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1. 发明授权

US4466621A Rotary drill bit multiple seal assembly 失效
标题翻译：旋转钻头多重密封组件
公开(公告)号：US4466621A
公开(公告)日：1984-08-21
申请号：US445053
申请日：1982-11-29
申请人： Lloyd L. Garner , Samuel R. Westfall , Dwight A. Rife
发明人： Lloyd L. Garner , Samuel R. Westfall , Dwight A. Rife
IPC分类号： E21B10/22 , E21B10/25 , F16J15/32 , F16J15/34 , F16J15/24 , F16J15/38
CPC分类号： E21B10/25 , F16J15/32 , F16J15/3456 , F16C2352/00 , F16C33/72 , Y10S277/91
摘要： An improved seal assembly for utilization with earth boring drilling bits employing roller cutters. The improved seal is constructed utilizing two resilient O-rings or other resilient seals engaging opposing surfaces in the roller cutter and the corner formed by the shaft and face of the cutter support. The O-rings are mounted in and separated by a flexible floating ring of slightly harder material than the O-ring material. The flexible floating ring may be coated with or made from a material which provides a low coefficient of friction, permitting the O-rings to rotate therein. In an alternate embodiment of the present invention the flexible floating ring is tapered so that increased loading of the earth boring drilling bit will result in increased compression of the resilient O-rings, thus improving the seal under high load conditions. The improved seal of the present invention will accommodate substantial radial, axial and angular displacements of the roller cutter while satisfactorily inhibiting the ingress of detritus and the egress of lubricant.
摘要翻译：一种改进的密封组件，用于利用采用滚刀的钻孔钻头。改进的密封件利用两个弹性O形环或其它弹性密封件构成，该密封件与滚子切割器中的相对表面和由切割器支撑件的轴和面形成的角部相啮合。 O形圈通过比O形圈材料稍稍硬的材料的柔性浮环安装在其中并分开。柔性浮环可以涂覆或由提供低摩擦系数的材料制成，允许O形环在其中旋转。在本发明的替代实施例中，柔性浮环是锥形的，使得钻孔钻头的增加的负载将导致弹性O形环的增加的压缩，从而在高负载条件下改善密封。本发明的改进的密封件将适应滚子切割器的大量径向，轴向和角位移，同时令人满意地抑制碎屑的进入和润滑剂的排出。

2. 发明授权

US4194795A Seal protector for a sealed bearing rock bit 失效
标题翻译：密封保护器用于密封轴承岩石钻头
公开(公告)号：US4194795A
公开(公告)日：1980-03-25
申请号：US881618
申请日：1978-02-27
申请人： Dwight A. Rife
发明人： Dwight A. Rife
IPC分类号： E21B10/22 , E21B10/25 , F16J15/32 , F16C33/76
CPC分类号： E21B10/25 , F16J15/32
摘要： A rock bit having a seal protector positioned within each seal gland for eliminating shale packing behind the seal and restricting the axial movement of the seal. The rock bit includes a bit body having a plurality of legs depending therefrom, each leg having a cutter rotatively mounted thereon. A seal is positioned between each cutter and leg to prevent lubricant from leaking to the exterior of the bit and prevent drilling fluid, shale or the like from entering into the bearing area. Each seal protector comprises an annular ring located within each gland on the side of the seal facing the exterior of the bit. The annular ring extends the full length of the gland between the cutter and leg for preventing the shale and other debris from passing therethrough to attack the seal. The annular ring also fully extends across the clearance between the seal and the gland width to restrict the seal from axial movement due to internal and external pressure differentials and prevent the seal from bunching or wrapping up. The annular ring further includes an inner contoured face made of a low coefficient of friction material which mates with the exterior side of the seal in order to reduce the friction between the cutter and the leg and extend the life of the seal.
摘要翻译：岩石钻头具有位于每个密封压盖内的密封保护器，用于消除密封件后面的页岩填料并限制密封件的轴向运动。岩石钻头包括具有从其上悬垂的多个腿的钻头体，每个腿具有可旋转地安装在其上的切割器。密封件位于每个切割器和腿部之间，以防止润滑剂泄漏到钻头的外部，并防止钻井液，页岩等进入轴承区域。每个密封保护器包括位于密封件侧面上的每个密封件内的环形环，其面向钻头的外部。环形环在切割器和腿之间延伸压盖的整个长度，以防止页岩和其他碎屑穿过其侵入密封件。环形环也完全延伸穿过密封件和压盖宽度之间的间隙，以限制由于内部和外部压力差导致的密封件的轴向运动，并防止密封件聚集或卷起。环形环还包括由摩擦系数低的材料制成的内部轮廓面，其与密封件的外侧配合，以便减少切割器和腿部之间的摩擦并延长密封件的使用寿命。

3. 发明授权

US4136586A Method for constructing a multiple segment rock bit 失效
标题翻译：构造多段岩石钻头的方法
公开(公告)号：US4136586A
公开(公告)日：1979-01-30
申请号：US842614
申请日：1977-10-17
申请人： William J. Neilson , Dwight A. Rife
发明人： William J. Neilson , Dwight A. Rife
IPC分类号： B23P15/28 , E21B10/20 , B21K5/02
CPC分类号： E21B10/20 , B23P15/28 , Y10T29/49758
摘要： The cone cutter of each segment of a multi-segment rock bit is assembled onto its segment. A pin end of the segment is supported by an index pin and axially constrained in the direction away from the cone cutter. The cone cutter is clamped against and dimensionally indexed on a cone saddle having a circular surface of a diameter corresponding to the gage diameter of the completed rock bit. The cone is loaded in a direction axially of the segment in a manner to simulate the loading of the hole bottom that is to be drilled by the rock bit. The segment away from the cone is also loaded radially of the axis of the segment to take up tolerances along the axis of rotation of the cone cutter. The constraint of the cone and loading of the segment simulate the hole wall force on the cone experienced at the gage row and takes up tolerances radially of the axis of rotation of the cone along a line to the gage row in contact with formation material. A bridge prevents rotation of the segment about its lengthwise axis. With the setting of all constraints, a clamp at the pin end of the segment locks the segment in place and the bridge is removed. The included angle between faying surfaces of the segment is then finished. Thereafter, enough finished segments to make a complete rock bit are assembled and welded together along their faying surfaces. The action of axial and radial loading of the cone in a manner to simulate drilling loading prior to finishing the segments assures that the cone axis, offset, and gage diameter are all proper in an assembled rock bit.
摘要翻译：多段岩石钻头的每个段的锥形切割机组装在其段上。该段的销端由分度销支撑并且沿远离锥形切割器的方向轴向约束。锥形切割器被夹紧并在尺寸上被索引在具有对应于完成的钻石钻头的计量直径的直径的圆形表面的锥形鞍座上。圆锥体以沿模拟轴承方向的方式装载，以模拟待钻石钻孔的孔底部的载荷。远离锥体的部分也沿着节段的轴线的径向加载以占据沿着锥形切割器的旋转轴线的公差。锥形件的限制和段的加载模拟了在量规行上遇到的锥体上的孔壁力，并且沿着与形成材料接触的量具行的线的旋转轴线的径向公差。桥梁防止片段围绕其纵向轴旋转。随着所有约束的设置，分段的销端处的夹具将段锁定到位，并且桥被移除。然后，段的贴合表面之间的夹角完成。此后，将足够的成品段制成完整的岩石钻头，沿着它们的拼接表面组装并焊接在一起。锥形件的轴向和径向载荷的作用是在完成切割段之前模拟钻井载荷的方式，确保锥形轴，偏移和计量直径在组装的岩石钻头中都是正确的。

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