EP 0131771 B1 19870401 - DRILLING DEVICE, ESPECIALLY FOR UNDERGROUND MINING
Title (en)
DRILLING DEVICE, ESPECIALLY FOR UNDERGROUND MINING
Publication
Application
Priority
DE 3322427 A 19830622
Abstract (en)
[origin: US4625815A] The invention relates to a drilling equipment whose annular bit (4) for cutting the rock located in the deepest point of the drill hole is provided with high-pressure water-jet nozzles and is connected via a flexible high-pressure hose pipe (13) with a high-pressure pump. In order to be able to drill with the aid of such a drilling equipment small-diameter drill holes of high directional stability, the invention proposes that the high-pressure hose pipe (13) be constructed to be rigid under torsion, non-rotatably connected to the annular bit (4) and the turning drive (24, 25) of the drilling machine (8) and to be journaled in a non-rotatable jacket tube (15) elastically deflectable from the extension position, said jacket tube being rigid in radial direction and guided in the area of the drill hole mouth in a deflecting device (7) and displaceable together with the high-pressure hose pipe (13) in its longitudinal direction.
IPC 1-7
IPC 8 full level
E21B 3/00 (2006.01); E21B 7/02 (2006.01); E21B 7/08 (2006.01); E21B 7/18 (2006.01); E21B 17/20 (2006.01); E21B 19/22 (2006.01); E21B 19/24 (2006.01); E21C 25/60 (2006.01); E21C 35/23 (2006.01)
CPC (source: EP US)
E21B 7/18 (2013.01 - EP US); E21B 17/20 (2013.01 - EP US); E21B 19/08 (2013.01 - EP US); E21B 19/22 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH FR GB IT LI
DOCDB simple family (publication)
EP 0131771 A1 19850123; EP 0131771 B1 19870401; AT E26326 T1 19870415; DE 3322427 A1 19850110; DE 3322427 C2 19850613; US 4625815 A 19861202
DOCDB simple family (application)
EP 84106927 A 19840616; AT 84106927 T 19840616; DE 3322427 A 19830622; US 61443384 A 19840525