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    • 73. 发明公开
    • COMPOSITE DRILL BIT
    • 复合钻头
    • EP2594729A1
    • 2013-05-22
    • EP11806308.0
    • 2011-07-15
    • Southwest Petroleum University
    • YANG, Ying XinCHEN, LianLIN, MinPEI, ZhuREN, Hai Tao
    • E21B10/14E21B10/16E21B10/50
    • E21B10/16E21B10/14E21B10/20E21B10/50
    • A composite drill bit comprises: a drill bit body (1), a scraping-wheel (2), the drill bit body (1) further comprises a bit leg (3). The scraping-wheel (2) is mounted for rotation on the corresponding journal (6) of the bit leg (3), an outer-ring (4) is deployed on the scraping-wheel (2), wherein: the angular deflection α of the scraping-wheel (2) is in the range of 20° ≤ | α | ≤ 90°, the fixed cutting unit (8) with fixed cutters (8a) fixed thereon is deployed on the drill bit body (1). In the present invention, cutters on the scraping-wheel break rock by means of successive scraping, forming a cross-cutting area on the bottomhole accompanied by the cutters on the fixed cutting unit, thus achieving high rock-breaking efficiency, even wear, high cooling performance, and a longer service life for the cutters, bearings and the drill bit.
    • 一种复合钻头,包括:钻头体(1),刮轮(2),钻头体(1)还包括钻头腿(3)。 所述刮轮(2)安装成在所述钻头腿(3)的相应轴颈(6)上旋转,在所述刮轮(2)上部署外环(4),其中:所述角偏转α (2)的范围在20°≤|α|的范围内 ≤90°时,在钻头体(1)上部署固定有切割器(8a)的固定切割单元(8)。 在本发明中,刮轮上的刀具通过连续刮削破碎岩石,在固定的切割单元上配合刀具在底孔上形成横切区域,从而实现高的破岩效率,均匀的磨损,高的 冷却性能以及刀具,轴承和钻头的更长使用寿命。
    • 78. 发明公开
    • HIGH DENSITY ROW ON ROLLER CONE BIT
    • 辊子锥上的高密度行
    • EP2010746A1
    • 2009-01-07
    • EP07754623.2
    • 2007-04-03
    • BAKER HUGHES INCORPORATED
    • CEPEDA, Karlos, B.BUSKE, Robert, J.OVERSTREET, James, L.PESSIER, Rudolph, C.
    • E21B10/16
    • E21B10/16
    • An earth-boring bit has a high density row (49) on one of its cones (31). Each cone has a nose area and a gage area with a heel row (47) of teeth at the gage area. One of the cones has a farther intermediate row (43) of teeth and another one of the cones has a closer intermediate row (37) of teeth. The remaining cone has a high density row of teeth (32), which is located closer to the axis of rotation of the bit than the farther intermediate row and farther from the axis of rotation of the bit than the closer intermediate row. The high density row has a smaller pitch between crests of the teeth than the closer and farther intermediate rows. The smaller pitch provides more teeth in the high density row than in the closer intermediate row and the farther intermediate row.
    • 钻地钻头在其锥体(31)的一个上具有高密度排(49)。 每个锥体都有一个鼻部区域和一个测量区域,在测量区域有一排齿(47)。 其中一个锥体具有更远的中间排(43),另一个锥体具有更接近的中间排(37)的齿。 剩余的锥体具有高密度的一排齿(32),该齿排位于比中间行更靠近钻头的旋转轴线的位置,并且比钻头的中间行更靠近钻头的旋转轴线。 高密度排在齿的齿顶之间的间距比较近和较远的中间排小。 较小的节距在高密度排中比在较接近的中间排和较远的中间排中提供更多的齿。