Drilling fluid containing a surfactant having a high boiling point and a long chain tail group
US-9587162-B2 · Mar 7, 2017 · US
Thinner for oil-based drilling fluids
US10723929B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10723929-B2 |
| Application number | US-201615061175-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 4, 2016 |
| Priority date | Nov 19, 2015 |
| Publication date | Jul 28, 2020 |
| Grant date | Jul 28, 2020 |
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Abstract
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A thinner that is a poly fatty amide reacted with maleic acid to form a product, and diluting the product with a compound selected from the group consisting of oleyl alcohol, fatty acid, and poly condensed fatty acid is able to reduce the viscosity of oil-based drilling fluid, thus allowing for reuse of the oil-based drilling fluid.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of decreasing viscosity of an oil-based drilling fluid composition comprising a) adding a thinner to the oil-based drilling fluid to form an oil-based drilling fluid composition; wherein the thinner is produced by reacting a poly fatty amide with maleic acid to form a product, and diluting the product with a compound selected from the group consisting of an oleyl alcohol, a fatty acid, and a poly condensed fatty acid; b) injecting the oil-based drilling fluid composition into a wellbore; and c) retrieving the oil-based drilling fluid composition as it returns to the surface; wherein the thinner is present in said drilling fluid composition in a range of 0.03-1.5% weight percent wherein the poly fatty amide is made from a fatty acid or an oil reacted with polyamines at a temperature range of 100−190° C.; wherein the compound is present in said drilling fluid composition in the range of about 50% to 100% weight percent.
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- What does patent US10723929B2 cover?
- A thinner that is a poly fatty amide reacted with maleic acid to form a product, and diluting the product with a compound selected from the group consisting of oleyl alcohol, fatty acid, and poly condensed fatty acid is able to reduce the viscosity of oil-based drilling fluid, thus allowing for reuse of the oil-based drilling fluid.
- Who is the assignee on this patent?
- Cnpc Usa Corp
- What technology area does this patent fall under?
- Primary CPC classification C09K8/32. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 28 2020 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).