THREADED JOINT FOR OIL WELL PIPE
    326.
    发明公开
    THREADED JOINT FOR OIL WELL PIPE 有权
    SCHRAUBVERBINDUNGFÜRÖLFELDROHRE

    公开(公告)号:EP1211451A1

    公开(公告)日:2002-06-05

    申请号:EP00954946.0

    申请日:2000-08-24

    Abstract: A threaded joint for an oil well pipe is provided which prevents the occurrence of galling at the time of repeated tightening and loosening and which provides a high degree of air tightness and has excellent galling resistance and air tightness without using a liquid lubricant such as a compound grease.

    1. A lubricating film of an inorganic polymeric compound which has an M (metal element)-O (oxygen) backbone and has a solid lubricant dispersed therein is formed on a threaded portion or an unthreaded metal contact portion.
    2. A phosphate film and the lubricating film of the inorganic polymeric compound is formed on the threaded portion or the unthreaded metal contact portion.
    3. A Cu plating layer and the lubricating film of the inorganic polymeric compound or a lubricating film of a resin in which a solid lubricant is dispersed is formed on the threaded portion or the unthreaded metal contact portion.
    4. A lubricating film of the inorganic polymeric compound or a lubricating film of the polymer and a rust preventing film containing an alkali metal salt of a carboxylic acid or an alkali earth metal salt of a carboxylic acid are formed on the threaded portion or the unthreaded metal contact portion.

    Abstract translation: 提供一种用于油井管的螺纹接头,其防止在反复拧紧和松动时发生磨损,并且提供高度的气密性并且在不使用液体润滑剂如化合物的情况下具有优异的耐磨损性和气密性 润滑脂。 1.在螺纹部分或无螺纹金属接触部分上形成具有M(金属元素)-O(氧)主链并分散有固体润滑剂的无机聚合物的润滑膜。 磷酸盐膜和无机高分子化合物的润滑膜形成在螺纹部分或无螺纹金属接触部分上。 在螺纹部分或无螺纹金属接触部分上形成Cu镀层和无机聚合物的润滑膜或其中分散有固体润滑剂的树脂的润滑膜。 4.在螺纹部分或无螺纹部分上形成无机聚合物的润滑膜或聚合物的润滑膜和含有羧酸的碱金属盐或羧酸的碱土金属盐的防锈膜 金属接触部分。

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