公开(公告)号：US4176848A

公开(公告)日：1979-12-04

申请号：US920862

申请日：1978-06-30

申请人： David S. Lafuze

发明人： David S. Lafuze

IPC分类号： E21B10/22 ,  E21B10/25 ,  F16J15/34 ,  F16J15/16

CPC分类号： E21B10/25 ,  F16J15/344 ,  F16J15/3496 ,  Y10S277/91

摘要： A rolling cone cutter earth boring bit is provided with a seal assembly for sealing the bearings of the bit from the abrasive materials in the borehole and retaining lubricant within the bearing area. A rolling cone cutter is rotatably mounted on a cantilevered bearing pin extending from the bit body. A first seal receiving surface is located on said bearing pin. The first seal receiving surface has a first corner. A second seal receiving surface is located on said rolling cone cutter. The second seal receiving surface has a second corner. The seal assembly includes first and second seal units. The first seal unit comprises a first annular substantially rigid ring and a first substantially resilient ring positioned between said bearing pin and said rolling cone cutter. The first resilient ring is positioned in said first corner. The second seal unit comprises a second annular substantially rigid ring and a second substantially resilient ring positioned between said bearing pin and said rolling cone cutter. The second resilient ring is positioned in said second corner. The sliding interface between said first and second annular substantially rigid rings is inclined with respect to said bearing pin. The first and second substantially rigid rings are made of materials such as Teflon, nylon, plastic, metal or other substantially rigid materials.

摘要翻译： 滚动圆锥切割器钻孔钻具有密封组件，用于将钻头的轴承与钻孔中的研磨材料密封并将润滑剂保持在轴承区域内。 滚动圆锥切割器可旋转地安装在从钻头体延伸的悬臂轴承销上。 第一密封件接收表面位于所述轴承销上。 第一密封接收表面具有第一角。 第二密封件接收表面位于所述滚动锥形切割器上。 第二密封件接收表面具有第二角。 密封组件包括第一和第二密封单元。 第一密封单元包括第一环形基本刚性环和位于所述轴承销和所述滚动圆锥切割器之间的第一基本上弹性的环。 第一弹性环位于所述第一角。 第二密封单元包括位于所述轴承销和所述滚动锥形切割器之间的第二环形基本刚性环和第二基本上弹性的环。 第二弹性环位于所述第二拐角处。 所述第一和第二环形大致刚性环之间的滑动界面相对于所述支承销倾斜。 第一和第二基本上刚性的环由诸如特氟隆，尼龙，塑料，金属或其它基本上刚性的材料制成。