Method for coating sliding surface of high-temperature member, high-temperature member and electrode for electro-discharge surface treatment
US-9187831-B2 · Nov 17, 2015 · US
Threaded connection for pipes or tubes and method for producing the threaded connection for pipes or tubes
US11435014B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11435014-B2 |
| Application number | US-201816613452-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 24, 2018 |
| Priority date | May 22, 2017 |
| Publication date | Sep 6, 2022 |
| Grant date | Sep 6, 2022 |
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- Title
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- Abstract
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- Assignees and inventors
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Abstract
Official abstract text for this publication.
This invention provides a threaded connection for pipes or tubes having high over-torque performance, and a method for producing the threaded connection for pipes or tubes. A threaded connection for pipes or tubes according to the present embodiment includes a pin and a box. The pin and the box include a contact surface including a threaded portion and a metal contact portion. The threaded connection for pipes or tubes includes a solid lubricant coating layer on at least one of the contact surfaces of the pin and the box, the solid lubricant coating layer including a resin, a solid lubricant powder, and Cr2O3.
First claim
Opening claim text (preview).
The invention claimed is: 1. A threaded connection for pipes or tubes comprising a pin and a box, the pin and the box each comprising a contact surface having a threaded portion and an unthreaded metal contact portion, the threaded connection for pipes or tubes comprising a solid lubricant coating layer on at least one of the contact surfaces of the pin and the box, and the solid lubricant coating layer containing: one or more types of resin selected from the group consisting of epoxy resin, phenol resin, polyamide-imide resin, and polyamide resin in a range of 60.0 to 90.0 mass %, one or more types of solid lubricant powder selected from the group consisting of graphite and polytetrafluoroethylene in a range of 5.0 to 25.0 mass %, and Cr 2 O 3 in a range of 5.0 to 19.2 mass %. 2. A method for producing the threaded connection for pipes or tubes according to claim 1 , comprising the steps of: applying a composition containing the one or more types of resin selected from the group consisting of epoxy resin, phenol resin, polyamide-imide resin, and polyamide resin in a range of 60.0 to 90.0 mass %, the one or more types of solid lubricant powder selected from the group consisting of graphite and polytetrafluoroethylene in a range of 5.0 to 25.0 mass % and 5.0 to 19.2 mass % of the Cr 2 O 3 to at least one of the contact surfaces of the pin and the box; and solidifying the composition applied to the contact surface to form a solid lubricant coating layer. 3. The method for producing the threaded connection for pipes or tubes according to claim 2 , the method further comprising the step of: before applying the composition, forming a Zn alloy plating layer by electroplating on at least one of the contact surfaces of the pin and the box. 4. The method for producing the threaded connection for pipes or tubes according to claim 3 , the method further comprising the step of: before forming the Zn alloy plating layer, forming surface roughness on at least one of the contact surfaces of the pin and the box.
Assignees
Inventors
Classifications
- C10M103/02Primary
Carbon; Graphite · CPC title
Condensation polymers of aldehydes or ketones · CPC title
Polyamides · CPC title
Metal oxides, hydroxides, carbonates or bicarbonates · CPC title
- F16L15/04Primary
with additional sealings · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11435014B2 cover?
- This invention provides a threaded connection for pipes or tubes having high over-torque performance, and a method for producing the threaded connection for pipes or tubes. A threaded connection for pipes or tubes according to the present embodiment includes a pin and a box. The pin and the box include a contact surface including a threaded portion and a metal contact portion. The threaded conn…
- 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 C10M103/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Sep 06 2022 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).