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 |
MX2015008990(A) |
申请公布日期 |
2015.10.14 |
申请号 |
MX20150008990 |
申请日期 |
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 |
分类号 |
E21B17/042;C25D7/04;F16L15/00 |
主分类号 |
E21B17/042 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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