RAW MIXTURE ADAPTED TO OBTAIN HEAT-PROTECTIVE PLUGGING MATERIAL USED IN PERMAFROST ROCK ENVIRONMENT Russian patent published in 2005 - IPC

Abstract RU 2267004 C2

FIELD: oil and gas well drilling, particularly plugging materials for casing pipe cementing in permafrost rock.

SUBSTANCE: raw mixture comprises plugging Portland cement in amount of 34.4 - 43.3% by weight, hollow glass microspheres in amount of 13.0-17.2 % by weight, superplasticizing agent in amount of 0.26-0.32, and water or raw mixture comprises plugging Portland cement in amount of 36.55 - 45.3% by weight, dressed hollow glass microspheres in amount of 13.24-18.5 % by weight, superplasticizing agent in amount of 0.28-0.34, remainder is water.

EFFECT: provision of time-reducing heat conductivity due to decreased moisture content in cement sheath, increased reliability of well structure protection against thawing in permafrost rock conditions, improved air-tightness of hole annuity, increased well output and reduced costs of well cementing and protection against thawing.

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RU 2 267 004 C2

Authors

Oreshkin D.V.

Ippolitov V.V.

Frolov A.A.

Pervushin G.N.

Dates

2005-12-27—Published

2003-10-31—Filed