Dispersing agent for cement-slurry compounds, compounds containing this agent and procedures for the cementing of oil wells or similar.

摘要

The invention is a dispersing agent for cement-slurry compounds: the magnesium salt of the product of condensation of napthaleno-sulfonic acid and formaldehyde. It also covers cement-slurry compounds containing this dispersing agent, and the associated applications in the cementing of oil wells or similar. The Invention eliminates "free water" even at low temperatures and with those cements most susceptible to this phenomenon.