Abstract: A composition for use in agglomerating and removing solid contaminants in well fluids is disclosed. The composition comprises a carrier and the amide/glyceride reaction product obtained by heating a secondary amine in the presence of a fat or oil. The composition is used in processes to agglomerate the solids in contaminated well fluid and in which the agent is diluted and used as a preflush prior to replacing drilling mud with fresh well fluid.

Abstract: Sulfonated aromatic-formaldehyde condensation products are prepared by reacting a sulfonated aromatic compound with formaldehyde to form a condensation product which is neutralized or rendered alkaline by the addition of an aqueous solution of sodium hydroxide and further reacted with a small amount of urea, usually around 0.5 to 1% by weight of the total mass in order to produce a product which can be employed as a dispersant for oil well cementing compositions and exhibits less retardant effect than a similar dispersant prepared without the addition of the urea.