Cement compositions with improved fluid loss characteristics and methods of cementing in subterranean formations
US6739806B1 · kind B1 · utility
70Cited by
40References
104Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2003 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jun 13, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/91
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides cement compositions comprising an improved fluid loss control additive, and methods for cementing in a subterranean formation using such cement compositions. The cement compositions comprise a hydraulic cement, water, and a fluid loss control additive comprising at least two polymers connected by a pH-sensitive crosslink. Optionally, other ingredients may be included in the compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.