EP 2407630 A2 20120118 - Pipe umbrella drilling method
Title (en)
Pipe umbrella drilling method
Title (de)
Leitungsschirm-Bohrverfahren
Title (fr)
Procédé de forage par parapluie de tuyaux
Publication
Application
Priority
DE 102010027544 A 20100716
Abstract (en)
The invention provides a drilling device suitable for production of a support pipe-lined drill hole for the pipe umbrella technique wherein the device comprises: a body (4); a pilot drill bit (2) for drilling a pilot hole (35a); one or more drill elements (3) for radially enlarging the pilot hole by drilling to apply a rock loosening force (FG, 27) having a radial component (FGR) and an axial component (FGA) wherein the one or more drill elements are mounted on the body so that the one or more drill elements may be extended or retracted from the body and wherein the one or more drill elements are arranged so that the radial component (FGR) of the rock loosening force is such that the one or more drill elements are prevented from retraction during the drilling; wherein the device operates consistently independent of the rock conditions and ensures the production of bores 35 that are always of the same cross section.
IPC 8 full level
E21B 7/20 (2006.01); E21B 10/32 (2006.01); E21B 10/66 (2006.01); E21D 9/04 (2006.01)
CPC (source: EP US)
E21B 7/20 (2013.01 - EP); E21B 10/325 (2013.01 - EP US); E21B 10/66 (2013.01 - EP); E21D 9/04 (2013.01 - EP)
Citation (applicant)
- EP 0511298 A1 19921104 - UNIROC AB [SE]
- EP 0563561 A1 19931006 - BOART HWF GMBH CO KG [DE]
- DE 2238598 A1 19740214 - BETON & MONIERBAU AG
- DE 102005046495 A1 20070405 - SRT ROCK TOOLS HANDELS U PRODU [AT]
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 2407630 A2 20120118; EP 2407630 A3 20150624; DE 102010027544 A1 20120119; TW 201219641 A 20120516; TW I632287 B 20180811
DOCDB simple family (application)
EP 11173888 A 20110713; DE 102010027544 A 20100716; TW 100125198 A 20110715