Expansion agent for cement slurries Atren Expand™

Description

Description: a mixture based on finely dispersed metals with modifying additives.

Application: applied in oil extracting industry, in technological processes of well casing for improvement of lining the hole quality and bond quality on the border “rock-cement stone” and “cement stone — casing pipe” due to internal pressure in the cement mortar.

Recommended discharge: ATREN EXPAND is added to dry dement mixture subject to concentration up to 0,2 % (depending on application conditions) with regard to the weight of dry cement.

• Expanding effect of ATREN EXPAND is achieved due to hydrogen bubbling as a result of a chemical reaction in an alkaline medium, gas is in a diluted or compressed condition, however the stone does not become porous.
• Used for prevention of gas migration due to pressure within the solution, which compensates loss of hydrostatic pressure in the process of cement hardening.
• Gasification begins only when the grouting mixture is injected into the well and matures over the time of waiting on cement due to special cover retarding the start of the reaction.