Patent · US Active

Fluid loss control additive and cement compositions comprising same

US7399355B2 · kind B2 · utility

15Cited by

29References

19Claims

0Family size

Assignees

Halliburton Energy Services, Inc. · US
BASF CONSTRUCTION POLYMERS GmbH · DE

Inventors

Michael J. Szymanski · Duncan, US
Samuel J. Lewis · The Woodlands, US
Christian Spindler · Günzburg, DE
Andrea Fenchl · Günzburg, DE

Key dates

Filing date	Feb 22, 2005
Grant date	Jul 15, 2008
Priority date	—
Expiry date	Nov 4, 2026

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2103/46
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A fluid loss control additive comprising a crosslinked polymer and sugar and cement compositions comprising the same. In one embodiment, the fluid loss control additive comprises a polymer and a sugar connected by a pH-sensitive crosslink. In some embodiments, the polymer is a polyvinyl alcohol, and the sugar is a sugar alcohol such as sorbitol.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.