发明名称 |
Galling resistant drill pipe tool joint and corresponding drill pipe |
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. |
申请公布号 |
NO20150898(A1) |
申请公布日期 |
2015.07.09 |
申请号 |
NO20150000898 |
申请日期 |
2015.07.09 |
申请人 |
TENARIS CONNECTIONS LIMITED |
发明人 |
NARIKAWA TOMOYUKI;ONO TATSUO;SAKURA KOJI;FUKUI TOSHIHIKO;YOSHIDA MOTOHISA;KUWANO TAKESHI;KOBAYASHI NOBUO;SATO NOBUHIDE |
分类号 |
E21B17/042;C25D7/04 |
主分类号 |
E21B17/042 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|