EP 0806543 B1 20010124 - Drilling apparatus for percussive drilling
Title (en)
Drilling apparatus for percussive drilling
Title (de)
Bohrvorrichtung für das schlagende Bohren
Title (fr)
Dispositif de perçage pour le forage à percussion
Publication
Application
Priority
DE 19618298 A 19960507
Abstract (en)
[origin: EP0806543A1] The bore head with the hammer is connected to a bore rod and possibly at least to a flow channel axially running in the bore rod. The bore head (10) cross-sectionally narrows from a hammer-type end disc (26) to the chisel or bore point (28) in several stages (26,27, 27a-27g), whereby the stage edges determine a cone cover (K). The axial heights (b) of the stages and/or their width may be approximately of the same size. The stages can be determined by the crown arrangement, the pins of which are outwardly inclined in the advance direction. The ratio of the diameter of the end disc to the diameter of the chisel or bore point is preferable approximately 7:1.
IPC 1-7
IPC 8 full level
E21B 7/06 (2006.01); E21B 7/26 (2006.01); E21B 10/38 (2006.01); E21B 10/40 (2006.01); E21B 10/56 (2006.01)
CPC (source: EP)
E21B 7/068 (2013.01); E21B 10/38 (2013.01); E21B 10/40 (2013.01); E21B 10/56 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR LI LU
DOCDB simple family (publication)
EP 0806543 A1 19971112; EP 0806543 B1 20010124; AT E198923 T1 20010215; DE 19618298 A1 19971113; DE 59702945 D1 20010301
DOCDB simple family (application)
EP 97105661 A 19970405; AT 97105661 T 19970405; DE 19618298 A 19960507; DE 59702945 T 19970405