A bit body for a drill bit for horizontal directional drilling includes a pair of legs and a small wedge member disposed between the pair of legs. A roller cone is rotatably mounted to each bearing shaft extending from a respective leg. The roller cones support full coverage cutting structures. A center jet nozzle is configured to direct drilling fluid between the pair of roller cones. A stabilizer member maintains an upright drilling position of the drill bit within the borehole.
申请公布号
WO2015120311(A1)
申请公布日期
2015.08.13
申请号
WO2015US14880
申请日期
2015.02.06
申请人
VAREL INTERNATIONAL IND., L.P.
发明人
HARRINGTON, DAVID, MICHEL;KING, WILLIAM, W.;MAURSTAD, CARY, ANDREW