Additive for hydraulic compositions, and hydraulic composition using same
US-2024199490-A1 · Jun 20, 2024 · US
Composition and methods to prevent corrosion by CO2 on cement composition
US8944166B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8944166-B2 |
| Application number | US-201414157585-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 17, 2014 |
| Priority date | Jul 28, 2008 |
| Publication date | Feb 3, 2015 |
| Grant date | Feb 3, 2015 |
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Abstract
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Methods and compositions that protect cement compositions from corrosion, particularly from wet carbon dioxide, are provided. A soluble salt additive is provided to react with reaction products generated during the reactions that occur when cement is exposed to wet carbon dioxide. The soluble salt reacts to form an insoluble salt that forms a protective layer on the surface of the cement that protects it from further corrosion from exposure to wet carbon dioxide.
First claim
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What is claimed is: 1. A method of reducing corrosion of a hardened cement in a cementing application comprising: (i) hardening a cement composition comprising Portland cement and an additive; (ii) exposing the cement composition to wet carbon dioxide after the cement composition has hardened; (iii) forming an insoluble calcium salt from the additive and calcium cations, the calcium cations having been formed from carbonic acid in wet carbon dioxide; and (iv) preventing carb…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8944166B2 cover?
- Methods and compositions that protect cement compositions from corrosion, particularly from wet carbon dioxide, are provided. A soluble salt additive is provided to react with reaction products generated during the reactions that occur when cement is exposed to wet carbon dioxide. The soluble salt reacts to form an insoluble salt that forms a protective layer on the surface of the cement that p…
- Who is the assignee on this patent?
- Baker Hughes Inc
- What technology area does this patent fall under?
- Primary CPC classification C04B28/02. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 03 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).