Coating agent 141 is a polymer formed by the copolymerization of propylene derivatives of different functional groups, which is easily soluble in water. It has improved the rheological parameters of drilling fluid, enhanced shear dilution capacity, reduced filtration loss, coated drilling chips, and is mainly used for low solid phase partial bulk polymer water-based drilling fluid. Coating agent 141 is a white or slightly yellow powder, is a polymer water-soluble polymer. There are hydrophilic groups such as anions in the polymer, which make them resistant to mild temperature and salt while inhibiting the hydration of mud shale. It is a good drilling fluid with coating agent.
