Equivalent circulating density control in deep water drilling
US7799742B2 · kind B2 · utility
42Cited by
33References
43Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2008 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Oct 1, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S507/91
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of providing a substantially constant rheological profile of a drilling fluid over a temperature range of about 120° F. to about 40° F. includes adding a drilling fluid additive to the drilling fluid, wherein the drilling fluid additive includes the reaction product of a carboxylic acid with at least two carboxylic moieties; and a polyamine having an amine functionality of two or more. A composition, such as an oil based drilling fluid, includes the reaction product of a carboxylic acid with at least two carboxylic moieties and a polyamine having an amine functionality of two or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.