EP 2358969 A1 20110824 - HYBRID DRILL BIT WITH HIGH PILOT-TO JOURNAL DIAMETER RATIO
Title (en)
HYBRID DRILL BIT WITH HIGH PILOT-TO JOURNAL DIAMETER RATIO
Title (de)
HYBRIDBOHRKRONE MIT HOHEM VERHÄLTNIS ZWISCHEN PILOT- UND ACHSDURCHMESSER
Title (fr)
TRÉPAN HYBRIDE À RAPPORT ÉLEVÉ ENTRE LE DIAMÈTRE DU TOURILLON ET CELUI DU PILOTE
Publication
Application
Priority
- US 2009067969 W 20091215
- US 13939208 P 20081219
- US 48141009 A 20090609
Abstract (en)
[origin: US2010155146A1] The invention disclosed and taught herein is directed to an improved hybrid drill bit and associated elements having at least two rolling cutters, each rotatable around separate spindles on the bit, and at least one fixed blade. The improved drill bit expands the pilot pin to journal diameter ratio within the body of the rolling cutter, but within the confines of the allowable space of the rolling cutter.
IPC 8 full level
E21B 10/14 (2006.01); E21B 10/22 (2006.01); E21B 10/62 (2006.01)
CPC (source: EP US)
E21B 10/14 (2013.01 - EP US); E21B 10/22 (2013.01 - EP 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 MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
US 2010155146 A1 20100624; BR PI0922569 A2 20151215; CA 2747434 A1 20100715; EP 2358969 A1 20110824; EP 2358969 A4 20140820; EP 2358969 B1 20170517; MX 2011005857 A 20110617; RU 2011129565 A 20130127; RU 2541414 C2 20150210; WO 2010080380 A1 20100715
DOCDB simple family (application)
US 48141009 A 20090609; BR PI0922569 A 20091215; CA 2747434 A 20091215; EP 09837870 A 20091215; MX 2011005857 A 20091215; RU 2011129565 A 20091215; US 2009067969 W 20091215