Well cementing
US9611419B1 · kind B1 · utility
7Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2016 |
| Grant date | Apr 4, 2017 |
| Priority date | — |
| Expiry date | Apr 1, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/46
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hydraulic well cementing composition is disclosed. The well cementing composition contains a hydraulic cement and a fluid loss additive. The fluid loss additive is the polymerization reaction product of a two vinylamide monomers, wherein the polymerization reaction is conducted in the presence of a molecular weight control agent. One of the vinylamide monomers includes a sulfonic acid function, the second vinylamide monomer does not include a sulfonic acid function. The fluid loss additive controls fluid loss at temperatures up to 350° F.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.