THREADED JOINT FOR OIL WELL PIPE
    271.
    发明申请
    THREADED JOINT FOR OIL WELL PIPE 审中-公开
    螺纹管油管

    公开(公告)号:WO01016516A1

    公开(公告)日:2001-03-08

    申请号:PCT/JP2000/005661

    申请日:2000-08-24

    Abstract: A threaded joint for an oil well pipe, characterized as having a screw part and/or a metal-metal contacting part with no screws which have, formed thereon, 1) a lubricating coating of an inorganic polymer having a skeleton of M (metal atom)-O (oxygen) and containing a solid lubricating agent dispersed and incorporated therein, 2) a phosphate coating and the above lubricating coating of an inorganic polymer, 3) a Cu plating layer, and the above lubricating coating of an inorganic polymer or a lubricating coating of a resin containing a solid lubricating agent dispersed and incorporated therein, or 4) the above lubricating coating of an inorganic polymer or the above lubricating coating of a resin, and a rust-inhibiting coating containing an alkali metal or alkaline earth metal salt of a carboxylic acid. The threaded joint for an oil well pipe can prevent the occurrence of galling in repeated make-up and break-out operations and at the same time secure high oil-tightness, with no use of a liquid lubricating agent such as a compounded grease.

    Abstract translation: 一种用于油井管的螺纹接头,其特征在于具有螺纹部分和/或不具有形成在其上的螺钉的金属 - 金属接触部分,1)具有M(金属原子)骨架的无机聚合物的润滑涂层 )-O(氧),并含有分散并结合在其中的固体润滑剂,2)磷酸盐涂层和上述无机聚合物的润滑涂层,3)Cu镀层,以及上述无机聚合物或 含有分散并结合在其中的固体润滑剂的树脂的润滑涂层,或4)无机聚合物的上述润滑涂层或上述树脂润滑涂层,以及含有碱金属或碱土金属盐的防锈涂层 的羧酸。 用于油井管的螺纹接头可以防止在重复的化妆和分离操作中发生磨损,并且同时确保高的油密性,而不使用液体润滑剂如复合润滑脂。

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