公开(公告)号：US20150368986A1

公开(公告)日：2015-12-24

申请号：US14760300

申请日：2013-01-11

申请人： TENARIS CONNECTIONS LIMITED

发明人： Tomoyuki Narikawa ,  Tatsuo Ono ,  Koji Sakura ,  Toshihiko Fukui ,  Motohisa Yoshida ,  Takeshi Kuwano ,  Nobuo Kobayashi ,  Nobuhide Sato

IPC分类号： E21B17/042 ,  E21B19/16 ,  E21B17/00

CPC分类号： E21B17/042 ,  C25D7/04 ,  E21B17/00 ,  E21B19/16

摘要： A drill pipe tool joint comprising: a pin including a male threaded portion at an outer surface; and a box including a female threaded portion at an inner surface, the female threaded portion to be screwed and fastened to the male threaded portion in a contacting zone consisting of a male threaded contacting surface and a female threaded contacting surface, wherein at least a portion of the male threaded contacting surface or a portion of the female threaded contacting surface is a surface layer consisting of a hard metal and respectively at least a portion of the female threaded contacting surface or a portion of the male threaded contacting surface is a surface layer consisting of a soft material and where said both surface portions are contacting surfaces after screwing.

摘要翻译： 一种钻杆工具接头，包括：销，其在外表面包括阳螺纹部分; 以及包括在内表面上的内螺纹部分的箱体，所述阴螺纹部分在由阳螺纹接触表面和内螺纹接触表面组成的接触区域中被螺纹连接并紧固到阳螺纹部分，其中至少一部分 阳螺纹接触表面或内螺纹接触表面的一部分是由硬金属组成的表面层，并且分别是阴螺纹接触表面的至少一部分或阳螺纹接触表面的一部分是表面层， 并且其中所述两个表面部分在旋拧之后都是接触表面。