Rheology modifier for cement slurries

Details Rheology modifier for cement slurries Rheology modifier for cement slurries

2011-03-01

2011-03-01

Bates, Zakiya W. (Department: 3676)

Wells

Processes

Cementing, plugging or consolidating

C166S300000, C106S724000

Reexamination Certificate

active

07896076

ABSTRACT:
Low-density cement slurries for cementing subterranean wells are described that comprise alkali swellable polymers as thickening agents that provide slurry stability. The polymers are preferably added as liquid latex dispersions, and may also comprise a surfactant that is present at a concentration below its critical micelle concentration. Particular utility is observed when the solid-volume fraction (SVF) of the slurry is less than about 40 percent. Also described are a method for increasing the viscosity of a cement slurry and methods for cementing a subterranean well.

REFERENCES:
patent: 5476144 (1995-12-01), Nahm et al.
patent: 2006/0122071 (2006-06-01), Reddy et al.
patent: 2007/0203028 (2007-08-01), Lewis et al.
patent: 2006061561 (2006-06-01), None
Cementing Technology for Low Fracture Gradient and Controlling Loss Circulation, Kris Ravi et al, Halliburton (SPE/IADC 102074).

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