Global Patent Index - EP 3436664 B1

EP 3436664 B1 20200212 - METHOD AND SYSTEM FOR BORING A SHAFT

Title (en)

METHOD AND SYSTEM FOR BORING A SHAFT

Title (de)

BOHRVERFAHREN UND SCHACHTBOHRSYSTEM

Title (fr)

UNE MÉTHODE ET UN SYSTÈME DE FORAGE DE PUITS

Publication

EP 3436664 B1 20200212 (DE)

Application

EP 17718486 A 20170330

Priority

  • DE 102016106020 A 20160401
  • DE 102016011332 A 20160921
  • EP 2017057502 W 20170330

Abstract (en)

[origin: WO2017167856A1] The invention relates to a boring method in which overburden in a shaft end of a drilled shaft (10) is created by a drill unit (90). The overburden is transferred by means of liquid into a container (30, 40) provided within the drilled shaft (10). A mixture of overburden and liquid is thus located in the container (30, 40). The container (30, 40) is flooded by further transfer of overburden by means of liquid, wherein at least excess liquid overflows. A residual mixture remains in the container (30, 40). The liquid that has overflowed is returned to the shaft end. The residual mixture is transported away through the drilled shaft (10). By way of this special separation method, free spaces are created in the region of the drill unit (90), which, even in the case of relatively small shaft diameters, for the first time allows effective, safe and commercially advantageous drilling operation in full shaft drilling mode. The invention also relates to a shaft drilling system which is suitable for carrying out the drilling method.

IPC 8 full level

E21D 1/06 (2006.01); E21B 21/00 (2006.01)

CPC (source: EP)

E21B 21/00 (2013.01); E21D 1/06 (2013.01)

Citation (examination)

None

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2017167856 A1 20171005; AU 2017242643 A1 20181018; AU 2017242643 B2 20200123; CN 109072696 A 20181221; CN 109072696 B 20200925; EP 3436664 A1 20190206; EP 3436664 B1 20200212; ZA 201805981 B 20190626

DOCDB simple family (application)

EP 2017057502 W 20170330; AU 2017242643 A 20170330; CN 201780021431 A 20170330; EP 17718486 A 20170330; ZA 201805981 A 20180906