a support frame (15) for the thrust assembly and sliding tubes, two drilling heads (12a, 12b) and sliding support tubes (13a, 13b) positioned between the mobile thrust plates (11 a, 11 b) of the thrust assembly and the drilling heads (12a, 12b). The invention further concerns a method for drilling galleries from a pipe using a micro tunnel-boring machine which comprises a step of simultaneously digging two galleries along the same axis and in opposite directions while balancing the thrust forces of the micro tunnel-boring machine on each side so as to limit the stresses on the pipe to the difference between the thrust forces on each side.

Inventors:
JOUANICOT FABIEN (FR)
Application Number:
PCT/EP2013/064304
Publication Date:
June 05, 2014
Filing Date:
July 05, 2013
Export Citation:
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Assignee:
ASTRIUM SAS (FR)
International Classes:
E21D9/00; E21B7/04
Foreign References:
JP2004052392A2004-02-19
US20110018332A12011-01-27
US5118220A1992-06-02
Attorney, Agent or Firm:
MAUPILIER, Didier (111 Cours du MedocCS 40009, Bordeaux cedex, FR)
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