OIL-WELL METAL PIPE
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Jan 31, 2023
filing date -
Jan 31, 2023
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Abstract
Provided is an oil-well metal pipe which has excellent galling resistance even when a plating layer is formed on or above a contact surface of only one of a pin and a box. An oil-well metal pipe (1) according to the present disclosure includes: a pin (40) including a pin contact surface (400) with an external thread part (41); and a box (50) including a box contact surface (500) with an internal thread part (51). The oil-well metal pipe (1) according to the present disclosure further includes: a zirconium oxide coating (100) formed on one of the pin contact surface (400) and the box contact surface (500); a first resin coating (310) formed on or above the zirconium oxide coating (100); a plating layer (200) formed on or above the other of the pin contact surface (400) and the box contact surface (500); and a second resin coating (320) formed on or above the plating layer (200).
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