发明名称 |
PIPE SCREW JOINT WITH LUBRICATING FILM |
摘要 |
A lubricating coating which is free from harmful heavy metals is formed on a premium threaded joint for pipes constituted by a pin and a box each having a contact surface comprising a threaded portion and an unthreaded metal contact portion (a sealing surface and shoulder) in order to provide the joint with galling resistance, gas-tightness, and anticorrosive properties such that the unthreaded metal contact portion is prevented from yielding even when the joint is made up with a high torque. The lubricating coating comprises one or both of a rosin and calcium fluoride; metal soap; wax; and a basic metal salt of an aromatic organic acid, and preferably it further includes a lubricating powder, magnesium carbonate, and/or a carbohydrate, particularly a cyclodextrin. |
申请公布号 |
EP2210931(A4) |
申请公布日期 |
2011.09.21 |
申请号 |
EP20080843819 |
申请日期 |
2008.10.31 |
申请人 |
SUMITOMO METAL INDUSTRIES, LTD.;VALLOUREC MANNESMANN OIL & GAS FRANCE |
发明人 |
GOTO, KUNIO;IMAI, RYUICHI;FUKUMOTO, SHIGEKI;YAMAMOTO, YASUHIRO |
分类号 |
C10M169/04;C10N10/04;C10N30/06;C10N30/12;C10N50/10;C10N80/00;F16L15/00;F16L15/08;F16L58/18 |
主分类号 |
C10M169/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|