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公开(公告)号：US4770259A
公开(公告)日：1988-09-13
申请号：US017596
申请日：1987-02-24
申请人： Kjell-Ove L. Jansson
发明人： Kjell-Ove L. Jansson
CPC分类号： E21B10/327 , E21B10/40 , E21B10/66 , E21B7/20
摘要： A drill tool for rotary and/or percussion drilling includes a drill string and a cutting apparatus connected to a lower end of the drill string. The cutting apparatus has an intermediate portion which is rotatable with the drill string and includes an outer surface, a reamer is mounted eccentrically on the intermediate portion for rotation relative thereto about a longitudinal axis. The reamer includes an inner surface facing the outer surface. The reamer is driven by an arrangement comprised of a tongue disposed on either of the inner and outer surfaces and a pair of circumferentially spaced shoulder surfaces disposed on the other of the inner and outer surfaces. The tongue is selectively engageable with the shoulder surfaces along an area of contact having an upper longitudinal end which terminates below an uppermost end of the reamer, and a lower longitudinal end which terminates above a lowermost end of the reamer.
摘要翻译： 用于旋转和/或冲击钻孔的钻具包括钻柱和连接到钻柱的下端的切割装置。 切割装置具有可与钻柱一起旋转并包括外表面的中间部分，扩展器偏心地安装在中间部分上，用于围绕纵向轴线相对于其旋转。 铰刀包括面向外表面的内表面。 铰刀由包括设置在内表面和外表面中的任一个上的舌片以及设置在内表面和外表面上的另一个上的一对周向间隔开的肩部表面的布置驱动。 所述舌片沿着具有在所述铰刀的最上端终止的上纵向端部的接触区域选择性地接合，以及在所述铰刀的最下端终止的下纵向端。
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公开(公告)号：US4760887A
公开(公告)日：1988-08-02
申请号：US831634
申请日：1986-02-21
IPC分类号： E21B17/042 , F16B7/18 , E21B17/02
CPC分类号： E21B17/0426 , Y10T403/5746 , Y10T403/68
摘要： The invention relates to a drill element for percussion drilling, the element having a cylindrical screw thread having one single entry. The screw thread, that is intended for thread diameters of less than 30 mm, has a pitch of less than 12 mm, a shoulder angle of less than 69.degree., and a pitch angle of less than 11.degree. but more than 5.6.degree..
摘要翻译： 本发明涉及一种用于冲击钻孔的钻孔元件，该元件具有一个具有一个入口的圆柱形螺纹。 用于螺纹直径小于30mm的螺纹，螺距小于12mm，肩角小于69°，螺距角小于11°，但大于5.6°。
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