Permeable cements

Details Permeable cements Permeable cements

2005-04-26

2005-04-26

Kreck, John (Department: 3673)

Wells

Processes

Cementing, plugging or consolidating

C166S276000, C166S277000

Reexamination Certificate

active

06883609

ABSTRACT:
The present invention concerns a cement slurry with high permeability and good compressive strength, comprising a solid fraction constituted by: 35% to 80% (by volume) of particles with a mean size in the range 100 microns (μ) to 800μ; 0% to 15% (by volume) of particles with a mean particle diameter in the range 0.1 microns to 10 microns; and 10% to 40% (by volume) of particles with a mean particle diameter in the range 20μ to 50μ; a fraction of said-solid particles being constituted by a cement, and preferably a further fraction by self-destructive particles; a liquid fraction in a water/solid ratio in the range 38% to 50% by volume; and a percentage of cells, provided by a gas or a liquid which is not miscible with water, in the range 30% to 60% of the final volume of the slurry.

REFERENCES:
patent: 4883125 (1989-11-01), Wilson et al.
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patent: 5358047 (1994-10-01), Himes et al.
patent: 5529123 (1996-06-01), Carpenter et al.
patent: 5897699 (1999-04-01), Chatterji et al.
patent: 6626991 (2003-09-01), Drochon et al.
patent: 0814067 (1997-12-01), None
Bentz, et al. “Effects of particle size distribution on performance properties of Portland cement based materials” 1999 Cement and Concrete Research 29 (1999) 1663-1671.

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