Effect of Activator Type on the High-Temperature Properties of Alkali-Activated Slag Cementing Fluid.

The type of activator has a significant impact on the performance of alkali-activated slag, and there is little research on the effect of activator type on the high-temperature performance of alkali-activated slag. The effects of activator type on the thickening time, compressive strength, and rheological properties of alkali-activated slag under a high-temperature condition were studied in this article. Six activators were designed using Ca(OH), NaCO, and NaSO and their combination.

Preparation and Characteristics of a pH Intelligent Response Blocking Agent for the Microcrack in the Cement Sheath.

Microcracks in the annular cement sheath of oil wells frequently cause annular water channeling. Traditional cement squeeze technology has a low success rate in controlling this issue. Based on the conventional profile control water-blocking agent for underground in situ gelling and polyacrylic acid, a pH intelligent response microcrack-blocking agent was developed to block the microcrack in the cement sheath.