Przemysl Chemiczny, Vol.96, No.5, 990-992, 2017
Sealing slurries limiting natural gas exhalations from the annular space of a wellbore
Cement slurries were modified by addn. of a dispersing agent (Ca silicate) 6-8% and a butadiene-styrene-amide latex (15-20%) to decrease the permeability of the sealing. The optimum contents of the agent and latex were 6% and 20% by mass, resp.