Fluid loss additive for well drilling fluids

Abstract From the Canadian patent

An additive for drilling fluids employed in the deep well drilling industry, which additive comprises an organometal compound of titanium, zirconium or vanadium with humic acid and a further organic moiety which is at least one of fatty acid alkoxylates, fatty alcohol polyalkylene glycol ethers long-chain, amine alkoxylates optionally substituted with a hydroxyl group, or water-insoluble polyalkoxylates all of which are optionally mixed with fatty acids, and fatty acids alone these, having optionally been applied onto an inorganic carrier man-, datorily in the case of fatty acids alone. The fluid loss additive prevents the drilling fluid from streaming into porous drill formations. The …