EP 2198110 B1 20170215 - BIT ASSEMBLY
Title (en)
BIT ASSEMBLY
Title (de)
BOHRMEISSELANORDNUNG
Title (fr)
ENSEMBLE FORET
Publication
Application
Priority
- FI 2008000087 W 20080710
- FI 20070540 A 20070710
Abstract (en)
[origin: WO2009007494A1] A bit assembly in a drilling apparatus working by hammering and /or rotating said assembly comprising of a pilot bit (1) drilling the central part of the hole and a ring bit (2), fitted in connection with said pilot bit(l) and furnished with cylindrical inner surface drilling the outer surface of said hole, and further, between the pilot bit (1) and ring bit (2) a blocking arrangement of mutual rotation and axial movement, whereby opening of said blocking arrangement makes it possible to pull the pilot bit (5) off the hole, while ring bit (2) remains in the hole, and the bit assembly comprises a casing tube and its extension (6) and an interlocking system, which is through a ring-shaped device (8) from the extension (6) of the casing tube adapted to transfer pulling force from the pilot or ring bit to the casing tube extension (6) and said interlocking system can be opened in order to continue drilling with the ring and pilot bits (1, 2) when the casing tube remains in its place. That the ring like device (8) comprises parts directed to the inside, by means of which said device is permissively fitted to rotate into the traverse groove (10) on the outer surface of either the pilot or ring bit so that its motion is limited or blocked, in both axial directions.
IPC 8 full level
E21B 7/20 (2006.01); E21B 10/62 (2006.01); E21B 10/64 (2006.01); E21B 17/046 (2006.01)
CPC (source: EP KR US)
E21B 7/20 (2013.01 - EP KR US); E21B 10/62 (2013.01 - EP KR US); E21B 10/64 (2013.01 - EP KR US); E21B 17/046 (2013.01 - EP KR US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2009007494 A1 20090115; BR PI0814214 A2 20150127; CA 2693781 A1 20090115; EP 2198110 A1 20100623; EP 2198110 A4 20151223; EP 2198110 B1 20170215; ES 2625464 T3 20170719; FI 20070540 A0 20070710; JP 2010533250 A 20101021; JP 5443349 B2 20140319; KR 101678358 B1 20161123; KR 20100043222 A 20100428; US 2010200303 A1 20100812
DOCDB simple family (application)
FI 2008000087 W 20080710; BR PI0814214 A 20080710; CA 2693781 A 20080710; EP 08787686 A 20080710; ES 08787686 T 20080710; FI 20070540 A 20070710; JP 2010515539 A 20080710; KR 20107003054 A 20080710; US 66832308 A 20080710