CEMENTING SLURRY FOR CEMENTING OIL AND GAS WELLS Russian patent published in 2010 - IPC C09K8/467

Abstract RU 2386660 C2

FIELD: chemistry.

SUBSTANCE: invention relates to cementing slurry used in cementing oil and gas wells. The cementing slurry for cementing oil and gas wells contains the following in wt %: portland cement 95, condensed microsilica 5, and over 100: polyvinyl acetate dispersion 0.3-0.6, condensed spent sulphite-alcohol liquor 0.2, tributylphosphate 0.2, polypropylene fibre with length of 6-12 mm, diametre 14-18 mcm 0.05-0.1. The cementing slurry contains water up to water/cement ratio of 0.38-0.42.

EFFECT: increased resistance of hardened cement paste to impact loads and increased adhesion of the hardened cement paste to bounding surfaces.

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RU 2 386 660 C2

Authors

Bakirov Danijar Ljabipovich

Burdyga Vitalij Aleksandrovich

Dates

2010-04-20—Published

2008-04-21—Filed