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    • 17. 发明授权
    • Mud diverter for earth-boring bit
    • 泥土分流器为地球钻头
    • US07306061B2
    • 2007-12-11
    • US11060331
    • 2005-02-17
    • Chih C. LinGregory L. Ricks
    • Chih C. LinGregory L. Ricks
    • E21B10/22
    • E21B10/25
    • A rolling cone earth boring bit has a diverter and an arcuate segment located between the bit leg and the back face of the cone to divert debris from the seal gland area. The diverter has an oblong or oval base that inserts into a mating hole in a last machined surface of the bit. The diverter has a head that is wedge-shaped and protrudes from the hole into a clearance between the back face and the last machined surface. The head has an inner side that is spaced from an annular wall of the back face by a small uniform clearance. The head has an outer side that is oblique to the annular wall of the back face region to divert debris from the clearance. The segment is spaced from the diverter and is concentric to an axis of the bearing pin.
    • 滚动钻孔钻头具有分流器和位于钻头腿和锥体的后表面之间的弧形段,以从密封压盖区域中转移碎屑。 分流器有一个长圆形或椭圆形的底座,插入钻头的最后加工表面中的一个配合孔中。 分流器具有楔形的头部,并且从孔中突出到后表面和最后加工表面之间的间隙。 头部具有与背面的环形壁间隔开的小的均匀间隙的内侧。 头部具有与背面区域的环形壁倾斜的外侧,以从间隙转移碎屑。 该段与分流器间隔开并且与轴承销的轴线同心。