发明名称 |
РЕЗЬБОВОЕ СОЕДИНЕНИЕ ДЛЯ СТАЛЬНЫХ ТРУБ, ИМЕЮЩЕЕ УЛУЧШЕННЫЕ СОПРОТИВЛЕНИЕ ИСТИРАНИЮ И СВОЙСТВА, ПРЕДОТВРАЩАЮЩИЕ РЖАВЧИНУ |
摘要 |
In a threaded joint for steel pipes comprising a pin and a box capable of mating with each other, the pin having an externally threaded portion and an unthreaded metal contact portion as a mating surface, and the box having an internally threaded portion and an unthreaded metal contact portion as a mating surface, the mating surface of at least one of the pin and the box is coated with a lower porous zinc or zinc alloy layer by blast plating and with an upper coating which is either a solid lubricating coating (comprising a lubricating powder in an organic or in organic binder) or a liquid, heavy metal powder-free coating (e.g., a liquid coating based on a highly basic organic acid metal salt such as a highly basic metal sulfonate). The threaded joint exhibits improved galling resistance, rust-preventing properties, and gas tightness even after exposure to a high temperature and makes it possible to perform repeated fastening (make-up) and loosening (break-out) in a high-temperature oil well without application of a compound grease containing a heavy metal powder. <IMAGE> |
申请公布号 |
RU2003125847(A) |
申请公布日期 |
2005.01.10 |
申请号 |
RU20030125847 |
申请日期 |
2002.01.23 |
申请人 |
СУМИТОМО МЕТАЛ ИНДАСТРИЗ, ЛТД. (JP) |
发明人 |
ГОТО Кунио (JP);АНРАКУ Тосиро (JP) |
分类号 |
E21B17/042;C10M103/00;C10M103/02;C10M103/06;C10M105/72;C10M105/74;C10M107/38;C10M143/02;C10M145/20;C10M145/24;C10M149/18;C10M151/04;C10M155/00;C10M155/02;C10M159/20;C10M159/22;C10M159/24;C10N10/02;C10N10/04;C10N10/06;C10N10/08;C10N10/12;C10N10/14;C10N20/00;C10N30/06;C10N30/12;C10N40/00;C10N50/02;C10N50/08;F16L15/00;F16L15/04;F16L58/08;F16L58/18 |
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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