Metal pipe for oil well

Provided is a metal pipe for oil wells, which has high shear strength. This oil well metal pipe is provided with a resin film (100) on or above at least one of a pin contact surface (400) and a box contact surface (500). The resin coating (100) contains 50.0 to 99.5 mass% of a resin, 0 to 10.0 mass%...

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Bibliographische Detailangaben
Hauptverfasser: MATSUMOTO KEIJI, OCHIAI MAMORU, ABE CHIKA, IWAKI YUICHI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:Provided is a metal pipe for oil wells, which has high shear strength. This oil well metal pipe is provided with a resin film (100) on or above at least one of a pin contact surface (400) and a box contact surface (500). The resin coating (100) contains 50.0 to 99.5 mass% of a resin, 0 to 10.0 mass% of a wax, 0 to 30.0 mass% of a fluorine-based additive, 0 to 10.0 mass% of graphite, 0 to 30.0 mass% of an anti-rust pigment, 0 to 10.0 mass% of a coloring pigment, and 0 to 10.0 mass% of a coupling agent, and contains one or two selected from the group consisting of 1.5 to 50.0 mass% of a hydrous magnesium silicate powder and 0.5 to 30.0 mass% of TiO2, and satisfies formula (1) (W + F + G)/(M + T) < = 5.00 (1). 提供一种具有较高的剪切强度的油井用金属管。本公开的油井用金属管在公扣部接触表面(400)和母扣部接触表面(500)中的至少一者之上或上方具备树脂覆膜(100)。树脂覆膜(100)含有:树脂:50.0~99.5质量%、蜡:0~10.0质量%、氟系添加剂:0~30.0质量%、石墨:0~10.0质量%、防锈颜料:0~30.0质量%、着色颜料:0~10.0质量%、以及偶联剂:0~10.0质量%,且含有从由含水硅酸镁粉末:1.5~50.0质量%和TiO2:0.5~30.0质量%组成的组选择出的1种或两种,并且,树脂覆膜满足式(1),(W+F+G)/(M+T)≤5.00(1)。