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    • 4. 发明授权
    • Metal face seal for an earth-boring bit
    • 用于钻孔的金属表面密封
    • US07413037B2
    • 2008-08-19
    • US11226948
    • 2005-09-15
    • Chih LinDon Quy NguyenGregory L. RicksTerry J. Koltermann
    • Chih LinDon Quy NguyenGregory L. RicksTerry J. Koltermann
    • E21B10/22E21B10/25F16J15/22
    • E21B10/25
    • A metal face seal for an earth boring drill bit where the drill bit has a bit body, at least one bit leg, a bearing pin on each bit leg, and a cone rotatably mounted on each bearing pin. The metal face seal is located in the cavity formed between the interior surface of the cone and the bearing pin. The metal face seal consists of a rigid seal ring having a forward surface that engages a rotating seal surface of the cone. An energizer ring biases the rigid seal ring toward the rotating seal surface. A secondary seal engages the bearing pin surface, the energizer ring, and the rigid seal ring. The secondary seal ring has a protuberance on its forward side for filling void spaces between the energizer ring, the rigid seal ring, and the secondary seal ring.
    • 一种用于钻孔钻头具有钻头体,至少一个位腿,每个钻头腿上的支承销以及可旋转地安装在每个轴承销上的锥体的钻孔钻头的金属表面密封件。 金属表面密封件位于形成在锥体的内表面和轴承销之间的空腔中。 金属表面密封件由刚性密封环组成,其具有接合锥体的旋转密封表面的前表面。 活力环将刚性密封环朝向旋转的密封表面偏压。 辅助密封件接合轴承销表面,增力环和刚性密封环。 二次密封环在其前侧具有用于填充增力环,刚性密封环和次级密封环之间的空隙的突起。
    • 10. 发明授权
    • Anti-mud packing seal gland
    • 反泥包装密封胶
    • US07086487B2
    • 2006-08-08
    • US10602844
    • 2003-06-24
    • Don Quy Nguyen
    • Don Quy Nguyen
    • E21B10/25
    • E21B10/25
    • An earth boring bit has a seal cavity that is eccentric to agitate drilling fluid and avoid mud packing. The bit body having bit legs, each having a bearing pin. A cone rotatably mounts on the bearing pin. Teeth are formed or mounted on the cone for cutting the earth formation as the bit rotates. The cone has a backface adjacent the bit leg and an entrance portion to the cavity that intersects the backface. A seal assembly is in stationary engagement with the bearing pin and sliding engagement with the cone. An annular seal gland is located between an outer diameter portion of the bearing pin and the entrance portion of the cavity. The seal gland has a width that varies so that as the cone rotates, the width of the seal gland at any point along the outer diameter portion of the bearing pin changes at least once per revolution of the cone.
    • 地镗头具有密封腔,其偏心以搅拌钻井液并避免泥浆包装。 该钻头体具有位腿,每个都具有一个支承销。 圆锥体可旋转地安装在轴承销上。 齿形成或安装在锥体上,用于当钻头旋转时切割地层。 圆锥体具有邻近钻头腿的背面和与背面相交的空腔的入口部分。 密封组件与支承销固定接合并与锥体滑动接合。 环形密封压盖位于轴承销的外径部分和空腔的入口部分之间。 密封压盖具有变化的宽度,使得当锥体旋转时,沿着轴承销的外径部分的任何点处的密封压盖的宽度至少每转一圈更换一次。