发明名称 |
Threaded joint for steel pipes |
摘要 |
A threaded joint for steel pipes comprising a pin 1 and a box 2 each having a contact surface comprising a threaded portion 3 or 4 and an unthreaded metal contact portion 8 is provided with improved anti-galling propertied by forming a lubricating coating on the contact surface of at least one of the pin and the box, the lubricating coating exhibiting a self-repairing function by liquid lubrication and having a decreased greasiness. The lubricating coating is (1) a coating which comprises a lower lubricant layer which is in liquid form in the temperature range of above 0° C. and below 40° C. and an upper lubricant layer which is in solid form at 40° C., or (2) a coating which is semi-solid or solid at 40° C. and is formed of a mixture comprising a lubricating oil which is in liquid form in the temperature range of above 0° C. and below 40° C. and a wax which is in solid form at 40° C., the mixture preferably having been heated so as to liquefy the wax and dissolve in each other the wax and lubricant oil.
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申请公布号 |
US2004239105(A1) |
申请公布日期 |
2004.12.02 |
申请号 |
US20040765837 |
申请日期 |
2004.01.29 |
申请人 |
MATSUMOTO KEISHI;GOTO KUNIO;ANRAKU TOSHIRO;NAGASAKU SHIGEO;YAMAMOTO HIDEO |
发明人 |
MATSUMOTO KEISHI;GOTO KUNIO;ANRAKU TOSHIRO;NAGASAKU SHIGEO;YAMAMOTO HIDEO |
分类号 |
F16L15/04;C10M177/00;F16L15/00;F16L15/06;(IPC1-7):F16L9/00 |
主分类号 |
F16L15/04 |
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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