EP 2434086 A1 20120328 - A rock drill bit and a drilling assembly for percussive rock drilling
Title (en)
A rock drill bit and a drilling assembly for percussive rock drilling
Title (de)
Gesteinsbohrmeißel und Bohranordnung zum Perkussionsgesteinsbohren
Title (fr)
Taillant de fleuret et ensemble de forage pour perçage de roche à percussion
Publication
Application
Priority
EP 10178387 A 20100922
Abstract (en)
A rock drill bit (30) for percussive drilling comprises a bit head configured to be attached at an end of a drill element (33) of a drilling assembly and having a diameter larger than that of said drill element. The bit head has at a front end (38) as seen in the intended drilling direction a plurality of buttons (41) distributed over said bit head and configured to engage material to be crushed. At least one of said buttons is allowed to rotate about its own symmetry axis.
IPC 8 full level
E21B 10/36 (2006.01)
CPC (source: EP KR US)
E21B 10/36 (2013.01 - EP KR US)
Citation (search report)
- [Y] US 6105693 A 20000822 - INGMARSSON KARL [US]
- [Y] US 4553615 A 19851119 - GRAINGER ALFRED J [GB]
- [A] US 4751972 A 19880621 - JONES KENNETH W [US], et al
- [A] US 2007278017 A1 20071206 - SHEN YUELIN [US], et al
- [A] US 7762359 B1 20100727 - MIESS DAVID P [US]
- [A] US 2008017419 A1 20080124 - COOLEY CRAIG H [US], et al
- [A] US 4690228 A 19870901 - VOELZ DIETER [DE], et al
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 SE SI SK SM TR
Designated extension state (EPC)
BA ME RS
DOCDB simple family (publication)
EP 2434086 A1 20120328; EP 2434086 B1 20130515; AU 2011304382 A1 20130411; AU 2011304382 B2 20150115; AU 2011304461 A1 20130411; AU 2011304461 B2 20150903; AU 2015238819 A1 20151029; BR 112013006621 A2 20160621; BR 112013006623 A2 20160628; CA 2811674 A1 20120329; CA 2812600 A1 20120329; CN 103261561 A 20130821; CN 103339339 A 20131002; EP 2619396 A1 20130731; KR 20140005880 A 20140115; KR 20140009149 A 20140122; RU 2013118265 A 20141027; RU 2013118269 A 20141027; RU 2571783 C2 20151220; US 2013180784 A1 20130718; US 2013180785 A1 20130718; WO 2012038342 A1 20120329; WO 2012038428 A1 20120329; ZA 201302143 B 20140925
DOCDB simple family (application)
EP 10178387 A 20100922; AU 2011304382 A 20110920; AU 2011304461 A 20110916; AU 2015238819 A 20151007; BR 112013006621 A 20110916; BR 112013006623 A 20110920; CA 2811674 A 20110916; CA 2812600 A 20110920; CN 201180046041 A 20110916; CN 201180046043 A 20110920; EP 11757880 A 20110920; EP 2011066114 W 20110916; EP 2011066323 W 20110920; KR 20137010145 A 20110916; KR 20137010147 A 20110920; RU 2013118265 A 20110916; RU 2013118269 A 20110920; US 201113825416 A 20110916; US 201113825533 A 20110920; ZA 201302143 A 20130320