«Onshore and offshore oil and gas well construction»

Quick-setting high-strength lightweight cement composition for supporting permafrost intervals

UDC: 622.245.422
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia

Keywords: lightweight cement mortars, permafrost, cement slurries, mineral binders

Annotation:

The authors of the article consider the development of fast-setting high-strength lightweight cement compositions for stabilizing permafrost intervals. The optimal ratio of binding component concentrations of different compositions for achieving the best strength properties is shown. Additional factors influencing the strength properties of the forming cement stone are identified. As it is known, the cement slurry should have a low freezing point, the hydration reaction shouldn’t lead to the permafrost melting, the formed stone should have satisfactory strength, resistance to cyclic alternating temperature effects and low thermal conductivity. The developed compositions have no analogues in their characteristics on the domestic market among mixtures on a mineral binder basis, and are aimed at improving the quality of permafrost intervals cementing. In the developed mixtures, each component is responsible for a specific result, thus guaranteeing not only the achievement of the specified strength properties, but also shrinkage and frost resistance.

Bibliography:

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