Threaded joint for steel pipes and process for the surface treatment thereof
    104.
    发明申请
    Threaded joint for steel pipes and process for the surface treatment thereof 审中-公开
    钢管螺纹接头及其表面处理工艺

    公开(公告)号:US20040195826A1

    公开(公告)日:2004-10-07

    申请号:US10829292

    申请日:2004-04-22

    Inventor: Kunio Goto

    Abstract: This invention relates to a threaded joint for steel pipes which comprises a pin and a box each having a contact surface including a threaded portion and an unthreaded metal contact portion and which can be prevented from galling during repeated fastening and loosening without application of a compound grease. A solid lubricant coating which comprises a lubricating powder such as molybdenum disulfide and a resin binder is formed on the contact surface of at least one of the pin and the box. The coating is formed by applying a coating fluid and drying the applied coating by first stage heating in the temperature range of from 70null C. to 150null C. and second stage heating in the range of from higher than 150null C. to 380null C. The resulting solid lubricant coating has a hardness of 70-140 on the Rockwell M scale and an adhesive strength of at least 500 N/m as determined by the SAICAS (Surface And Interfacial Cutting Analysis System) method, and it exhibits excellent galling resistance even in the environment of high-temperature oil wells. Inclusion of ultraviolet screening fine particles such as titanium oxide fine particles in the solid lubricant coating increases the rust preventing properties of the threaded joint.

    Abstract translation: 本发明涉及一种用于钢管的螺纹接头,其包括销和箱体,每个销和箱都具有包括螺纹部分和无螺纹金属接触部分的接触表面,并且可以防止在反复紧固和松动期间不产生磨损而不施加复合润滑脂 。 在销和盒中的至少一个的接触表面上形成包含润滑粉末如二硫化钼和树脂粘合剂的固体润滑剂涂层。 通过施加涂布液并通过在70℃至150℃的温度范围内的第一阶段加热来干燥所涂覆的涂层并且在高于150℃至380℃的范围内进行第二阶段加热来形成涂层 ℃。所得固体润滑剂涂层在洛氏硬度计上具有70-140的硬度,并且通过SAICAS(表面和界面切割分析系统)方法确定的至少500N / m的粘合强度,并且显示出优异的 即使在高温油井的环境中也具有耐磨性。 在固体润滑剂涂层中包含紫外线屏蔽细颗粒如氧化钛微粒增加螺纹接头的防锈性能。

    LUBRICANT COMPOSITIONS AND METHODS
    107.
    发明申请
    LUBRICANT COMPOSITIONS AND METHODS 无效
    润滑剂组合物和方法

    公开(公告)号:US20020198114A1

    公开(公告)日:2002-12-26

    申请号:US08943125

    申请日:1997-10-03

    Inventor: Mr. Richard Levy

    Abstract: Abstract of DisclosureA lubricant composition is disclosed comprising a superabsorbent polymer combined with a material for decreasing friction between moving surfaces. The superabsorbent polymer absorbs from about 25 to greater than 100 times its weight in water and may comprise a polymer of acrylic acid, an acrylic ester, acrylonitrile or acrylamide, including co-polymers thereof or starch graft co-polymers thereof or mixtures thereof. In the composition, the material for decreasing friction comprises a petroleum lubricant containing an additive, water containing an additive, synthetic lubricant, grease, solid lubricant or metal working lubricant, wherein the synthetic lubricant, grease, solid lubricant or metal working lubricant optionally contain an additive. A method of lubricating a surface is also disclaosed comprising coating said surface with the lubricating composition comprising the superabsorbent polymer combined with a material for decreasing friction between moving surfaces, wherein the material for decreasing friction comprises a petroleum lubricant, water, synthetic lubricant, grease, solid lubricant or metal working lubricant, and optionally an additive.

    Abstract translation: 公开摘要公开了一种润滑剂组合物,其包含与用于减少运动表面之间的摩擦的材料组合的超吸收性聚合物。 超吸收性聚合物在水中吸收其重量的约25至大于100倍,并且可以包含丙烯酸,丙烯酸酯,丙烯腈或丙烯酰胺的聚合物,包括其共聚物或其淀粉接枝共聚物或其混合物。 在组合物中,用于减少摩擦的材料包括含有添加剂的石油润滑剂,含有添加剂的水,合成润滑剂,润滑脂,固体润滑剂或金属加工润滑剂,其中合成润滑剂,润滑脂,固体润滑剂或金属加工润滑剂任选地含有 添加剂。 润滑表面的方法也被包括在内,包括用包含超吸收性聚合物的润滑组合物涂覆所述表面,所述润滑组合物与用于减少运动表面之间的摩擦的材料组合,其中用于减少摩擦的材料包括石油润滑剂,水,合成润滑剂, 固体润滑剂或金属加工润滑剂,以及任选的添加剂。

Patent Agency Ranking