Global Patent Index - EP 1162037 A1

EP 1162037 A1 2001-12-12 - Rotary percussion device for a drill string

Title (en)

Rotary percussion device for a drill string

Title (de)

Drehschlagvorrichtung für ein Bohrgestänge

Title (fr)

Dispositif de rotation-percussion pour une tige de forage

Publication

EP 1162037 A1 (DE)

Application

EP 00112146 A

Priority

EP 00112146 A

Abstract (en)

The rotary hammer device (1) has a hammer (6) and an insert end (3) rotatably mounted in a body (8) of the device. This insert end has an axially aligned bore (37) in which a hammer piston (4) is mounted displaceable. A first end (42) of the piston faces the hammer device and the second end (43) faces the hammer receiver (2) so that knocks sent out from the hammer device can be transferred directly to the receiver through the hammer piston. The insert end has elements (35) coupled in keyed engagement with the rotary device (5) which preferably has a pneumatic or hydraulically operating rotary drive.

Abstract (de)

Die erfindungsgemässe, zum Antreiben wenigstens eines Bohrgestänges (2) dienende Drehschlagvorrichtung (1) verfügt über eine Schlag- und eine Drehvorrichtung (5, 6) sowie ein in einem Vorrichtungskörper (8) drehbar gelagertes Einsteckende (3), das eine axial verlaufende Bohrung aufweist, in der ein Schlagkolben (4) verschiebbar gelagert ist. Das mittels einem Verbindungsstück (33) mit dem Bohrgestänge (2) verbundene Einsteckende (3) wird von der Drehvorrichtung (5) und der im Einsteckende (3) gelagerte Schlagkolben (4) wird unabhängig davon von der Schlagvorrichtung (6) angetrieben. Die über den Schlagkolben (4) auf das Bohrgestänge (2) übertragene Schlagenergie, hat daher stark reduzierte Auswirkungen auf das erfindungsgemäss von der Schlagvorrichtung (5) entkoppelte Einsteckende (3), so dass frühzeitige Materialermüdungen vermieden werden. Die beim Betrieb der erfindungsgemässen Drehschlagvorrichtung (1) auftretenden Lärmemissionen sind zudem stark reduziert. <IMAGE>

IPC 1-7 (main, further and additional classification)

B25D 9/06

IPC 8 full level (invention and additional information)

B25D 15/00 (2006.01); B25D 16/00 (2006.01); B25D 17/24 (2006.01); E21B 6/04 (2006.01); E21B 17/03 (2006.01)

CPC (invention and additional information)

B25D 16/00 (2013.01); B25D 17/245 (2013.01); E21B 6/04 (2013.01); E21B 17/03 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 1162037 A1 20011212; EP 1162037 B1 20050810; AT 301533 T 20050815; AU 6000501 A 20011217; CA 2410400 A1 20021121; DE 50010923 D1 20050915; DK 1162037 T3 20051212; ES 2246771 T3 20060301; PT 1162037 E 20051031; US 2004099425 A1 20040527; US 6843329 B2 20050118; WO 0194079 A1 20011213

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