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2 648 730

(13)

(51)

IPC

C09K8/473(2006-01-01)

E21B33/138(2006-01-01)

C04B14/08(2006-01-01)

C04B14/10(2006-01-01)

C04B7/13(2006-01-01)

(21) (22)

Application

2016147193, 2016-12-01

(24)

Start date

2016-12-01

(22)

Actual filing date

2016-12-01

(45)

Published

2018-03-28

(72)

Inventor

Samokhvalov Mikhail Andreevich

(73)

Holder

Federalnoe Gosudarstvennoe Avtonomnoe Obrazovatelnoe Uchrezhdenie Vysshego Obrazovaniya Issledovatelskij Tomskij Gosudarstvennyj Universitet" Ni Tgu)

LIGHTWEIGHT GROUTING COMPOSITION Russian patent published in 2018 - IPC C09K8/473 E21B33/138 C04B14/08 C04B14/10 C04B7/13

Abstract RU 2648730 C1

FIELD: oil industry.

SUBSTANCE: invention can be applied in the gas and oil industry for cementing casing strings of operational and deep exploratory wells, in presence of rocks in a section prone to hydraulic fracturing. Lightweight grouting composition contains, wt%: Portland cement - 50-70, crushed and calcined at 500°C natural opal - balance.

EFFECT: technical result is a decrease in the density of a grouting solution prepared from the composition to a level that excludes hydraulic fracturing of rocks, at the strength of the formed cement stone at a level and above the strength of the cement stone from the additive Portland cement.

1 cl, 1 tbl

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RU 2 648 730 C1

Authors

Samokhvalov Mikhail Andreevich

Dates

2018-03-28—Published

2016-12-01—Filed