Tube fitting and tube equipped with tube fitting
US-2020271251-A1 · Aug 27, 2020 · US
Oil-well metal pipe
US12474010B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12474010-B2 |
| Application number | US-202318730044-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 31, 2023 |
| Priority date | Feb 10, 2022 |
| Publication date | Nov 18, 2025 |
| Grant date | Nov 18, 2025 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
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 ).
First claim
Opening claim text (preview).
The invention claimed is: 1 . An oil-well metal pipe comprising: a pipe main body including a first end portion and a second end portion, the pipe main body including: a pin formed at the first end portion; and a box formed at the second end portion, wherein: the pin includes a pin contact surface including an external thread part; and the box includes a box contact surface including an internal thread part; the oil-well metal pipe further comprising: a zirconium oxide coating formed on one of the pin contact surface and the box contact surface, a first resin coating formed on or above the zirconium oxide coating, a plating layer formed on or above the other of the pin contact surface and the box contact surface, and a second resin coating formed on or above the plating layer. 2 . The oil-well metal pipe according to claim 1 , wherein the zirconium oxide coating is formed on the pin contact surface, and the plating layer is formed on or above the box contact surface. 3 . The oil-well metal pipe according to claim 1 , wherein the plating layer is a Zn—Ni alloy plating layer. 4 . The oil-well metal pipe according to claim 2 , wherein the plating layer is a Zn—Ni alloy plating layer.
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- What does patent US12474010B2 cover?
- 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 ) wit…
- Who is the assignee on this patent?
- Nippon Steel Corp, Vallourec Oil & Gas France
- What technology area does this patent fall under?
- Primary CPC classification F16L58/04. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Nov 18 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).