HYBRID DRILL BIT WITH HIGH PILOT-TO JOURNAL DIAMETER RATIO
摘要
The invention disclosed and taught herein are directed to an improved hybrid drill bit and associated elements having at least two frusto-conical cutter assemblies, each rotatable around separate axles on the bit, and at least two fixed blade cutters adjacent the frusto-conical cutter assemblies. The improved drill bit expands the pilot pin to journal diameter ratio within the body of the frusto-conical cutter assembly, but within the confines of the allowable space of the frusto-conical cutter assembly.
申请公布号
WO2010080380(A1)
申请公布日期
2010.07.15
申请号
WO2009US67969
申请日期
2009.12.15
申请人
BAKER HUGHES INCORPORATED;NGUYEN, DON, Q.;ZAHRADNIK, ANTON, F.;PESSIER, RUDOLF, C.
发明人
NGUYEN, DON, Q.;ZAHRADNIK, ANTON, F.;PESSIER, RUDOLF, C.