公开(公告)号：US4708038A

公开(公告)日：1987-11-24

申请号：US901626

申请日：1986-08-29

申请人： Dieter Hellnick ,  Karl J. Victor ,  Gregory K. Otten

发明人： Dieter Hellnick ,  Karl J. Victor ,  Gregory K. Otten

IPC分类号： E21B17/042 ,  F16L15/06 ,  B23C1/00 ,  B23G1/22 ,  B65D59/00 ,  F16L57/00

CPC分类号： F16L15/002 ,  B23B1/00 ,  B23G1/22 ,  E21B17/0423 ,  F16L15/003 ,  B23B2220/123 ,  B23G2210/04 ,  B23G2210/44 ,  B23G2240/36 ,  Y10T403/556 ,  Y10T403/68 ,  Y10T82/10 ,  Y10T82/20

摘要： Disclosed is a method directed particularly to improving a modified threaded buttress collar. The method is also of value with any internally threaded member having a seal ring groove therein. The method specifically deals with the removal of the feather edge thread created when a seal ring groove is placed within an internally threaded member. Such groove usually provides residence for a seal ring. When the groove is placed in the internally threaded member there is created a feather edge thread immediately adjacent the groove. This feather edge thread is easily deformable and can create severe galling problems within the coupling.The feather edge is removed, preferably, in stepped fashion utilizing a machining tool such as a grooving tool within a computer numerically controlled lathe. The grooving tool is set such that as the coupling turns in the lathe, the movement of the grooving tool matches the pitch and helix of the threads and the speed of the lathe. However, the grooving tool is offset such that it is placed on a collision course with the thread. The groove allows some running time for the grooving tool to be properly positioned for the specific thread pitch and helix. The feather edge is removed in several passes, each being deeper than the last until, ultimately, the feather edge is removed to a depth equal to the depth of the finished threads.

摘要翻译： 公开了一种特别涉及改进改进的螺纹支撑套环的方法。 该方法对于其中具有密封环槽的任何内螺纹构件也是有价值的。 该方法专门涉及当将密封环槽放置在内螺纹构件内时产生的羽毛边缘线的移除。 这种凹槽通常为密封圈提供住所。 当凹槽放置在内螺纹构件中时，产生紧邻凹槽的羽毛边缘线。 该羽毛边缘线易于变形，并可能在联轴器内产生严重的磨损问题。 优选地，使用诸如计算机数控车床内的切槽工具的加工工具以阶梯形式去除羽毛边缘。 切槽工具被设置成使得当联接器在车床中转动时，切槽工具的移动与螺纹的螺距和螺旋线和车床的速度相匹配。 然而，切槽工具被偏移，使得其与螺纹处于碰撞过程。 沟槽允许一些开槽工具的运行时间适当地定位于特定的螺距和螺旋。 羽毛边缘在多个通道中被移除，每个通道都比最后一个更深，直到最终将羽毛边缘移除到等于成品螺纹的深度的深度。

公开(公告)号：US4763737A

公开(公告)日：1988-08-16

申请号：US895125

申请日：1986-08-11

申请人： Dieter Hellnick

发明人： Dieter Hellnick

IPC分类号： E21B10/58 ,  E21B10/60 ,  E21B29/00

CPC分类号： E21B10/60 ,  E21B10/58 ,  E21B29/00

摘要： Disclosed is a drill bit for use downhole in oil and gas wells. It is particularly adoptable for use in removing obstructions such as well packers which may become jammed within the casings of oil and gas wells. Cutters are arranged on the cutting face of the drill bit in arc-like patterns of decreasing radius. The shear angle of each cutter combined with the arc-like pattern in which the cutters are arranged serve to direct the cuttings and drilling debris inward toward the central bore. Fluid can be pumped down through the well casing and circulated about the drill bit through longitudinal channels provided in the main body of the drill bit. In such manner, the fluid circulates downward within the casing and across the cutting face of the drill bit carrying the cuttings and drilling debris up through the central bore thus preventing the cuttings in drilling debris from building up within the casing or causing the drill bit to jam within the casing.

摘要翻译： 公开了一种用于油气井井下钻头。 特别适用于去除可能在油气井的壳体内堵塞的封隔器等障碍物。 刀具以减小半径的弧形图案布置在钻头的切割面上。 每个切割器与其中布置有切割器的弧形图案的剪切角度一起用于将切屑和钻屑向内引导到中心孔。 流体可以通过井套管向下泵送并通过设置在钻头主体中的纵向通道围绕钻头循环。 以这种方式，流体在壳体内向下流动并穿过钻头的切割面，并将钻屑运送穿过中心孔，从而防止钻孔中的钻屑在壳体内积聚或使钻头 堵塞在套管内。