«Onshore and offshore oil and gas well construction»

Expanding additives effect on the cement stone formation

UDC: 622.245
DOI: 10.33285/0130-3872-2022-2(350)-28-34

Authors:

¹ Research Institute of Pipeline Transport (Research Institute "Transneft"), Moscow, Russia

Keywords: well construction, well cementing, grouting cements, cement stone shrinkage, contraction, expanding additives, expansion mechanism, hydration bonds

Annotation:

The article discusses the effect of expanding additives on grouting cements. Based on the analysis of chemical bondsproperties, the mechanism of expanding additives action in cement testing stone is considered, the influence of the properties of the hardening fluid and pressure on the possibility of the expansion effect manifestation is shown. The preference in the choice of methods for controlling the cement stone expansioneffect has been demonstrated.

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